Datolite

  

  

A relatively large, sharp, highly lustrous, gemmy green blocky crystal of datolite with a few associated hexagonal calcite crystals aesthetically perched atop the specimen.

Origin: Dal'negorsk, Primorskiy Kary, Russia

Sample size: 5.2 x 5.0 x 3.7 cm

 

  

Origin: Clark Mine Adit, Keweenaw Peninsula, Michigan, U.S.A.

Sample size: 4.7 x 4.2 x 1.7 cm

 

  

Polished datolite slab

Origin: Mesnard Mine, Hancock, Houghton Co., Michigan, U.S.A.

Ex. Seaman Museum collection

Sample size: 7.0 x 4.8 x 0.6 cm

 

  

  

This specimen consists of dozens of gemmy, light green colour datolite crystals forming a flat "casts" where a blade of anhydrite once existed, but has since dissolved away. The specimen also features a gemmy, blocky, colourless crystal of apophyllite sitting on basalt matrix

Origin: Upper New Street Quarry, Paterson, Passaic Count, New Jersey, U.S.A.

Sample size: 9.0 x 7.3 x 5.7 cm

 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone