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Electrum is a naturally occurring alloy of gold and silver, with trace amounts of copper and other metals.It has also been produced artificially, and is often known as green gold.Electrum was used as early as the third millennium BCE in Old Kingdom of Egypt, sometimes as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks.

Characteristically a cryptocrystalline mineral, turquoise almost never forms single crystals, and all of its properties are highly variable. It is rare and valuable in finer grades and has been prized as a gemstone and ornamental stone for thousands of years owing to its unique hue.In recent times, turquoise has been devalued, like most other opaque gems, by the introduction onto the market of treatments, imitations, and synthetics.Soon the 1950's developed it's own definitive styles which include multi strand beaded necklaces with much larger beads than seen in the faux pearls in previous years.Lucite thermoset inserts of the '40s became the rage along with Confetti Lucite and embedded Lucite jewelry.