Calciohilairite

Formula:  CaZrSi₃O₉ ^. 3H₂O

Origin of name:  From calcium and hilairite

Crystal system:  Hexagonal

Crystal class:  32

Twinning:

Unit cell:

Colour:  White to pale blue

Diaphaneity:

Luster:  Vitreous

Habit:  Trigonal prismatic crystals to 2 mm

Hardness:  4

Specific gravity:  2.68

Cleavage:  None

Tenacity:

Streak:

Synonyms/varieties:

Comments:  Ca analogue of hilairite