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Gemstones
Crystal
see also Mineral (chemistry)
specific gems
alternative medicine employing gemstones
carat as unit of measure
identification and characteristics of gemstones
jewelry and art
largest cut gemstone in world
optics and optical properties of gemstones
pictures
polishing gemstones
quotations
seals
Crystal (mineral)
Crystal (mineral)
, homogeneous portion of matter that has a definite, orderly atomic structure, and an outward form bounded by smooth, plane surfaces,...
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