Mexican Feldspar, Calcite, Chalcopyrite - UVc

From Durango, Mexico comes this 5" wide specimen of feldspar with small crystals of brassy chalcopyrite.

 

Contains:

Feldspar (FL Red >UVc)

?? (FL Orange-yellow >UVc)

 

Shown under UVc light.

 

Key:

WL = White light (halogen + LED)

FL = Fluoresces

PHOS = Phosporescent

UVa = 368nm (LW), UVb = 311nm (MW), UVc = 254nm (SW)

'>' = "stimulated by:", '!' = "bright", '~' = "dim"

 

Obtained from Earth's Treaures at Obsidian Days 2014 in Hines, Oregon.

 

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18 Watt Triple Output UV lamp from Polman Minerals - Way Too Cool UV lamps

Done