Formula: CuAl₄(SO₄)(OH)₁₂ · 3H₂O 

Species: Sulfates

Colour: Turquoise-green, pale blue, bluish-grey; colourless in transmitted light.

Lustre: Vitreous, Sub-Vitreous, Dull

Hardness: 2½

Specific Gravity: 2.29

Crystal System: Monoclinic

Member of: Chalcoalumite group. Chemically similar to woodwardite.

Name: In allusion to its composition, containing copper (CHALC-) and ALUMinum.

Type Locality:  Holbrook Mine (Holbrook shaft), Copper Queen Mine (Halero Mine), Queen Hill, Bisbee, Cochise County, Arizona, USA