Share the post "BLUE GEM 134 – Vintage 1960’s Blue Gem turquoise 3- stone ring"
Blue Gem turquoise is a rare, valuable and historic American treasure. Quality Blue Gem Turquoise has been gifted with a wide range and variety of color, from a beautiful sky blue to an aqua blue-green, not unlike parts of the Mediterranean Sea. Because Blue Gem turquoise is very hard, a high polish is associated with this stone, and unlike most turquoise, it won’t easily change color. This turquoise has a unique character and many different looks all of which are striking, full of wonder and pleasing to the eye.
Production of the mine started about 1934 and continued into the 1970’s. Blue Gem Turquoise is still some of the finest turquoise ever found, and unlike most turquoise mines, (in which the majority mined is chalky and only usable if stabilized) most of the turquoise found there was of gem-quality.The original Battle Mountain blue Gem Mine no longer produces turquoise, although numerous other mines in the area now carry the same name. The only true old Blue Gem turquoise available today is through old collections.
Is an alloy of silver containing 92.5% by weight of silver and 7.5% by weight of other metals, usually copper. The sterling silver standard has a minimum millesimal fineness of 925.
SILVER, for example 99.9% pure silver, is relatively soft, so silver is usually alloyed with copper to increase its hardness and strength. Sterling silver is prone to tarnishing, and elements other than copper can be used in alloys to reduce tarnishing, as well as casting porosity and fire scale. Such elements include germanium, zinc, platinum, silicon, and boron. Recent examples of alloys using these metals include argentium, sterlium, sterilite and silvadium.