Colorado Gem & Mineral Co. - Rocks for the Rest of Us

Minerals A - G


Minerals A - G Description


Cerussite with Barite on Galena

a46 - Cerussite with Barite on Galena

Galena base covered with brilliant Cerussites with interesting growth faces and some bundles of pink..

$225.00
Cerussite with Barite on Galena

9980 - Cerussite with Barite on Galena

Galena base with peach-colored Barite and brilliant Cerussite crystals in aesthetic composition...

$90.00
Cerussite with Galena on Barite

9774 - Cerussite with Galena on Barite

Well-formed Cerrusite crystals on druzy Galena, with Barite.   posted..

$45.00
Cerussite with Galena on Barite

9805 - Cerussite with Galena on Barite

Brilliant Cerussite crystals with Galena, on white Barite matrix...

$95.00
Chabazite on Smoky Quartz

5278 - Chabazite on Smoky Quartz

A very rare occurence of a zeolite on smoky quartz. The piece on the other side is a very aesthetic ..

$265.00
Chalcocite on Pyrite

b164 - Chalcocite on Pyrite

Brilliant Pyrite cluster with numerous, well-formed Chalcite (CuS2) crystals up to 5 mm in size.   C..

$110.00
Chalcocite on Pyrite

b172 - Chalcocite on Pyrite

Numerous well formed Chalcocite crystals on brilliant Pyrite.  Chalcocite is rare in crystals, usual..

$95.00
Chalcopyrite on Red Quartz

a858 - Chalcopyrite on Red Quartz

Well-formed crystals of Chalcopyrite on rounded group of Red Quartz crystals from the famous Butte, ..

$135.00
Chalcopyrite with Quartz , Sphalerite and Pyrite

a148 - Chalcopyrite with Quartz , Sphalerite and Pyrite

Brilliant Chalchopyrite crystal with needle-like Quartz, striated Pyrite and some terminated Sphaler..

$115.00
Chrysoberyl / Alexandrite

a942 - Chrysoberyl / Alexandrite

Disc shaped cyclic twin of Chrysoberyl, well formed, with deep green color.  Shows red on edges in s..

$95.00
Chrysoberyl in Biotite

a865 - Chrysoberyl in Biotite

Tabular, twinned Chrysobryl crystal with nice, greenish-yellow color, in Muscovite matrix.   ..

$110.00
Chrysocolla ( Polished )

A34 - Chrysocolla ( Polished )

Polished specimen of Chrysocolla and Malachite, with whimsical resemblance to an animals face...

$55.00
Chrysocolla ( Polished )

a35 - Chrysocolla ( Polished )

Deep-blue polished Chrysocolla...

$40.00
Cinnabar

a831 - Cinnabar

Vivid red Cinnabar crystals aesthetically arranged on a plate of white Quartz...

$245.00
Cinnabar

a825 - Cinnabar

Brilliant, bright-red Cinnabar crystals in white Calcite...

$110.00
Cinnabar with Quartz

a824 - Cinnabar with Quartz

Bright red Cinnabar crystals perched with a terminated Quartz crystal...

$185.00
Clinozoisite

b496 - Clinozoisite

Extremely-rare, brilliant, gemmy crystal of Clinozoisite.   DW..

$185.00
Clinozoisite

a724 - Clinozoisite

Large, gemmy crystal of Clinozoisite with beautiful green and pink color.   This is the best example..

$325.00
Columbite / Niobite

b343 - Columbite / Niobite

Well-formed, doubly-terminated Columbite / Niobite crystal, the main source for two of the rare eart..

$185.00
Columbite / Niobite

b317 - Columbite / Niobite

Aesthetic pair of terminated Columbite / Niobite crystals.   DW..

$95.00
Columbite / Niobite

5827 - Columbite / Niobite

Very sharp Columbite / Niobite crystal, a rare earth oxide mined for Columbium and Tantalum.  Excell..

$395.00
Columbite / Niobite

a777 - Columbite / Niobite

Complete crystal of Columbite / Niobite, the main source for two of the rare earths, Niobium  and Ta..

$245.00
Copper with Malachite coating

b465 - Copper with Malachite coating

Well formed crystals of Copper covered with Malachite  in arborescent growth of flattened and deform..

$80.00
Copper, Native with Malachite coating and Gold

b421 - Copper, Native with Malachite coating and Gold

Outstanding double arborescent growth of deformed and flattened copper crystals, three-dimensional a..

$125.00
Coquimbite

b591 - Coquimbite

Polyhedron group of Coquimbite crystals.   Hexagon shaped formation of an evaporite mineral.   ..

$45.00
Coral

6665 - Coral

Natural, bright-red coral from the Mediterranean.   DW..

$55.00
Cuprite

b524 - Cuprite

Sharp, well-formed Cuprite crystals with great brilliance.   Classic.   DW..

$185.00
Cuprite

9326 - Cuprite

Group of sharp octahedrons, largest one 1 inch!..

$110.00
Cuprite

a823 - Cuprite

Sharp, brilliant Cuprite crystals with excellent form.   Rare and aesthetic.   DW..

$255.00
Cylindrite

b308 - Cylindrite

Brilliant mass of well-formed Cylindrite crystals.  This rare lead-tin sulfosalt is one of the o..

$85.00
Cylindrite

9869 - Cylindrite

Solid mass of Cylindrite crystals. This rare lead-tin sulfosalt is one of the only cylindrical m..

$125.00
Cylindrite

a341 - Cylindrite

Massive ore showing over a hundred Cylindrite crystals.   Cylindrite is the only mineral that forms ..

$145.00
Danburite with Citrine and Calcite

b314 - Danburite with Citrine and Calcite

Well-formed Danburite crystal with deep-orange Citrine crystals perched atop.   Some colorless Calci..

$40.00
Dioptase

a740 - Dioptase

Large, prismatic Dioptase crystal aesthetically perched on contrasting brown matrix...

$65.00
Dioptase

a746 - Dioptase

Beautiful, well-formed Dioptase crystals aesthetically spread on matrix.  Add some color to your col..

$225.00
Dioptase

a738 - Dioptase

Beautiful, blue-green Dioptase crystals aesthetically spread on Quartz matrix...

$185.00
Dioptase

a757 - Dioptase

Aesthetic, well-formed Dioptase crystals arranged on all sides of Quartz matrix.   Very aesthetic, e..

$225.00
Dioptase

8594 - Dioptase

Prismatic and brilliant Dioptase crystals lining a small vug, great composition...

$95.00
Dioptase

9397 - Dioptase

Excellent specimen of brilliant Dioptase crystals, on clear Calcite.   Very aesthetic. ..

$245.00
Dioptase

9194 - Dioptase

Quartz breccia covered with brilliant, Emerald-green Dioptase crystals on all sides.    DW..

$95.00
Dolomite after Aragonite ( Pseudomorph )

9894 - Dolomite after Aragonite ( Pseudomorph )

Beautiful Dolomite pseudomorph of Aragonite crystal cluster...

$75.00
Dolomite after Aragonite ( Pseudomorph )

9892 - Dolomite after Aragonite ( Pseudomorph )

Dolomite pseudomorph of Aragonite crystal cluster...

$65.00
Dolomite after Aragonite ( Pseudomorph )

9890 - Dolomite after Aragonite ( Pseudomorph )

Very interesting Dolomite pseudomorph of Aragonite crystals displaying multiple penetrations...

$70.00
Dolomite after Aragonite ( Pseudomorph )

9891 - Dolomite after Aragonite ( Pseudomorph )

Dolomite replacement of Aragonite crystal with unusual geometry...

$65.00
Dolomite after Aragonite ( Pseudomorph )

9885 - Dolomite after Aragonite ( Pseudomorph )

Dolomite replacement of Aragonite crystal cluster...

$75.00
Dolomite after Aragonite ( Pseudomorph )

8604 - Dolomite after Aragonite ( Pseudomorph )

Dolomite pseudomorph of sharp Aragonite crystal...

$65.00
Dolomite after Aragonite ( Pseudomorph )

8606 - Dolomite after Aragonite ( Pseudomorph )

Dolomite pseudomorph of Aragonite with complex geometry...

$70.00
Dolomite after Aragonite ( Pseudomorph )

8601 - Dolomite after Aragonite ( Pseudomorph )

Dolomite replacement of Aragonite crystal with very sharp form...

$85.00
Dolomite after Aragonite (Pseudomorph)

8602 - Dolomite after Aragonite (Pseudomorph)

Dolomite replacement of a well formed Aragonite crystal.  Found in a shale layer in Chavez Cnty. New..

$40.00
Dolomite after Aragonite (Pseudomorph)

8605 - Dolomite after Aragonite (Pseudomorph)

Extremely well formed pseudomorph of Dolomite after Aragonite.  Recently found in a layer of shale i..

$95.00
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