Rockyard Calcite (Blue Phos?), side B - WL

From the local rockyard comes this 3.5" wide specimen of calcite with a coating of caliche. This form of weathered calcite sometimes also contains a mysterious surface layer with a bright blue phosphorescence but with no apparent fluorescence. Tests show the blue phosphorescence is most strongly stimulated by UVa light.

 

Contains:

Calcite (FL Blue, Pink >UVa,bc)

Caliche (FL+PHOS Bluish green >UVabc)

?? (PHOS Blue >UVa,bc)

 

Shown in phosphorescent state after exposure to UVabc light.

 

Key:

WL = White light (halogen + LED)

FL = Fluoresces

PHOS = Phosphorescent

Blue = 450nm,

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

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

 

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

Done