Rockyard Agate-opal (Blue Phos) - UVabc

From the local rockyard comes this 5" wide specimen of agate-opal (possibly cacholong) with a coating of caliche. This type of mineral is very interesting because of it's long lived blue phosphorescence after exposure to UVa.

 

Contains:

Agate-opal (FL Blue, Yellow/Green >UVa,bc) possible activator: (UO2)2+

Caliche (FL+PHOS Bluish green >UVabc) possible activator: (UO2)2+

 

Shown under 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"

 

Obtained from Highland Rocks and Gems' Rockyard, Burns OR, USA.

 

Series best viewed in Light Box mode using Right and Left arrows to navigate.

Photostream best viewed in Lightbox mode (in the dark).

 

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

Done