Albite Value, Price, and Jewelry Information
Albite, usually colorless but sometimes yellow, pink, gray or reddish. Translucent albite is sometime colored green by chrome jadeite. It is…
Peristerite Value, Price, and Jewelry Information
Peristerite is primarily oligoclase with a complex mixture of feldspars. It has iridescence that is either blue or white.
Perthite Value, Price, and Jewelry Information
Perthite is a blend of microcline, albite and oligoclase. It is usually brown and white. May have gold or white iridescence.
Sanidine Value, Price, and Jewelry Information
Sanidine is a mineral of volcanic rocks, rarely considered a gem. While occasionally brown or yellow, most examples are colorless.
Orthoclase Value, Price, and Jewelry Information
Orthoclase is best known for moonstone. It is occasionally a transparent, faceted gem.
Microcline Value, Price, and Jewelry Information
Microcline is a variety of feldspar. The only microcline you are likely to encounter is amazonite.
Feldspar Value, Price, and Jewelry Information
Feldspars are the most common minerals at the Earth’s surface. In fact, if the entire composition of the Earth’s crust were regarded as a single…
Proteus Value, Price, and Jewelry Information
A few almandine/pyrope garnets from the US will change with treatment into proteus garnets. In reflected light, they have a dark gray, metallic…
Hydrogrossular Garnet Value, Price, and Jewelry Information
Hydrogrossular differs from the other garnets in that it is never transparent. It ranges from translucent to opaque. The most common color is a…
IGS Become Member