Petrified Wood, Geodes, Crystals, Agates and Carvings

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Cost

Item Description

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$140.00

PR101b  Here is a very beautiful Madagascar Petrified Wood free form.  This awesome Petrified Wood has rich yellow, red, brown, orange and black colors with some natural cavities all in an unique design.  This specimen has a nice polish on all surfaces except the bottom. As you can see from the photo there are some fracture lines but it does not affect the stability of this piece.  It measures 6 3/4" tall x almost 4 1/4" x 3 3/4" and weighs over 5 pounds. A truly beautiful piece of polished Wood.

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Petrified Wood is a type of a fossil as it consists of fossil wood where all the organic materials have been replaced with minerals while retaining the original structure of the wood.  These minerals are most often Silicates such as Quartz.  Other minerals, Manganese, Iron and Copper, in the water or mud during the petrification process give Petrified Wood a variety of color ranges: black - Carbon; green/blue - Copper; red/brown/yellow - Iron.  Petrified Wood can preserve the original structure of the wood in all its detail all the way down to the microscopic level.  Structures such as tree rings and the various tissues are often observed features.  Although Petrified Wood can be found worldwide, it is rather rare in larger quantities and at times can be difficult to obtain by the average collector.

petrified wood

Petrified Wood

$135.00

PR100b  This is something different for the polished rock collector.  Here is a very nice large polished slab cut from a specimen of Brazilian Agate.  It measures 11 1/4" x nearly 6" x 2 1/4" thick and is polished on one side.  This beautiful piece has a tiny crystal cavity with a great Agate design throughout.  Just gorgeous!

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Agates mostly occur as nodules in volcanic rocks or waters containing Silica in solution which is possibly derived from the decomposition of Silicates in the lava.  The Siliceous matter is deposited in regular layers resulting in the banded or striped formation.  It is very unlikely that you would ever find an exact duplicate of any type of Agate, Brazilian or other.

agate

Brazilian Agate

$20.00

PR105b   This is a polished Free Form made of Black Hills Granite from South Dakota.  This cool specimen has good color, a nice design in the rock and a polished face with balance left natural. It measures nearly 5" tall x almost 3 7/8" wide x nearly 2 1/2" with cork pads on the bottom for protection.  The specimen was handcrafted in our own lapidary department. Definitely a one-of-a-kind treasure or makes a great gift!

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Granite is a common and widely occurring type of intrusive igneous rock. Granites are usually medium to coarse grained, occasionally with some individual Crystals. It can be pink to dark gray or even black depending on the chemistry and mineralogy. It is a hard and tough substance is used mostly in construction and landscaping.

polished rock

Black Hills Granite

$12.00

PR112b  Here is a very nice, above average quality Fluorite Free Form from China.  It measures almost 2 7/8" x over 1 3/8" x 1 1/4" and has a good polish on all sides.  This specimen has various pretty Purple and Green colors with lighter highlights. Very nice!

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Click here to view more beautiful Tumble Polished Rocks

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.

polished rock

Fluorite

$25.00

PR106c  This is a very pretty, above average quality Brazilian Agate slab (color enhanced).  It has been cut and polished on the face to show the awesome inside design.  The exceptional crystal center has sparkly crystals with interesting character.  The very pretty Brazilian Agate including the stand measures over 7" tall x almost 7 3/8" wide x 2 1/2".  It makes for a very interesting display piece or would make an excellent gift.

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Agates mostly occur as nodules in volcanic rocks or waters containing Silica in solution which is possibly derived from the decomposition of Silicates in the lava.  The Siliceous matter is deposited in regular layers resulting in the banded or striped formation.  It is very unlikely that you would ever find an exact duplicate of any type of Agate, Brazilian or other.

braz agate slab

Brazilian Agate Slab with stand

$50.00

PR111b  Here is something different from the gift department at the Rock Shed. This is a very cool Poly Chrome Jasper Free Form.  Highly polished on all sides, it has amazing colors, ranging from cream to orange to various greens in a excellent Poly Chrome design. This piece measures 6 1/4" tall x nearly 3 5/8" x almost 2 1/2".  It would make a great addition to any rock collection or a beautiful decoration item in your home.

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Jasper, also known as spotted stone, is an opaque, impure variety of Quartz that is usually red, yellow or brown in color.  The mineral breaks with a smooth surface and is used for ornamentation or as a gemstone.  It can be highly polished and is used for vases, seals, and other decorative items.

poly chrome jasper

Poly Chrome Jasper

$50.00

PR108b  This is a above average quality Rose Quartz Free Form from Brazil.  This gorgeous Rose Quartz has a lovely rose Pink color with lots of character and a nice polish.  It measures over 4 3/4" tall x 3 1/4" x 2 1/2".  A very nice piece indeed!

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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.

rose quartz

Rose Quartz Free Form

$40.00

PR102c  This is a very nice Black Skin Agate specimen from Madagascar.   It was cut and highly polished on the face to show the inner beauty.  The specimen shows a beautiful black, white and gray colors accented with browns on the outside in the unique Black Skin Agate design.  The agate design is also very visible with excellent banding on the unpolished backside. It measures 6" x  over 2 1/4" x nearly 1 5/8".   Very beautiful!

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Agates mostly occur as nodules in volcanic rocks or waters containing Silica in solution which is possibly derived from the decomposition of Silicates in the lava.  The Siliceous matter is deposited in regular layers resulting in the banded or striped formation.  It is very unlikely that you would ever find an exact duplicate of any type of Agate, Brazilian or other.

agate

Black Skin Agate

$65.00

PR103c  Here is a really great find!!  This is a nice, above average quality Dugway Geode from Utah.  It measures nearly 7 5/8" wide x almost 5 7/8" x nearly 2 3/4" and has a nice polish on the front face. The inside of the cavity is lined with fine druzy Quartz Crystals with a pale gray to White color.  The inside shows up a bright aqua green under long wave UV light.  The geode does have some chips around the outer edge and that is reflected in our price.  It's still very nice.

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Click here to buy Ultraviolet Lamps

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.

dugway geode dugway geode

Dugway Geode

$50.00

PR107c   Here is a great addition to your office or home.  This is a nice larger Smokey Quartz Crystal with a natural finish on all sides.  It measures nearly 4 1/4" tall x 4 1/2" x almost 3 5/8"; weighs nearly 2 1/2 pounds and has some interesting inclusions.  This crystal has multiple facets where the crystal at one point stopped growing and then started again. The polish on the tip is not perfect but it still displays very well.  Something very different for the collector or the gift giver.

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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.

polished rock

Smokey Quartz Crystal

$40.00

PR110b This is a very beautiful specimen of polished Malachite from Zaire, Africa.  The fantastic Malachite specimen is highly polished on all sides except the bottom and has a super range of shaded Green colors with a very nice design. The overall size of this gorgeous specimen is 4 1/4" x nearly 3 5/8" x almost 1" thick and weighs nearly 1 pound.

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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

$45.00

PR113c  This is a very pretty larger Amethyst Cactus Quartz Crystal Cluster with a unique shape.  This extraordinary piece measures almost 3" x over 2 1/2" x almost 2 5/8" tall and has not been polished.  This naturally sparkly specimen with multiple points is from the Magaliesberg Mountains west of Pretoria, South Africa.  A true beauty of nature!

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These Cactus Quartz Crystals are often slender Crystal cores with Amethyst tips and are coated with orange Hematite stained mini Crystals giving the bristly, cactus appearance.  Sometimes they may have a druzy veil in lavender or yellow or white.  Each in unique in their own right and can not be duplicated.

cactus quartz crystal

Cactus Quartz Crystal

$50.00

PR115b   This is a very cool Poly Chrome Jasper Free Form.  Highly polished on all sides, it has amazing color, ranging from various pretty orange colors to brown and dark yellow to more of cream to grayish greens; all in a excellent Poly Chrome design. This gorgeous piece measures almost 4 7/8" tall x 2 1/2" wide x nearly 2 3/8" thick.  It would make a great addition to any rock collection or a beautiful decoration item in your home.

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Jasper, also known as spotted stone, is an opaque, impure variety of Quartz that is usually red, yellow or brown in color.  The mineral breaks with a smooth surface and is used for ornamentation or as a gemstone.  It can be highly polished and is used for vases, seals, and other decorative items.

polished rock

Polychrome Jasper

$60.00

PR104b  Here is an amazing Black Amethyst geode section.  This gorgeous piece has lots of sparkly purple tinted Black Amethyst crystals. This piece measures nearly 5 3/4" x almost 3 1/4" x nearly 2 5/8" with a natural unpolished appearance. This was part of a larger geode at one time and is a real beauty!

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Click here to view more Amethyst specimens!

Amethyst is a purple variety of Quartz often used as an ornament. It occurs in color from a light, slightly pinkish violet to a deep grape purple. Upon exposure to heat, Amethyst generally becomes yellow, which some refer to as Citrine or "burnt" Amethyst. It is widely distributed as a mineral, but fine, clear specimens that are suitable for cutting as ornamental stones.

amethyst

Black Amethyst

$40.00

PR109b  This is a very nice, above average quality multi-colored Marble Candy Jar with lid from China.  It measures almost 3 1/8" tall including the lid x nearly 4 3/4" in diameter and is highly polished all around except for the bottom.  It makes for a very interesting display piece or would make a nice gift.

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Peacock Marble is from Southwest China and formed in Limestone by heat and pressure in the earth's crust. Recrystallization during Himalaya formation caused the limestone to change in texture and makeup. Fossilized materials along with it's original carbonate minerals, recrystallized and formed large, coarse grains of calcite. Impurities present in the limestone during the recrystallization affected the mineral composition of the marble.  The minerals that result from the impurities give the marble up to ten different colors. The corresponding colors and minerals that can be found: Green - Serpentine; Purple - Manganese spar; Brown - Iron; Gray - Silicon Dioxide; Red - Hematite; Orange - Iron; White - Calcite; Violet - Iron Manganese; Yellow - Limonite; Blue - Copper, Cobalt, Chromium; Black - Carbon, Iron, Manganese. Peacock Marble is also called "seven color Jade" in local language.

marble jar

Marble Candy Jar

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