Zirconolite

Formula: CaZrTi2O7

Origin of name: Named for the composition

 

Crystal system: Amorphous

Crystal class: 

Twinning: 

Unit cell: 

 

Colour: Black to brown, red

Diaphaneity: Translucent to opaque

Luster: Resinous

Habit: Striated, massive, prismatic

Hardness: 6.5

Specific gravity: 4.8

Cleavage: 

Tenacity: Conchoidal fracture

Streak: Dark brown, brownish yellow

 

Synonyms/varieties: Polymignite-metamict

 

Comments:  Found in pegmatites

 

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