Results 171 to 180 of about 16,702 (208)

Eastern Tourmaline

Rocks & Minerals, 1970
openaire   +1 more source

gallium tourmaline

2009
openaire   +1 more source

tourmaline alteration

2009
openaire   +1 more source

tourmaline bent

2009
openaire   +1 more source

magnesium tourmaline

2009
openaire   +1 more source

stannian tourmaline

2009
openaire   +1 more source

tourmaline pleochroism

2009
openaire   +1 more source

Colorado tourmaline

2009
openaire   +1 more source

watermelon tourmaline

2009
openaire   +1 more source

bicolor tourmaline

2009
openaire   +1 more source