Combeite

Formula:  Na2Ca2Si3O9

 

Origin of name:   For Arthur D. Combe, Geological Survey of Uganda

 

Crystal system:  Hexagonal

Crystal class:  32

Twinning:

Unit cell:

 

Colour:  Colourless

Diaphaneity:

Luster:

Habit:  Stout hexagonal prisms, poorly developed, tiny

Hardness:

Specific gravity:  2.844

Cleavage:  None

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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