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Our opal come primarily from Australia as this country produces the finest and most durable opals on the planet. White base is as its name states is milky white body color to clear which is known as crystal opal. Black opals are dark body color from grey to black. Blacks are the most valuable and most durable. There are also opal doublets both natural and assembled which are a thin seem of opal with ironstone backing. Opal
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