Tourmaline
Tourmalines may occur in pink, red, yellow, blue, brown, black or green. The hardness is 7 to 7.5 on the Mohs scale.
Back to GlossaryTourmalines may occur in pink, red, yellow, blue, brown, black or green. The hardness is 7 to 7.5 on the Mohs scale.
Back to Glossary