A unique variety of sapphire exists which stands apart from the faceted gemstones that are commonly cut from sapphire crystals: this variety is known as “ star sapphire”. Sapphires have been valued by numerous civilizations for countless millennia, and to this day sapphires continue to be highly desirable gemstones.
Al 2 O 3 w/ TiO 4, Fe 2 O 3, and/or FeTiO 3
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