Squash blossom necklaces made by the Zuni Indians often feature this bluish-green gem set in silver
The 
Navajo Indians of Arizona and New Mexico began making Inlay Jewelry about 30 
.... Dillon Inlayed this beautiful channel ring with old natural Blue Gem Turquoise
... [DOC] [TLE] Antique and Vintage Turquoise Jewelry - Collector Information ... [PAR] Because of its scarcity, this beautiful blue turquoise is no longer mined in Iran, 
and so antique Persian turquoise jewelry, often carved and inlaid with gold, is 
extremely ... span from China blue to deep blue, and from blue-green to yellowy 
green.