Refractive Index: The refractive index of amethyst is around 1.54 to 1.55, meaning that light bends slightly as it passes through the crystal.Specific Gravity: The specific gravity of amethyst is around 2.65, meaning that it is slightly denser than water.Luster: Amethyst has a vitreous (glassy) luster, which gives it a bright and shiny appearance. ![]()
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