Painite

Formula: CaZrBAl₉O₁₈

Origin of name: for Arthur Pain, British gem collector

Crystal system: hexagonal

Crystal class: 6

Twinning:

Unit cell: a = 8.755, c = 8.491

Colour: red, orange-red, brownish

Diaphaneity: transparent

Luster: vitreous

Habit: one gem crystal known, weighs 1.8 g

Hardness: about 8

Specific gravity: 4.03

Cleavage: none

Tenacity: 

Streak: White

Synonyms/varieties:

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