Ruizite

Formula: CaMn₂Si₄O₁₁(OH)₄.2H₂O

Origin of name: for Joe Ruiz, American amateur mineralogist

Crystal system: monoclinic

Crystal class: 2/m

Twinning: common on {100}

Unit cell: a = 11.95 Å, b = 6.17 ¡, c = 9.03 Å, b = 91.4°

Colour: orange to brown

Diaphaneity: 

Luster: 

Habit: crystals prismatic, single crystals rare, as spherules

Hardness: 5

Specific gravity: 2.9

Cleavage: none

Tenacity: 

Streak: pale apricot

Synonyms/varieties:

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