The fibrolite from Burma and Sri Lanka is well known to gem collectors, and highly prized because of its great […]

Siderite is difficult to cut, but this light brown collector’s gem has yielded faceted pieces of great beauty.

Shortite is an exceedingly rare, not overly attractive mineral. Cut gems are among the rarest of all faceted stones. The

Shattuckite is often mixed with quartz, and data often reported for properties may be erroneous. The cabochons are rich blue

The gem material known as serpentine actually encompasses several related mineral species. For millennia, people have cut serpentines into beautiful

To date, only one locality — Mont St. Hilaire, Quebec, Canada — has produced facetable serandite. These extremely rare gems

Senarmontite is a rare mineral, restricted in occurrence to the presence of antimony sulfide ores. It is much too soft

An overview on Sellaite Jewelry and Gemstones. Covers details and essential information on the physical properties and characteristics of Sellaite

With lovely colors and intense pleochroism, faceted scorodite is a prize for collectors of the rare and unusual. However, it’s

Large, faceted scheelites are among the most beautiful of all collector’s gemstones. They occur in many colors and fluoresce very