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Max 55% OFF gemhub Loose Kansas City Mall Gemstone Round Shape 6 Sapphire Rays Star for Blue

gemhub Loose Gemstone Round Shape 6 Rays Blue Star Sapphire for

$10

gemhub Loose Gemstone Round Shape 6 Rays Blue Star Sapphire for

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Product description

Some rare natural sapphires exhibit a star-like phenomenon known as asterism. These gems contain intersecting needle-like inclusions (often the mineral rutile, a mineral composed primarily of titanium dioxide) that cause the appearance of a six-rayed star when viewed with a single overhead light source. To cause a star, the rutile needles need to form in parallel and tightly packed groups. The reflection off of each group of crystals forms a straight line that appears to float on the surface of the stone. There are always three groups of crystals that intersect at 60-degree angles from each other. The three lines formed connect in the center to form the appearance of a 6 ray star. The presence of a star is one of the more remarkable phenomena encountered in the world of colored gemstones. This optical phenomenon is quite rare, being only found in a tiny percentage of the sapphires mined around the world. Star sapphires can occur in any color, but the most common colors are blue, black, and pink.

gemhub Loose Gemstone Round Shape 6 Rays Blue Star Sapphire for

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