‘‘It is not about color,’’ said Joe Dan Lowry, co-author of ‘‘Turquoise: The World Story of a Fascinating Gemstone ... It is light blue to dark blue in color, with a ...

Turquoise blue has even been added to the color wheel between violet and green since the robin-egg-blue of good turquoise is quite pronounced even though the gemstone ... A light blue was made ...

Forbes contributors publish independent expert analyses and insights. I am the founder of La Patiala, the luxury encyclopedia. Turquoise is one of December’s birthstones — the other December ...

But what makes a good turquoise stone? The answer is not always ... Other cases contained light-to-intense selections of green, green-blue and blue-green. Their idea is that someone could compare ...

This fine stone powder absorbs the shortest wavelengths of light — the purples and indigos — and reflects mainly light-blue and green light back to the surface, giving the water a turquoise tint.

Sacred to Indigenous people, beloved by collectors, one blue-green stone has huge cultural cachet in the “Land of Enchantment.” Indigenous artisans in New Mexico are known for their turquoise ...

Coral with accents of opal, sugilite, lapis lazuli, Orvil Jack turquoise, 14-karat gold, silver. Collection of Leota and Phil Knight. Photographer: Sam Franks A sky-blue colored stone with a gray ...