Cyanotrichite

  

  

Cyanotrichite with dark green brochantite, lighter green malachite and pale blue chalcoalumite on matrix

  

Cyanotrichite with green brochantite

  

 

  

  

This specimen consists of dozens upon dozens of excellent, bright blue colour, acicular (needle-like) radiating aggregates or "sprays" of cyanotrichite associated with a few small deep blue crystals of azurite and pale chalky-blue colour chalcoalumite on matrix.

Origin: Grandview mine, Grand Canyon, Coconino County, Arizona, U.S.A.

Sample size: 8.5 x 5.3 x 5.2 cm (top/2nd row), 6.1 x 3.5 x 2.8 cm (3rd/4th row), 4.2 x 2.5 x 2.1 cm (5th/6th row), 8.1 x 8.1 x 3.7 cm (7th/8th/bottom row)

 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone