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$15.00 |
M105c This is
a great find!! Here is a very large, very nice quality specimen of Black
Mica from Canada. It measures 3 3/4" x 4 1/2" x 1" and has a nice shiny
appearance. This would make a great gift for the "hard to buy for" person.
Black Mica, or Biotite, is a sheet Silicate usually composed of Iron, Magnesium,
Aluminum, Silicon, Oxygen and/or Hydrogen. It is sometimes called 'Iron
Mica' because it is more iron rich than other Micas. It is also more
flexible than other Micas and may resemble a book with many pages.
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Black Canadian Mica
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$45.00 |
M113c This is
a nice quality and beautiful specimen of polished Malachite from Zaire, Africa.
The overall size of specimen is 2 3/4" x 3 5/8" x 1 1/4". This specimen
is polished on all sides except the bottom.
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.
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Malachite
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$12.00 |
M112b
Here is a very different mineral to add to your mineral collection.
This is a Hematite on Quartz specimen from Utah. It measures 4" x 3"
x 2" and has a nice silvery, sparkly appearance.
Hematite is a mineral form of Iron oxide. It is a very common
material that has a black to steel grey to silver grey color and may also
appear reddish brown. Hematite is a heavy metal mineral. When
it is polished it is consider to many to be of gemstone quality. It
is very popular in jewelry and Native American art.
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Hematite-Quartz
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$22.00 |
M106c
This is a smaller, but very pretty specimen of unpolished Malachite from Africa.
It measures 2 1/2" x 2 3/4" x 1 1/4" and has a natural botryoidal appearance.
This piece of Malachite is unpolished to show the natural beauty. A
very nice work of nature. 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.
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Malachite
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$60.00 |
M101b
Here is a very beautiful Tourmaline and Crystal Quartz
specimen. It measures 3" x 3" x 3". This is a natural beauty
that has many single Crystal points with several "petal" like formations of
black Tourmaline interspaced between the Crystals. This is a very wonderful
example of nature at its best. This material is from China.
Tourmaline is one of the most chemically complicated of all Silicate minerals.
It is a complex Silicate of Aluminum and Boron and the composition varies
widely with Sodium, Calcium, Iron, Magnesium, Lithium and many other elements
that enter into it's structure. It can occur in a long, slender needle-like
crystal to a thick prismatic and columnar crystal to a radial like daisy formation.
It comes in many colors usually black and brown (iron rich); brown and yellow
(magnesium rich); and blue, red, green, yellow, and pink (lithium rich).
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Tourmaline-Crystal Quartz
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$20.00 |
M107b
Here is a Galena-Pyrite-Quartz combination mineral specimen.
It measures 2" x 2" x 1" with a very unusual shape and design. This
is a one-of-a-kind mineral. Make it an addition to your collection today.
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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Galena
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$35.00 |
M100c A Spanish
Pyrite specimen from Navajun Mine, Piritas De Navajus S.L., Spain. This
specimen consists of 1 nice quality Pyrite cube with a smaller Pyrite cube
in matrix. The larger cube measures approximately 1/2" x 5/8" x 3/8"
in size and the smaller cube measures 1/8' x 1/8". They rest in a matrix
measuring 1 3/4" x 2 1/2" x 1 1/2".
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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Spanish Pyrite
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$35.00 |
M114b This is an interesting
mineral combination! Here is an Apophyllite-Stilbite-Heulandite mix.
This fantastic mineral measures 5 3/4" x 5 1/4" x 2 1/4" and has a super sparkly
appearance. A great way to begin your mineral collection with a smaller
collection all in one!!
Stilbite is another Silicate mineral from the Zeolite family.
It is often characterized by its sheaf like aggregates. The color is
usually white and when the cleavage is perfect, will have a distinct pearly
luster.
Apophyllite, also 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.
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Apophyllite-Stilbite-Heulandite
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$28.00 |
M108c
Here is something different for the mineral collector. This is a larger,
very unique Aragonite specimen. It measures 4 1/4" x 2 3/4" x 1 1/2"
and has a natural White to Cream color. This material has a botryoidal
shape and lots of character. The material is usually formed in the ocean and
will resemble Coral. Aragonite is a Carbonate mineral that can occur
in conjunction with Calcium Carbonates. Aragonite differs from Calcite
in the formation of the Crystal shapes which can be in lattice, crystal, columnar
or fibrous in many different designs, shapes and sizes. Aragonite will
form in mollusk shells, oceans and salt water caves as inorganic precipitates
called marine cements and speleotherms. Ammolite is a form of Aragonite
with impurities that make it iridescent and valuable as a gemstone.
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Aragonite
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$12.00 |
M111c Here
is a great find!! This is a smaller Malachite-Azurite specimen
from Rico, Colorado. It measures 1 1/8" x 2 1/8" x 1 1/2" and has a
natural texture. The mineral has a good color mix and resembles Chryscolla,
a rarer mineral. Azurite is a deep blue Copper mineral produced by
the weathering of Copper Ore deposits. The color is exceptionally clear
and deep. Azurite specimens are typically massive to nodular and are
often stalactitic in form. The color tends to lighten over time due
to the weathering of the specimen surface into Malachite.
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.
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Malachite-Azurite
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$250.00 |
M116b
Here is a larger, above average quality Crystal Quartz cluster from Arkansas.
It measures approximately 9" x 10 1/2" x 3 1/2" and has not been polished.
This unique cluster has several different Crystal formations including barnacles,
cathedrals, lasers, manifests, tabular and one well defined cross. This
wonderful beauty comes with its own stand and is boxed and ready to go to
its new home. Another photo.
Another photo.
Another photo.
Another photo.
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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Crystal Quartz
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$25.00 |
M102b
This is a different mineral for the avid mineral collector. Here is
a larger Copper Brown and White Aragonite specimen. It measures 3 1/4"
x 2 1/4" x 1 3/4" and has a natural sparkly appearance. This is an unique
mineral with interesting design and character. Aragonite is a Carbonate mineral that can occur in conjunction with
Calcium Carbonates. Aragonite differs from Calcite in the formation
of the Crystal shapes which can be in lattice, crystal, columnar or fibrous
in many different designs, shapes and sizes. Aragonite will form in
mollusk shells, oceans and salt water caves as inorganic precipitates called
marine cements and speleotherms. Ammolite is a form of Aragonite with
impurities that make it iridescent and valuable as a gemstone.
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Aragonite
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$30.00 |
M109c
Here is a very nice, larger specimen of Heulandite from India. It measures
3 1/2" x 6 1/2" x 2" and has a sparkly iridescent appearance. This mineral
is an unique combination as not only does it have a large specimen of Heulandite
but also 4 well defined cubical Apophyllite Crystals and numerous, tiny sword-like
Calcite Crystals. Absolutely AMAZING!! Heulandite is a member
of the tecto-silicate mineral family which is part of the Zeolite group.
It is often found with Calcium, Aluminum, Sodium, Potassium and Strontium.
It is found in Iceland, India, and on the eastern coast of the United States.
Heulandite can be white, yellow or red.
Apophyllite, also 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.
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Heulandite-Apophyllite-Calcite
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$45.00 |
M117b
Here is an above average quality of a larger specimen of Hemimorphite Crystals
setting on a dark Rust base of Limonite. It measures 6 1/2" x
3 3/4" x 2" with a natural rough appearance and many differently shaped translucent
Grey and Clear Crystals. A different mineral for the different collector.
This material is from Mexico. Limonite is an ore consisting of a
mixture of hydrated Iron Oxide-Hydroxide of varying composition of minerals
such as Goethite, Lepidocrocite, or Jarosite. It has been mined with
Hematite as an Ore for the production of Iron. Limonite is heavy and has a
yellow-brown color. It is often used as the pigment ochre in many paints.
Hemimorphite is a mineral that has been mined with Zinc and Lead ores
and is associated with Smithsonite. Some specimens will show a strong
green fluorescence in short wave UV light and weak light pink fluorescence
in long wave UV light. This mineral can be found world wide.
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Limonite-Hemimorphite
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$15.00 |
M103b Here is a very
nice, smaller Picture Sandstone slab from Arizona. It measures 2 1/2"
x 5" x 3/8" and has a smooth, unpolished finish. These slabs are very
unique in shape and size but would enhance any table or desk top. It
comes complete with a plastic display stand.
Sandstone is a sedimentary rock composed mainly of sand size mineral
or rock grains. Most Sandstone is composed of Quartz and/or Feldspar
because these are the most common minerals in the earth's crust. It
can be almost any color. The Sandstone beds often form highly visible
cliffs and are strongly identified with certain regions of the world.
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Picture Sandstone Slab
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$11.95 |
1K12
This is a Mineral Collection Kit. Enclosed is 18 different identified specimens.
They are, Amazonite, quartz, agate, alabaster, fossiliferous limestone, fluorite,
gold ore, marble, pyrite, calcite, jasper, obsidian, pumice, copper ore, lava,
Selenite, Lepidolite and variscite. The kit comes with a write up about
sedimentary, igneous and metamorphic rocks. Each specimen comes in its
own bag. This is a great learning item for kids. |
Mineral Collection Kit
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$15.00 |
M104c Here is a really
great find!! This is an extra nice, above average quality Dugway Geode
from Utah. It measures 3" x 2 1/2" x 1 1/2" and has a nice polish
on the front face. The inside of the cavity is lined with fine druzy Quartz
Crystals with a hint of Lavender color. Just beautiful.
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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Dugway Geode
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$35.00 |
M110b Here
is a very nice specimen of Purple Fluorite. This a nice quality mineral
measuring 3 1/4" x 2 1/2" x 1 1/4" and has a rough, natural texture with sparkly
iridescence. The color is a deep Purple with an almost translucent appearance.
This specimen is from Cave in the Park, Illinois. 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
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