Celestine from La Grasta Mine, Sicily, Italy

Contributed by: Simone Conti
minID: 4U1-XW8
Date: Dec 3rd, 2024
Locality: La Grasta Mine (Grasta Mine), Caltanissetta, Caltanissetta Province, Sicily, Italy (See on Mindat)
Size: 5 x 7 x 7 cm
Weight: 355 g

Description:
Clear white celestine crystals (about 1cm) with sulphur on matrix. The celestine fluoresces a nice blue/white under UV light (any wavelength) and it has a greenish phosphorescence/afterglow.

Normal light.

Fluorescence under shortwave UV light.

Fluorescence under longwave UV light.

Afterglow after exposure to shortwave UV light.

Summary of luminescence responses:

Celestine (Mindat) (RRUFF)

• Fluorescence under Longwave (365nm LED) UV light: White
• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White
• Afterglow after exposure to Longwave (365nm LED) UV light: Green