MN414 – Richard D. Little Geology Collection

Sample ID MN414 • Cabinet F

Dravite Tourmaline

6.971cm W x 5.256cm H x 3.453cm D • 122g

Sample Type	Mineral	Color	Brown to black	Luster	Vitreous
Streak	Colorless	Cleavage/Fracture	Distinct/uneven to Conchoidal	Specific Gravity	2.541
Geographic Location/Date	NA	Mohs Hardness	6

Two brown to black prismatic crystals that are penetrating twins. Formed in Metamorphic granite pegmatite. One side is mostly tourmaline and the other is mostly rock base.