A Emmerman (posted by M Cole)

Nov 1, 2016

Apatite Crystal from Mt St Hilaire, Canada - Red fluorescence under Longwave, Unusual.

Here's pretty specimen - a small apatite crystal of about 2 mm across, on a matrix of albite. Came from Mount Saint Hilaire.
 

 
The apatite shows different responses to different UV-bands but the feldspar only fluoresces dim red under SW.
 

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