A few almandine/pyrope garnets from the US will change with treatment into proteus garnets. In reflected light, they have a […]

Prosopite is usually a nondescript mineral with no gem significance. However, beautiful blue specimens are sometimes cut for jewelry.

Prehnite is popular as a cabochon material among hobbyists because of its lovely green and blue-green to yellow colors. Completely

Prehnite is popular as a cabochon material among hobbyists because of its lovely green and blue-green to yellow colors. Completely

An overview on Powellite Jewelry and Gems. Covers details and essential information on the physical properties and characteristics of Powellite

Colorless pollucites lack fire when cut and are usually small. However, this very rare cesium mineral is a coveted collector’s

Pink diamond is one of nature’s rarest beauties. Often found in small quantities and typically under one carat, these incredible

Renowned for its delicate blue-green shades, phosphophyllite’s beauty is enhanced by expert cutting. Unfortunately, this gem is quite fragile and

Rare phosgenite typically shows pale colors. This material is difficult to cut and too soft for jewelry wear. However, its

Rare phenakite is a very hard gem material suitable for jewelry. Usually colorless, cut stones have little fire but can