Minerals from Different Locations

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M400c   This is something different for the mineral collector.  Here is an above average quality specimen of Sphalerite.  The unusual mineral measures 4 5/8" x 2 1/4" x 1 3/4" and has an unusual shape with a very shiny appearance.

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Sphalerite is a mineral that is the chief ore of Zinc.  It consists mainly of Zinc Sulfide in crystalline form but almost always contains valuable Iron.  When the Iron content is high, it is an opaque black variety called Marmatite.  It is usually found in association with Galena, Pyrite, Calcite, Dolomite and Fluorite.  It is usually yellow, brown or gray to gray-black in color and may have a shiny or dull luster or sheen.

Sphalerite

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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.

Copper-Quartz

M402b  This is a very nice light Lavender Amethyst Cactus Quartz Crystal.  The lovely Crystal cluster measures 1 1/2" x over 1 1/4" x almost 1 1/2" tall and has not been polished.  This gorgeous specimen is from the Magaliesberg Mountains west of Pretoria, South Africa.  It does have dings on the tip and is reflected in our price.  A true beauty indeed!

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These 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

M403b  This is a beautiful combination specimen of Barite and Tourmaline from Pakistan.  This outstanding specimen has the shiny black Tourmaline that measures over 2 7/8" long x over 3/4" x 5/8" and has lovely milky White Barite attached.  The pretty White Barite is 1 7/8" x 2 1/2" and together are mounted in a plastic display box that is 2 1/4" x 2 1/4" x 3 1/4".   The black and white colors of this specimen make it hard to photograph to properly show the wonderful character.  Just a fabulous and unusual combination specimen that makes an extraordinary addition to your collection.

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Barite is a mineral consisting of Barium sulfate and is generally white or colorless.  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.

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).  This mineral is found in igneous rocks, like Granite Pegmatite, and metamorphic rocks such as Schist and Marble.

Barite-Tourmaline

M404b  Here is something different for the mineral collector.  This is a very unique and rare specimen of multi-colored Bismuth.  The interesting specimen measures nearly 2" x over 1 3/4" x 2" tall.  It has a colorful, shiny appearance and a lots of unique character.  A very cool mineral.

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Bismuth is a native element but native crystals are extremely rare. Peru is one of the world's major sources. These crystals are grown in laboratories in the United States. Bismuth is scarce as Silver, heavier than Lead and is classified as a semi-precious semi-metal. It is non-toxic to humans. It is used in medicine and cosmetics, applications in inks, paints, free-machining steels and fire sprinklers.

Bismuth

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Crystals of Sulfur are usually yellow to yellowish-brown blocky dipyramids. Also it is found more typically as powdery yellow coatings. Native Sulphur is usually formed from volcanic action - as a sublimate from volcanic gasses associated with Realgar, cinnabar and other minerals. It is  found in some vein deposits as an alteration product of sulfide minerals.

Sulfur

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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. 

Pyrite

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Gibbsite is one of the mineral forms of aluminum hydroxide and also sometimes called hydrargillite.  Gibbsite is an important ore of Aluminum in that it is one of three main phases that make up the rock Bauxite.  Gibbsite is a secondary mineral mainly of tropical and subtropical occurence.  Named by John Torrey in 1822 in honor of Colonel George Gibbs, a wealthy import merchant who was a geologist and mineralogist.  Notable occurrences include Brazil, Central Africa, Germany, Hungary, France, Guyana and USA (mainly Alaska).

Gibbsite

M408c  Here is something different for the mineral collector.  This is an extremely nice, well formed Creedite crystal cluster cluster floater from Chihuahua, Mexico.  This rarer mineral has an interesting acicular radiating spray of fine Burnt Orange prisms with Fluorite along one side and lots of character.  It measures nearly 3 7/8" x 2 7/8" x over 2" and has a natural texture and finish.   Very, very nice!

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 Creedite is a rare hydroxylhalide mineral that formed from the oxidation of fluorite ore deposits.  It ranges in color from colorless, white, violet to orange.  Creedite gets it's name from Creede Quadrangle Colorado where it was first found 1916.  It was later also found in Nevada, California and Chihuahua, Mexico.  Other world locations are in Eastern Europe in Tajikistan and Kazakhstan.

Creedite

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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.

Wulfenite

M410b  This is a new item and a very nice piece of Eudialyte from Russia.  It has vibrant Pink colors accented by Black, White and a Dark Red. The black material is Tourmaline and the white material either calcite or quartz. The colorful specimen measures nearly 1 7/8" x 1 3/4" x almost 1 1/4".  This unique specimen makes an excellent display of rare mineral or a wonderful addition to your collection.  

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Eudialyte, also spelled Eudialite,  is a complex material  consisting chiefly of the silicates of iron, zirconium, and lime. Some samples of Eudialyte have been found to have up to 46 different elements.  The zirconium has many uses from the production of synthetic fibers, in construction materials for aircraft and space vehicles and in the manufacture of super-hard alloys.  Eudialyte is found in Arkansas, Greenland, Russia, Norway, Canada and Madagascar.

Eudialyte

M411c   Here is a different item, a very nice Selenite Rose from Eastern South Dakota where they are not generally found.  This very cool rose measures 3 1/4" x nearly 2 3/4" x over 2 1/4" and has a warm yellowish, nearly clear appearance on the many different "petals".   This is an astonishing work of nature and very fragile.  This unique specimen came from an old collection and has not been available for years and years.

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Selenite, also known as Satin Spar, Desert Rose and Gypsum Flower, is a variety of Crystalline Gypsum.  Gypsum is a very soft mineral composed of Calcium Sulfate.  Gypsum Flowers are rosette shaped Gypsum with spreading fibers and can include an outer druze of sand or with sand throughout.  The difference between Desert Roses and Gypsum Flowers is that Desert Roses look like roses, whereas, gypsum flowers are a myriad of shapes.

SD Selenite Rose

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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.

Apophyllite

M413b  Here is a gorgeous combination specimen of Azurite and Malachite on matrix from Morocco.   This lovely mineral specimen has beautiful Azurite colors of Dark Blue accented by various greens of Malachite in different places.  It measures nearly 2 3/4" x 1 7/8" x almost 1 1/4" 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.

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.

Azurite Malachite

M414b  Here is an interesting and rare mineral.  This is a good sized, very nicely detailed Libyan Desert Glass specimen.  This compelling specimen has an unique design with the pale Creamy Yellow color accented by an unique shape.  It measures nearly 1 3/4" x almost 1 3/8" x nearly 1 1/8" and has a natural finish.  Very nice.

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Glass is a hard brittle substance, typically transparent or translucent, made by fusing sand with soda, lime and sometimes other ingredients and cooling rapidly. Libyan desert glass or great sand sea glass is a substance found in areas in the Libyan Desert. Fragments of desert glass can be found over large areas, up to tens of kilometers. The Libyan desert glass has been dated as having formed about 26 million years ago. It was knapped and used to make tools during the Pleistocene. Today's glass is used to make windows, drinking containers and many other articles.

Libyan Desert Glass

M415c  This is a very different and pretty specimen of a gorgeous vibrant Blue Cavansite Crystal on matrix. This unique and rare specimen measures nearly 2 5/8" x almost 2 1/2" x 2 1/8" and would be a good addition to any collection. This material is from Pune, India.  Very nice.

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Cavansite is a deep blue hydrous calcium vanadium phyllosilicate mineral, occurring as a secondary mineral in variety of zeolite minerals. 

Cavansite

M416c  Here is a very nice Blue Barite specimen from Stoneham, Weld County in Colorado.  This interesting specimen measures 3/4" x nearly 1/2" x 1/8" thick and has a sparkly light Blue color with good clarity.   The specimen is mounted in a plastic display box that measures 1 1/4" square x 1 3/8" tall.  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.

Blue Barite

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Lapis is a stone with a long tradition of being considered a gem.  It is usually deep blue in color and is opaque.  It is a rock and not a mineral as it is made up from various other minerals.  The main component is Lazurite which is a Feldspar Silicate.  Lapis may also contain Calcite, Sodalite and Pyrite.  It is found worldwide.

Lapis

M418c  Here is a very pretty Stilbite specimen.  It has a super appearance with the awesome peach colored Stilbite sheaves all over the top side of the matrix.  This amazing mineral measures 3 3/4" x 4 1/2" x 2 1/2" and is from Jalgaon, India. A great way to begin your mineral collection!!

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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

M419b  This is a very different and pretty specimen of a rare Zincite crystal.  The synthetic crystal is darker reddish orange color and is 2 1/8" long x 3/16" in diameter at it's base.  This unique and rare specimen is in a plastic display box measuring 1 1/8" square x 2 1/8" tall and would be a unique addition to any collection.  

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Natural Zincite is rare and found only in few location in the world other than the famous zinc and manganese mines of Sterling Hill and Franklin, New Jersey.  Synthetic Zincite crystals were formed by accident in a zinc manufacturing facility in Poland and now are grown artificially as a by-product of zinc smelting.  The crystals can be colorless or range from dark red, orange or yellow to light green.  

Zincite

M420c  Here is a very nice, above average quality Feldspar, Garnet and Tourmaline specimen from the Black Hills of South Dakota.  The numerous Garnets of different sizes are scattered about and have a nice natural color.  There are Black Tourmaline crystals scattered about in the Feldspar matrix rock.  There is some Mica mixed in as well.  The interesting specimen measures almost 4 7/8" x 3 1/4" x nearly 2 3/4" and has a natural unique appearance.  Very nice!

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Garnet is included in a group of minerals that have been used since the Bronze Age as gemstones and abrasives.  Garnets are most often as seen in red, but are available in a wide variety of colors spanning the entire color spectrum except blue.  There are six common species of Garnet that are recognized by their chemical composition:  Pyrope, Almandine, Spessartite, Grossular, which includes Hessonite and Tsavorite, Uvarovite and Andradite.

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.

Garnet - Tourmaline - Felspar