Formula: NaAl3Al6(BO3)3(Si6O18)(O,OH)4
Origin of name: after locality Olenėk River basin, Russia
Crystal system: hexagonal
Crystal class: 3m
Twinning:
Unit cell:
Colour: pale pink
Diaphaneity:
Luster: vitreous
Habit: outer zone of crystals to 3 mm long acicular crystals with elbaite cores
Hardness: 7
Specific gravity: 3.01
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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