Blue crystal mineral under ultraviolet irradiation
Kyanite crystals on matrix are a common mineral combination commonly found in metamorphic rocks. Blue sapphire is an aluminosilicate mineral with unique blue or blue-green crystals, commonly used in gemstones and industrial applications. The chemical formula of kyanite is Al ₂ SiO ₅, with a color range from light blue to dark blue, sometimes appearing green or gray. The crystal is usually in the shape of long columns or blades, with obvious cleavage planes. Blue spar is usually formed in high-pressure and low-temperature metamorphic environments, commonly found in gneiss and schist.
Blue crystal
Kyanite crystals on matrix are a common mineral combination commonly found in metamorphic rocks. Blue sapphire is an aluminosilicate mineral with unique blue or blue-green crystals, commonly used in gemstones and industrial applications. The chemical formula of kyanite is Al ₂ SiO ₅, with a color range from light blue to dark blue, sometimes appearing green or gray. The crystal is usually in the shape of long columns or blades, with obvious cleavage planes. Blue spar is usually formed in high-pressure and low-temperature metamorphic environments, commonly found in gneiss and schist.
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