Sapphire

Detailed information for any gemstone you are interested in.

The Mohs hardness scale measures a mineral’s resistance to scratching. Find the traditional scale here and a chart of select gems ordered by hardness.…

Although long known best for being misidentified as ruby, the spinel gem is beautiful in its own right. Its colors, durability, and relative affordability…

Gemology is both art and science. Learn how identifying gemstones combines traditional testing techniques, modern software, and deductive…

Considering buying gems in Afghanistan? Learn which Afghan gemstones to seek out, which to avoid, and prepare for a “buyer beware” experience.…

Learn essential ruby buying tips from experts. Discover how to evaluate color, clarity, cut & carat weight. Avoid synthetic stones & treatments.…

Next to diamond, corundum is the hardest mineral known and is very compact and dense, with no cleavage. As a result, corundum is one of the best of…

Some opals from Spencer, Idaho show asterism or the “star stone” effect. Learn how to price these beautiful but rare star opals.

We specialize in fine Faceted gems and Rough gemstones imported directly from our site holders and collectors in Africa and other world-wide locations.…