Cut childrenite is a great rarity, and all gems are small. Cut eosphorite is more abundantly available, though both materials […]

One of the most prized ornamental materials in China, chicken-blood stone has been used for centuries to create carvings with

With light to medium dark purple colors and swirling patterns, charoite is usually quite distinctive. No other material is likely

Professionals will tell you never to trust a trade name used to describe the appearance of a fancy colored diamond.

Chambersite is an exceedingly rare mineral. Although it has properties suitable for jewelry use, its crystals occur in very small

Technically, chalcedony (kal SED’ uh nee) is any form of microcrystalline or cryptocrystalline quartz, (meaning any form of quartz whose

Although faceting chabazite isn’t too difficult, it’s too soft for jewelry. However, only a handful of cut chabazites may exist

As beautiful as a diamond, a faceted cerussite actually has higher dispersion and usually excellent transparency, colorless or light body

A little-known gem material of truly exquisite color, sky-blue ceruleite takes a very high polish easily and quickly. However, fine,

Soft, fragile, and hard to cut, celestite or celestine is seldom seen in gem collections. These gems are usually colorless