Amethyst is among the most precious and valuable gemstones of the quarta movement number of minerals, with exception to rare blue-eco-friendly jewel silica. It is known as the state birthstone for that month of Feb. Amethyst goes towards the macrocrystalline branch of quarta movement and owes its purple/crimson color to iron and aluminum harmful particles. Without such coloring agents, amethyst would just be transparent, regular without color quarta movement. Like other types of macrocrystalline quarta movement, amethyst has transparent to translucent clearness along with a vitreous luster. Cryptocrystalline types of quarta movement more often than not occur with translucent to opaque clearness.
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