Collectible
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| Aragonite | A mineral form of crystalline calcium carbonate;
dimorphic with calcite. |
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| Azurite | A deep blue semiprecious stone that is composed of hydrated copper carbonate. | ||
| Barite | A yellow, white, or colorless crystalline mineral of barium sulfate, that is the chief source of barium chemicals. | ||
| Calcite | Calcite is a common mineral consisting of crystallized
calcium carbonate, a major constituent of limestone. |
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| Cinnabar | A heavy reddish mineral consisting of mercuric sulfide;
the chief source of mercury. |
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| Epidote | A mineral, commonly of a yellowish green (pistachio)
color, occurring granular, massive, columnar, and in monoclinic crystals.
It is a silicate of alumina, lime, and oxide of iron, or manganese.
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| Fluorite | A soft mineral (calcium fluoride) that is fluorescent in ultraviolet
light. It is the chief source of fluorine. |
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| Orpiment | A yellow mineral occuring in conjunction with realgar;
an ore of arsenic. |
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| Pyrite | A very common brass-yellow mineral, iron disulfide, with a metallic luster, burned to sulfur dioxide in the manufacture of sulfuric acid: chemically similar to marcasite, but crystallizing in the isometric system. | ||
| Realgar | A rare soft orange mineral consisting of arsenic sulphide; an important
ore of arsenic. |
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| Sphalerite | An ore that is the chief source of zinc; consists
largely of zinc sulfide in crystalline form. |
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| Stalactite | A cylinder of calcium carbonate hanging from the roof of a limestone cave. | ||
| Stalagmite | A cylinder of calcium carbonate projecting upward from the floor of a limestone cave. | ||
| Stibnite | A mineral that consists of the trisulfide of antimony and occurs in orthorhombic lead-gray crystals of metallic luster or in massive form. | ||
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