lapis lazuli

Lazulite makes a magnificent, deep blue gemstone. Although the mineral itself occurs widely, gem-quality rough is limited. Specimens are prized…

One of the major mineral constituents of lapis lazuli, haüyne is rarely found and faceted as a distinct gemstone. Collectors prize its beautiful,…

Sporting a deep green color that features complex banding and swirling patterns, malachite easily ranks as one of the most recognizable gemstone…

Imagine holding a diamond that sparkles with brilliant flashes of light, each tiny surface reflecting and refracting light in perfect harmony.…

Discover the ancient art of faceting – how rough stones become brilliant gems through 3,000 years of cutting techniques. Learn about cabochons…

Gemstone engraving creates tiny but charming works of art. The symbols, decorations, and even magic formulas carved into stones have fascinated…

Distinguishing natural from synthetic gems is a critical skill for gemologists. It could mean the difference between valuing a gemstone at thousands…

The optical properties of minerals attract our eyes and can give a specimen a unique character. However, mineral physical properties are also…

Although gemstone magnetism isn’t a commonly tested gemstone property, it may be useful for making quick separations outside the lab. By Richard…