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Mica is a mineral name given to a group of minerals that are physically and chemically similar
Gem Silica occurs in a vivid blue green color due to the presence of copper in the stone and is free of inclusions of other minerals
mother of pearl
and forms within a host rock such as ironstone or sandstone
It is considered a precious Opal
Light Amethyst 9x11-13x18mm Free Form Faceted Oval A Grade - 15-16 Inch Sauterne Mica is a mineral nameAmethyst 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
