Minerals from Different Locations

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$50.00 M600c  Here is something different for the mineral collector.  This is a very cool Orange Calcite and Tourmaline combination specimen from an unknown location.  The interesting combination mineral has a nice Orange colored Calcite contrasting with the numerous small black Tournmaline all mixed in with other unknown minerals.  The fascinating combination mineral exhibits an amazing show under Short Wave UV light.  The excellent specimen measures 6 1/2" x almost 4 3/8" x 2" thick.  This unique specimen has a unique shape and lots of interesting character.  Just nice!

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Calcite is a Carbonate mineral that is most widely distributed on the Earth's surface. It is a common constituent of sedimentary rocks with Limestone in particular. A Calcite formation can take on many different shapes and sizes which is dependent on the location, ground water occurrence and temperature. Calcite is usually white or colorless but can be gray, red, yellow, green, blue, violet, brown or black. The deeper the color is usually indicative of the definitive impurities from the earth or water.

The Tourmaline mineral group is chemically one of the most complicated groups of Silicate minerals.  Its composition varies widely with Sodium, Calcium, Iron, Magnesium, Lithium, Aluminum, Boron and other elements.  It has a wide variety of colors including black, blue-black, brown, yellow, red, green, pink and is rarely colorless.  This mineral is found in igneous rocks, like Granite Pegmatite, and metamorphic rocks such as Schist and Marble.

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Orange Calcite - Tourmaline


$25.00 M601b  Here is a very pretty specimen of Cobaltocalcite or Sphaerocobaltite on Matrix from Zaire in Africa.  This unusual and eye catching specimen has a natural Pink color with some darker spots mixed in all with a cool Botryoidal texture with lots of character.  It measures over 3" x 2 1/2" x 1 7/8" and has a natural sparkly shine. A very nice, unique specimen.

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Sphaerocobaltite, also known as Cobaltocalcite or Cobaltian-calcite, is a colorful and beautiful mineral.  The deep rose-red to pink color it has makes is easy to confuse with Rhodochrosite or Stichtite as all have the similar red to pink colors. Impure specimens can be shades of pink to pale brown. It is found as crusts and small crystals in many cobalt ore locations.

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Cobaltocalcite


$15.00

M602c  This is something different for the mineral collector.  Here is a nice section of a Purple Amethyst Geode from Brazil.  The pretty specimen measures 4 1/8" x almost 3 1/4" x 2" and has a natural super sparkly appearance.  This lovely piece has an excellent array of various shades of Purple Amethyst Crystals accented by some tiny clear crystals mixed in.  Some of the crystals have damage to the tips and is reflected in our price.  Just plain beautiful!

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Click here to view more Amethyst specimens!

Amethyst is a purple variety of Quartz often used as an ornament.  Upon exposure to heat, Amethyst generally becomes yellow, which some refer to as Citrine or "burnt" Amethyst.  It occurs in color from a light, slightly pinkish violet to a deep grape purple.  It is widely distributed as a mineral.

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Amethyst

$30.00 M603b  Here is a very nice quality combination specimen of Wulfenite and Mimetite from Durango, Mexico.  This exceptional piece has some Yellow Wulfenite crystals of different sizes and shapes poking out in all directions from the pretty green Mimetite and rust colored matrix.  No matter from what angle you look at it, it's just plain gorgeous.  This beautiful, rarer mineral measures 2 1/8" x 2 3/8" 1 3/4" and has a natural, unpolished appearance with sparkly iridescence.   Very, very cool!

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Wulfenite is a lead molybdate mineral named for an Austrian mineralogist. It is most often found as stubby, pryamidal or tabular crystals in a bright orange-red to yellow-orange color. It is found in many locations, associated with lead ores as a secondary mineral and often found with Cerussite, Smithsonite, Hemimorphite, Vanadinite, Mimetite and other minerals. Among the more notable locations for finding Wulfenite are Pennsylvania, Arizona and Mexico.  

Mimetite is an Arsenic mineral often associated with Lead, Galena, Vanadinite, Wulfenite, Calcite and Arsenopyrite.  It resembles Pyromorphite as it falls in the same series of minerals as Pyromorphite and Vanadinite.  Mimetite is known as a collector's specimen often creating botryoidal crusts on the the surface of the specimen.  It is not used as a gemstone due to its softness.

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Wulfenite Mimetite

$45.00 M604b  Here is a very nice specimen of Green Fluorite from China.  It has a beautiful range of nicely defined, nearly clear light Green Fluorite crystals.  It measures almost 2 3/4" x 2" x almost 1 3/4".  Absolutely amazing.

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Fluorite, also referred to as fluor-spar, is a mineral composed of Calcium Fluoride.  It is a widely occurring mineral found world wide and is often found with metallic minerals such as Galena, Sphalerite, Barite, Quartz and Calcite.  Fluorite may fluoresce strongly in ultraviolet light which may be due to the presence of some impurities such as Yttrium.  Blue is the most common color but red, purple, green, yellow and white are also frequent.  It can be used in high performance telescopes, camera lens, enamels and in the making of opalescent glass.

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 Fluorite


$45.00 M605c  Here is a very nice specimen of Smithsonite from Chihuahua, Mexico.  It has a pretty pale Aqua Blue to Green color desired by many collectors.  It measures 6 1/8" x 2 7/8" x almost 1 3/4" with a natural unpolished botryoidal surface. 

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Smithsonite is a mineral ore of zinc, commonly confused with Hemimorphite until it was realized they are two distinct minerals. They are similar in appearance and are found in similar colors. Smithsonite often occurs in association with other minerals like Hemimorphite, Willemite, Cerussite, Malachite and Azurite. It was named in honor of James Smithson first identified the mineral and whose bequest established the Smithsonian Institution.

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Smithsonite

$40.00 M606c  Here is a very unique Beryl Crystal specimen from South Dakota.  This cool crystal has a dirty cream color, nearly the same color as the surrounding matrix rock and is "as found" in nature.  It measures almost 4 1/8" long x over 1/2" in diameter with the matrix measuring nearly 5 7/8" x 4 1/4" x 4".  The matrix rock consists of Feldspar and Sodaspar with some Mica mixed in and evidence where another Beryl Crystal once was.  This is a one-of-a-kind mineral for the one-of-a-kind mineral collector.

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Beryl is a mineral composed of beryllium aluminium cyclosilicate. Pure beryl is colorless, but it is frequently tinted by impurities; possible colors are green, blue, yellow, red, and white. The name beryl is derived from Greek which referred to a "precious blue-green color-of-sea-water stone". Beryl of various colors is found most commonly in granitic pegmatites, but also occurs in mica schists in the Ural Mountains, and limestone in Colombia. Beryl is often associated with tin and tungsten ore bodies and is found world-wide.

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Beryl

$30.00

M607c   Here is a very different and nice interesting specimen of a Geode filled with sparkly clear Quartz crystals surrounded by the yellow colored matrix rock.  The large and very pretty clear crystals protrude in all different ways.  The entire specimen is 4 7/8" x almost 4 1/4" x 4 1/8" with an all natural texture and finish. This astonishing work of nature is from Morocco.  

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Quartz is the second most common mineral in the Earth's continental crust.  It is mainly composed of Silica or Silica based minerals.  Although Quartz is known by a variety of names, the most important distinction between types of Quartz is that of macro-crystalline, individual crystals visible to the unaided eye, and micro-crystalline, where aggregates of crystals are only visible under high magnification.  There are many forms of Quartz including Chalcedony, Amethyst, Citrine, and Carnelian which are results of mineral impurities or heat treatments.

Geodes are geological rock formations which occur in sedimentary and certain volcanic rocks.  They are essentially rock cavities or vugs with internal Crystal formations or concentric banding.  The exterior is generally Limestone while the interior contains Quartz Crystals and/or Chalcedony deposits.  If the Geode is completely filled with Crystal, being solid all the way through, it is then called a nodule.

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Quartz Geode

$25.00

M608b  Here is something really different for you mineral collection!!  This is a very nice, above average quality Pyrite Sun.  It measures nearly 4 1/4" x 3 5/8" x 1/4" thick and has a natural shiny appearance on both sides.  This beauty was found in the coal mines of Illinois and were surrounded by Black shale and coal.  They date in age to 350 million years old.

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Pyrite, or Iron Pyrite, is an Iron sulfide with isometric Crystals that usually appear as cubes.  It is brittle and can break or powder easily.  Its metallic luster and brass yellow hue have earned it the nickname of "fool's gold" due to many miners mistaken it for the real thing.  Ironically, small quantities of actual gold are sometimes found in Pyrite.  It is the most common of the sulfide minerals and is usually found with other sulfides or oxides in Quartz veins, sedimentary or metamorphic rocks. 

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Pyrite Sun

$90.00 M609c   Here is a new find at the Rock Shed.  This is an excellent quality, larger specimen of Amber colored Barite crystals of different sizes and shapes all on an unidentified matrix.  The interesting and unique specimen measures 2 7/8" x almost 2 5/8" x nearly 2".   The sparkly Barite crystals are complimented by the natural rough texture of the matrix and is from Peru.  Very, very nice!

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Barite or Baryte is a mineral consisting of Barium sulfate and is generally white or colorless. The baryte group consists of baryte, celestine, anglesite and anhydrite. Baryte commonly occurs in lead-zinc veins in limestones, in hot spring deposits, and with hematite ore. It is used in the manufacture of paints and paper. Although Barite contains a 'heavy' metal, Barium, it is not considered to be a toxic chemical because of its extreme insolubility.

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Barite

$25.00

M610b  Here is a gorgeous specimen of Vanadinite on matrix.  It measures nearly 4 3/4" x almost 2 1/2" x 3" and has many sparkly Red and burnt Orange colored hexagonal Vanadinite crystals all over the matrix.  This is a beautiful work of nature and very fragile. This mineral is from Morocco.

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Vanadinite is a mineral belonging to the Apatite group of Phosphate minerals.  It is one of the main industrial Ores of the metal Vanadium and a minor source of Lead.  Vanadinite is relatively uncommon and is associated with Galena, Wulfenite, Limonite and Barite.  It is usually bright red or orange-red in color although it may sometimes be brown, red-brown, grey, yellow or colorless.

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Vanadinite

$100.00

M611c  This is a very nice, above average quality Smokey Quartz specimen.  Under close inspection, this very cool crystal has lots of rutiles and phantom lines inside that photographs don't do justice.  It measures 4 3/4" long x 2 1/2" x 1 1/2" and has a pretty sparkly appearance.  This Smokey Quartz crystal is all natural and has not been heat treated but does have minor tip damage.  This material is from Arkansas.

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Quartz is the second most common mineral in the Earth's continental crust.  It is mainly composed of Silica or Silica based minerals.  Although Quartz is known by a variety of names, the most important distinction between types of Quartz is that of macro-crystalline, individual crystals visible to the unaided eye, and micro-crystalline, where aggregates of crystals are only visible under high magnification.  There are many forms of Quartz including Chalcedony, Amethyst, Citrine, and Carnelian which are results of mineral impurities or heat treatments.

smokey quartz

Smokey Quartz

$24.00

M612c   This is a nice natural native copper specimen from Pennsylvania which has been partly removed from the matrix rock which was surrounding it.  The white quartz matrix rock is visible in many areas.  It measures 4" x almost 2 3/4" x nearly 1 1/2" and has a natural texture and finish.  Just a nice specimen of something different!

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Copper is a reddish colored metal with a high electrical and thermal conductivity.  It has its characteristic color because it reflects red and orange light and absorbs other frequencies in the visible spectrum due to its band structure.  It is in the same family as Silver and Gold and is a malleable metal.  It is beautiful natural or polished. 

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Copper

$60.00

M613B  Here is a gorgeous specimen of Vanadinite on matrix.  It measures 6" x over 6" x 2" and has many bright Red and burnt Orange colored hexagonal Vanadinite crystals of all sizes.  This is a beautiful work of nature and is absolutely stunning. This mineral is from Morocco.

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Vanadinite is a mineral belonging to the Apatite group of Phosphate minerals.  It is one of the main industrial Ores of the metal Vanadium and a minor source of Lead.  Vanadinite is relatively uncommon and is associated with Galena, Wulfenite, Limonite and Barite.  It is usually bright red or orange-red in color although it may sometimes be brown, red-brown, grey, yellow or colorless.

hemimorphite

Vanadinite

$50.00 M614c   Here is a very nice, above average quality specimen of Malachite.  It has an unique fibrous pattern and various pretty Green colors with an all natural texture.  The mineral measures nearly 4" x almost 3 1/4" x 2" and has a very attractive appearance.  Absolutely amazing.

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Malachite is a Copper Carbonate mineral that often forms botryoidal, fibrous or stalagmitic masses.  It is often the result of the weathering of Copper Ores and is commonly found with Azurite, Goethite and Calcite.  It is typically associated with Copper deposits including Limestone which is the source of the Carbonate.  Malachite is found in many regions world wide and is usually shaded green in color.

malachite

Malachite

$18.00 M615c  Here is something different for the mineral collector.  This is a very nice, above average quality Fluorite specimen from China.  The lovely mineral specimen has very pretty purple colored Fluorite crystals accented with lighter creamy white all in a natural and unpolished state.  It measures 3 3 /4" x almost 2" x 1 3/8" with an unique and beautiful appearance.

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Fluorite, also referred to as fluor-spar, is a mineral composed of Calcium Fluoride.  It is a widely occurring mineral found world wide and is often found with metallic minerals such as Galena, Sphalerite, Barite, Quartz and Calcite.  Fluorite may fluoresce strongly in ultraviolet light which may be due to the presence of some impurities such as Yttrium.  Blue is the most common color but red, purple, green, yellow and white are also frequent.  It can be used in high performance telescopes, camera lens, enamels and in the making of opalescent glass.

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 Fluorite

$28.00 M616c  Here is something different for the mineral collector.  This is a very nice, above average quality combination mineral which includes White Quartz, sparkly Pyrite and Galena all wrapped up in one super specimen.  The mineral group measures 2 1/2" x 2 1/2" x 1 5/8" and has a beautiful appearance.

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Pyrite, or Iron Pyrite, is an Iron sulfide with isometric Crystals that usually appear as cubes.  It is brittle and can break or powder easily.  Its metallic luster and brass yellow hue have earned it the nickname of "fool's gold" due to many miners mistaken it for the real thing.  Ironically, small quantities of actual gold are sometimes found in Pyrite.  It is the most common of the sulfide minerals and is usually found with other sulfides or oxides in Quartz veins, sedimentary or metamorphic rocks. 

Galena is the natural mineral form of Lead Sulfide.  It is the most important Lead ore mineral and is one of the most abundant and widely distributed sulfide minerals.  It is often associated with Sphalerite, Calcite and Fluorite.  Galena deposits often contain significant amounts of Silver, Zinc, Cadmium, Antimony Arsenic and Bismuth.  It is used as a semiconductor in early wireless communication systems.  It is usually dark grey to black in color with a shiny iridescence.

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 Pyrite-Quartz-Galena


$12.00 M617c  Here is a sparkly Apophyllite Stilbite combination specimen. The pretty specimen has a nice unique appearance with the small light peach colored Stilbite mixed in with the pale green to clear Apophyllite crystals.  This cool mineral combination measures almost 2" x 1 7/8" x nearly 1 3/8".  A great way to begin your mineral collection!  This material is from Jalgaon, India.

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Apophyllite, a Zeolite, is Silicate mineral with very well defined clear Crystals and is very popular as a collector's mineral.  The Crystal structure will refract like in obvious rainbows and can form "natural pyramids" when tumbled.

Stilbite is another Silicate mineral from the Zeolite family.  It is often characterized by its sheaf like aggregates.  The color is usually white or pink and when the cleavage is perfect, will have a distinct pearly luster.

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 Apophyllite - Stilbite

$12.00

M619b  This is a very pretty, natural Aquamarine specimen from Brazil.  The pale Aqua blue Aquamarine has an interesting shape and measures 2 7/8" x almost 2 3/4" x nearly 1" and has a natural texture and finish.  This is a lovely specimen of something different!

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Aquamarine (from Latin: aqua marina, "water of the sea") is a blue or cyan variety of beryl.  It occurs at most localities which yield ordinary beryl.  Beryl is a mineral composed of beryllium aluminium cyclosilicate.  The pale blue color of aquamarine is attributed to Fe2+ (or iron).  The Fe3+ ions produce golden-yellow color, and when both Fe2+ and Fe3+ are present, the color is a darker blue as in maxixe.  In the United States, aquamarines can be found in the Sawatch Range in central Colorado and in the Big Horn Mountains of Wyoming.

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Aquamarine

$75.00

M620c  Here is something really different for you mineral collection!!  This is a very nice, very pretty lab grown Aluminum specimen.  It measures 5 3/4" x 4 1/4" x almost 4 1/4" tall and has a natural shiny appearance on all sides.  This unique and gorgeous specimen has numerous lovely shiny silvery crystals protruding up from the base in all different directions.  Some of the crystals are loose to the touch but are attached and this is reflected in our price.  A wonderful and unique specimen for your mineral collection!

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Aluminum is a silvery-white, soft, nonmagnetic, ductile and malleable metal with appearance ranging from silvery to dull gray. It is the third most abundant element (after oxygen and silicon), and the most abundant metal, in the Earth's crust. It makes up about 8% by mass of the crust but is so chemically reactive that native specimens are rare and limited to extreme reducing environments. Instead, it is found combined in over 270 different minerals. The chief ore of aluminum is bauxite.

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Aluminum

$50.00

M621b   Here is a wonderful combination specimen of Epidote and Quartz crystals from Brazil.  The Quartz crystal cluster has the dark green Epidote columnar prisms embedded and protruding from it.  There are numerous other smaller Quartz crystals along with more dark green Epidote mixed in.  The entire specimen measures almost 3 5/8" x 2 1/4" x 1 5/8".   This fabulous item is a marvelous work of nature and an excellent piece for yours or any mineral collection.  

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Epidote is an abundant rock-forming mineral, but one of the secondary origin. Many of the characters of the mineral vary with the amount of iron present. Prismatic, columnar crystals, often shiny, finely striated faces. The color is green, gray, brown or nearly black but usually a characteristic shade of yellowish-green or pistachio green.

Quartz is the second most common mineral in the Earth's continental crust.  It is mainly composed of Silica or Silica based minerals.  Although Quartz is known by a variety of names, the most important distinction between types of Quartz is that of macro-crystalline, individual crystals visible to the unaided eye, and micro-crystalline, where aggregates of crystals are only visible under high magnification.  There are many forms of Quartz including Chalcedony, Amethyst, Citrine, and Carnelian which are results of mineral impurities or heat treatments.

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Epidote - Quartz

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