Gillespite

Formula:  BaFeSi₄O₁₀

Origin of name:  For F. Gillespie, American miner

Crystal system:  Tetragonal

Crystal class:  4/m 2/m 2/m

Twinning:

Unit cell:

Colour:  Red

Diaphaneity:  Translucent

Luster:  Vitreous

Habit:  Massive, compact; embedded grains

Hardness:  3

Specific gravity:  3.40

Cleavage:  2; {001} distinct, {100} indistinct

Tenacity:

Streak:  Pink

Synonyms/varieties:

Comments: