Results 191 to 200 of about 16,702 (208)

tourmaline imitation

2009
openaire   +1 more source

Tourmaline group

2011
openaire   +1 more source

zincian tourmaline

2009
openaire   +1 more source

African tourmaline

2009
openaire   +1 more source

tourmaline dichroism

2009
openaire   +1 more source

Tourmaline Whiskers

Rocks & Minerals, 1964
openaire   +1 more source

multicolored tourmaline

2009
openaire   +1 more source

red tourmaline

2009
openaire   +2 more sources

tourmaline tongs

2009
openaire   +1 more source

black tourmaline

2009
openaire   +1 more source