Grossular

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

  

     

Pink dodecahedral grossular crystals up to 0.4 cm are set on diopside matrix. The crystals are fluorescent under SW UV light.

Origin: Jeffrey Quarry, Asbestos, Quebec, Canada

Ex. Keith Hayes coll.

Sample size: 2,7 x 1.4 x 1.4 cm

 

  

  

Gemmy, intense green grossular from the famous tanzanite mines at Arusha. Miners pop these off with screwdrivers from the graphite matrix. This one has a bit of the graphite remaining.

Origin: Merelani, Arusha, Tanzania

Ex. Keith Hayes coll.

Sample size: 0.6 x 0.7 x 0.5 cm

 

  

  

Two dodecahedral, orange-brown grossular crystals, 2.3 and 1.8 cm across, perched on a wollastonite-rich matrix. The back of the garnets is contacted, revealing internal colour zonation due to a Ti-rich core zone.

Origin: Lake Jaco, Sierra de la Cruz, Coahuila, Mexico

Ex.  Jesse Fisher coll.

Sample size: 7 x 4 x 3 cm

 

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