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Cost
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Item
Description
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Click Picture
for Larger Image
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$175.00 |
M500b
This is a beautiful large specimen of Celestite. This lovely Celestite has many, many very nicely defined and sparkly
icy blue crystals some of which has pretty "rainbow" reflections. It
measures 9" x 5 1/4" x 5 7/8", weighs nearly 9 pounds and has not been
polished. The pictures don't really do it justice, this piece is
awesome.
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Celestite is a mineral form of Strontium Sulfate which is a metal.
The metal is mixed with Carbon and Sulfur which is used for the red "fire"
in fireworks, flares and road signals. Celestite occurs as Crystals
and in compact massive and fibrous forms. It is mostly found in sedimentary
rocks and is often associated with Gypsum, Anhydrite and Halite. Pale
blue Crystal specimens are found in Madagascar.
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Celestite
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$18.00 |
M501c
Here is something different for the mineral collector. This is
a nice specimen of Wavellite on matrix and is from Arkansas. Close
inspection shows the signature "starburst" of the pale colored Wavellite. This
interesting mineral measures over 2 7/8"
x almost 2" x nearly 1 1/2" and has a pale green color. A really different
mineral for the mineral collector.
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Chemically, Wavellite is Hydrated Aluminum Phosphate Hydroxide.
It is a secondary mineral found most often in aluminous, low-grade metamorphic
rocks. Normally it forms as radiating "starburst" clusters of green to yellow-green
crystals. It will show its fibrous structure on fracture surfaces in the matrix.
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Wavellite
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$50.00 |
M502b
This is something different
for the rock collector. Here is a excellent example of Dogtooth
Calcite. It has very nice dark tan to dusty rose colored scalenohedral
or "dogtooth" calcite crystals emerging from the matrix pointing
in all different directions. Much of the
Dogtooth Calcite specimen is covered with a frosty and sparkly coating that appears like ice or snow. The
lovely specimen measures almost 5 1/2" x
3 1/2" x
nearly 3". A true wonder of nature.
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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.
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Dogtooth Calcite
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$50.00 |
M503b Here is a
very nice combination specimen of Wulfenite and Mimetite from Durango,
Mexico. This exceptional piece has many small Yellow Wulfenite crystals of different sizes and shapes poking
out in all directions from the pretty green Mimetite and rust colored
matrix. The unique mineral measures 3 1/8" x 2 1/4" x
1 1/4" and has a natural appearance. Definitely something different
to start a mineral collection.
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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.
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.
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Mimetite - Wulfenite
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$125.00 |
M504b Here
is a very nice, above average quality Smoky Quartz Crystal loaded with
Rutiles from
Brazil. This exceptional Crystal measures 2 3/4" x 2 3/8"
x 3 7/8" tall. It
has excellent clarity, cool
inclusions, "rainbow" reflections and abundant Rutilers that only add to the wonderful character. A beautiful addition
to any Crystal collection. Another photo
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Click
here to view more amazing Crystal specimens!
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. Rutile is a mineral
composed primarily of Titanium Dioxide. Rutile has among the highest
refractive indices of any known mineral and also exhibits high dispersion.
Rutile is known to contain up to 10% Iron as well as significant amounts
of Niobium and Tantalum. Rutile creates small needles within crystals that
can be seen when held up to light. |
Smoky Rutilated Quartz Crystal
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$80.00 |
M505c
Here is an interesting find. This is a very nice
specimen of Stibnite from Romania. It has sparkly Grey metallic colored
crystals going in all directions and an unique appearance. The
specimen measures 4 3/8" x nearly 3 5/8" x 2" and makes for an interesting
display of an unusual mineral.
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Stibnite, also known as Antimonite, is a Sulfide mineral that forms
grey Crystals. It is the most important source for the rare Metalloid
Antimony. It is used in the manufacture of fireworks, batteries, safety
matches and mascara.
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Stibnite
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$24.00 |
M506c
This is something different for the
mineral collector. Here is a very nice section of a Purple Amethyst
Geode. The beautiful specimen measures nearly 4 1/4" x
almost 2 3/4" x over 1 1/2" and has a natural sparkly appearance. This lovely
piece has an array of gorgeous Purple Crystals that do have minor damage to some
of the tips and reflected in our price. It makes a beautiful display for any area of your
home or office. Another photo
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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
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$50.00 |
M507c
Here
is a new item, a very nice, above average quality Watermelon
Tourmaline from Brazil. It
measures 4" x 2 1/4" x 2" and has a gorgeous pink
and green color with a natural shiny and sparkly
appearance. Very nice!
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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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Watermelon Tourmaline
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$30.00 |
M508c This is
a very cool and interesting piece of Apophyllite from
India. It has nice clusters of gorgeous Apophyllite crystals. The eye-catching
specimen measures 5 1/4" x 3" x 1 5/8" with a very nice appearance. A unique mineral
with lots of character.
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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.
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Apophyllite
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$40.00 |
M509b Here
is a very nice specimen of Wulfenite from Mapimi in Mexico. It measures
4 3/4" x 4 3/8" x 1 1/4" and has a natural sparkly shine on
the crystals. This specimen has numerous pristine Orange/Yellow
crystals emerging from a brown and rust colored sparkly matrix. This
interesting mineral is quite fragile
and would make a fantastic
addition to your collection! Another
photo
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photo
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photo
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photo
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 Cerussite, Smithsonite, Hemimorphite, Vanadinite,
Mimetite and other minerals. Among the more notable locations for finding
Wulfenite are Pennsylvania, Arizona and Mexico.
|
Wulfenite
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$400.00 |
M510b
Here is something very different from the Mineral department at the
Rock Shed. This is a larger, above average quality Columbite or Tantalum
specimen from the Etta Mine in Keystone, South Dakota. It measures 3 3/4"
x 2 5/8" x 1 3/4" and is very heavy for it's size at over 2 1/2 pounds. It
has a dark black color and all natural rough exterior. This mineral is attached to Soda-Spar as a
secondary mineral. This is one of our rarer minerals we have on hand, so
if it sparks your interest, you will definitely have a one-of-a-kind
mineral. A really neat addition to any mineral collection.
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Columbite, also known as Niobite or Niobite-Tantalite, is a black
mineral that is an ore of Niobium and Tantalum. It has a sub-metallic
luster and a high specific gravity. It is a Niobate of Iron and Manganese
which contains Tantalate of Iron. Columbite has the same composition and
crystal symmetry as Tantalite but the latter has a much greater specific
gravity. It is used for heat resistance.
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Columbite
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$100.00 |
M511c
Here's something we haven't seen before a very rare Celestite
Orange host rock
from Boi Pau (Kyr) Turkmenia, Russia. This unique
specimen measures 3 1/2" x 2 1/2" x 1/2" and is loaded with crystals
pointing in all directions creating a dazzling display. Take note of the
last photo, it's been held up in customs since 1994 and we only just now
were able to acquire it. Very cool.
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Celestite is a mineral form of Strontium Sulfate which is a metal.
The metal is mixed with Carbon and Sulfur which is used for the red "fire"
in fireworks, flares and road signals. Celestite occurs as Crystals
and in compact massive and fibrous forms. It is mostly found in sedimentary
rocks and is often associated with Gypsum, Anhydrite and Halite. Pale
blue Crystal specimens are found in Madagascar.
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Celestite
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$80.00 |
M512b This is a very nice colorful specimen of
Aragonite from Wen Shan, Yunan, China. It has a pretty pale Green color with an
interesting plush fuzzy looking texture. It measures 3 1/4" x 1
3/8"
x 1 1/8" and is quite fragile. This is a beautiful work of nature.
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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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$60.00 |
M513b Here
is a gorgeous specimen of Azurite from Morocco.
This lovely mineral specimen has beautiful Azurite colors of Royal Blue
accented by areas of green Malachite. It measures
1 7/8" x 1 3/8" x 1" with a natural texture and
finish. Azurite can be difficult to photograph and the pictures don't do this awesome specimen justice!
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Azurite is a mineral belonging to the Carbonate group of minerals.
It is commonly found with Malachite, Goethite and Calcite. It is typically
associated with Copper deposits including Limestone which is the source of
the Carbonate.
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Azurite
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$16.00 |
M514b Here's
something we haven't seen in a while, a lovely Staurolite from Russia. It measures
1 3/8" x 1 1/8" x 1" and has not been polished. Very cool!
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Staurolite is the official state mineral of
Georgia, and is also found in Fairy Stone State Park in Virginia, US.
Staurolite often appears as two pieces which join together as a cross.
They can appear as 90 degree angle cross called a Maltese cross, or as 60
degree angle crosses, which are called St. Andrew’s Cross and look like an
“X.” Much rarer, there are staurolite which have both the 90 and the 60
degree crosses, and they resemble more a six-pointed star.
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Staurolite
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$90.00 |
M515c This is a beautiful
piece of Blue Kyanite and White Quartz from Brazil. This very nice
specimen measures 5 5/8" x 3" x 3 3/4" and has a very
pretty shaded Blue color. This specimen has lots of white Quartz
embedded in the Blue Kyanite giving the appearance an extra sparkle and
shine for extra character. This beauty is fragile and awesome work
of nature.
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Kyanite is a typically blue Silicate mineral that is commonly found
in Aluminum rich metamorphic pegmatites and/or sedimentary rock. It
is used primarily in refractory and ceramic products including porcelain plumbing
fixtures and dinnerware. It is also used in electrical insulators and
abrasives. It is definitely a collector's mineral.
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Kyanite-Quartz
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$25.00 |
M516b
Here is a beautiful
mineral specimen of Stilbite with Apophyllite from Aurangabad, India.
This lovely combination mineral has a pretty sparkly clear Apophyllite
Crystal on a bed of light peach colored Stilbite. It measures almost 4
1/4" x nearly 2 3/4almost 1 7/8" tall and has an interesting
multi-textured appearance. Very Cool!
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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.
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.
|
Stilbite Apophyllite
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$45.00 |
M518b
This is a very nice Barite crystal with Yellow Calcite specimen from South Dakota.
This piece has very well defined 1 3/4" long Honey Barite Crystal on a bed of Yellow
Calcite crystals all on matrix. It measures 1 3/4" x 1 1/2" x
nearly 1 1/2" and
has a nice natural appearance. This specimen is from Meade County of
South Dakota.
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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.
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.
|
South Dakota Barite
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$75.00 |
M519c
Here is a exceptionally nice Green Tourmaline in Albite Matrix from Brazil.
It has lots and lots of smaller sparkly dark Green colored crystals mostly
in one area. This very interesting and pretty specimen measures
5" x nearly 3 3/4" x
almost 3". Very, very nice.
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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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Green Tourmaline
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$40.00 |
M520c
Here is a exceptionally nice Quartz cluster
with lots of Goethite from China. This beautiful cluster is
loaded with crystals pointing in all directions with the Goethite imbedded
in the crystals as well as protruding without. It measures 4" x
4" x 3". Just a
gorgeous piece!
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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.
Goethite is an Iron bearing Oxide mineral found in soil and other
low temperature environments. Historically, Goethite has been used as a
paint pigment found on cave paintings in France. Its main modern use is
that of an Iron Ore content or objects using Iron Ore. Goethite is found
worldwide usually in the form of concretions, stalactitic formations,
oolites, reniform or botryoidal accumulations.
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Quartz Cluster with Goethite
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$90.00 |
M521c Here is a very nice Pyrite
specimen with octahedron shaped crystals. It
measures 3" x 2 3/8" x 2 1/2" and has a natural appearance
with tons of character with lots of sparkle and fabulous 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.
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Pyrite
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