Corvusite

Formula:  V₁₄O₃₄ ^. nH₂O

Origin of name:  From Latin for raven

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell:

Colour:  Brown, bluish black, greenish black

Diaphaneity:  Opaque

Luster:

Habit:  Massive; microscopic flakes

Hardness:  2.5 to 3

Specific gravity:  2.82

Cleavage:  None

Tenacity:

Streak:  Same as colour

Synonyms/varieties:

Comments:  Series with fernandinite