Star Garnet is a type of garnet gemstone that exhibits a unique asterism or star effect when viewed under a single light source. It is typically found in sizes ranging from 8 to 25 mm and has an oval shape. The star effect is caused by the presence of tiny needle-like inclusions of rutile within the crystal structure of the garnet. Star Garnet is primarily found in the United States, especially in the state of Idaho, and is used as a precious gemstone in jewelry.
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