Tugtupite – Natural, Specimen, Purple
Collectors prize tugtupite, found in Greenland, for its intense displays of gemstone luminescence under UV light. Photo by Géry Parent. Licensed…
Garnet – Natural, Faceted, Brown
“Garnet Ring” by Paul the Jewelry Artist is licensed under CC By-ND 2.0. (Cropped to show detail).
Opal Stone – Assembled, Cabochon, Brown
Opal doublets and triplets make use of opal too thin to use as a solid gemstone. A thin layer of precious opal is glued to a black base, usually common…
Covellite – Natural, Specimen, Purple
Some minerals, like this covellite crystal on display at the Montana Bureau of Mines and Geology Mineral Museum, are very attractive but too soft…
Topaz – Natural, Specimen, Colorless
A cluster of seven gem-quality topaz crystals attached to their feldspar matrix. You could facet these gemstones. But would you? © Rob Lavinsky,…
Rose Quartz – Natural, Cabochon, Pink
Needle-like rutile inclusions in rose quartz can create a star effect. When cut as cabochons, like this huge 1,438.5-ct specimen, rose quartz…
Diamond – Natural, Faceted, Colorless, 1.05 ct
Platinum is durable, resistant to corrosion, rare, and expensive. Platinum jewelry is in high demand for marking significant life events. Platinum’s…
Diamond – Natural, Faceted, Blue, 2.56 ct
Custom-cut gemstones don’t fit into the mass-production process, but they do fit into unique jewelry designs. This hand-made platinum ring…
Emerald – Lab-made, Faceted, Green
Synthetic emerald jewelry. Photo by Deidre Woollard. Licensed under CC By 2.0. (Cropped to show detail).
IGS Become Member