Jasper
Jasper is an opaque, solid or patterned variety of chalcedony and contains tiny quartz crystals that get their colour from various mineral impurities. Hardness 7 (Mohs).
Jasper is an opaque, solid or patterned variety of chalcedony and contains tiny quartz crystals that get their colour from various mineral impurities. Hardness 7 (Mohs).
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