Stanleyite

Formula: VO(SO4).6H2O

Origin of name: for Henry Stanley, Welsh-American journalist

 

Crystal system: orthorhombic

Crystal class: -1

Twinning:

Unit cell: 

 

Colour: deep blue

Diaphaneity: 

Luster: 

Habit: an efflorescence or 1.5 mm fragments

Hardness: 1 to 1.5

Specific gravity: 1.95

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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