Calcite is an extremely soft mineral (Mohs 3.0) that is never used in jewelry. It is strictly a collector's gem that is occasionally found in museums in faceted form. Most gem cutters would rather have a root canal than try and facet a piece of calcite. This mineral is so soft that it is difficult to obtain a good polish. When a fine polish is obtained, a faceted calcite is actually quite attractive. Calcite also shows strong double refraction. Can you note two sets of facet junctions in the above image? Because of the particular way that the calcium carbonate molecules pack in a calcite crystal, light is split and travels in separate paths. One point/facet junction on the bottom of the gem looks like two. Few other gem materials will show this degree of doubling. Most calcite crystals are colorless, but the material also occurs in rose and golden hues. This expertly crafted gemstone shows excellent clarity and scintillation. It would be a rare and fine additon to any gemstone collection.

Return to inventory list