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Tourmaline
Tourmaline
310
listings
2,329
in gallery
Market data
About Tourmaline
Formula
A
D
3
G
6
(
T
6
O
18
)(BO
3
)
3
X
3
Z
Mineral guide
Learn about Tourmaline
Tourmaline: color range and crystal variety define a diverse group; top localities, value factors, quality assessment, and care tips for collectors.
