Adventurine: Adventurine belongs to the quartz family. The quartz family
is very large, with an enormous variety of gemstone material in every color
of the spectrum. Quartz is comprised primarily of silica and is formed when
silica-bearing solutions infiltrate porous rocks and sediments. The silica
then becomes impregnated into the porous rock and changes the rock into what
we call quartz. Adventurine is green in color.
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