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Opal is a natural gemstone made from silica mineral and 90% are found in Australia
a Venetian monk tipped molten copper into a vat of molten glass
gray and black
golden tan
Amethyst 6mm Star Cut Coin A Grade - 15-16 Inch 7x13mm Opal is a natural gemstoneAmethyst is a beautiful purple stone, known as a Gem of Fire by ancient cultures. It has been greatly sought after throughout history and was at times valued as highly as Diamond. Today, this semi to precious variety of quartz is found in many locations around the world. The presence of Manganese within the stone produces the purple hue, and variation of the amount of iron in the stone creates a color range from reddish purple to deep violet to light