putnisite

English

Etymology

Putnis +‎ -ite, from the name of the discoverers, mineralogists Andrew and Christine Putnis.

Noun

putnisite (uncountable)

1. A quartz-like mineral, purple in colour, naturally occurring brittle crystals smaller than 0.5 mm, with an orthorhombic crystalline matrix of SrCa₄Cr³⁺₈(CO₃)₈SO₄(OH)₁₆·23H₂O