Turquoise – Natural, Cabochon, Blue
Turquoise is an idiochromatic gem. This means it derives its color from essential components of its chemical formula. The combination of copper…
Saltwater Pearl – Natural, Rough, Black
14k white gold ring with a Tahitian pearl in an arch setting. © Urth Kandi Jewelry. Used with permission.
Freshwater Pearl – Natural, Rough, Pink
Many ring designers will encase the pearl in a beautiful spiral cage. Pink freshwater pearl in 14k rose gold cage with diamonds. © Urth Kandi Jewelry.…
Rubellite – Natural, Faceted, Red, 14 ct
Channel settings may even work well with larger gemstones. Both 7-ct rubellites and 3 small diamonds are protected by channel settings in this…
Amethyst – Natural, Cabochon, Purple
Victorian-style sterling silver ring with bezel-set amethyst cabochon. Jewelry and photo by Nana Louise Nielsen. Licensed under CC By 2.0.
Glass – Lab-made, Bead, Blue
Archeologists discovered this model broad collar in the wrappings of the mummified steward Hapiankhtifi. Museum workers restrung it. Blue-green…
Diamond – Natural, Faceted, Colorless, 0.5 ct
18k yellow gold ring with garnet center stone and 0.5-ctw baguette-cut diamond accents, F color, VS clarity. Photo courtesy of liveauctioneers.com…
Amethyst – Natural, Faceted, Purple
Amethyst ring. Photo by derrico_jewelry. Licensed under CC By-SA 2.0.
Leucite – Natural, Rough, White
If exposed to the air and other elements, leucite can pseudomorph (change chemistry without changing shape) into pseudoleucite, a combination…
IGS Become Member