Minerals from Different Locations

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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

$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

$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

$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

$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.

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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.

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Smoky Rutilated Quartz Crystal

$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

$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.

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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

$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

$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

$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!

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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 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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Wulfenite

$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.

fluorite

Columbite

$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
 


$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

$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


$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


$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


$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.

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Stilbite Apophyllite

$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.

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South Dakota Barite

$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.

mineral

Green Tourmaline
 

$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
 

$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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