Fluorescent Mineral Database

A new secret project! Trying to create a nice Fluorescent Mineral Database (FMDB), which would be searchable by mineral, locality, and luminescence properties. Also making it easy for people to contribute with their own specimens!

Selenite - Salinas de Otuma, Pisco, Peru

Contributed by: FMS Admin
Date: Feb 22nd, 2026
Locality: Salinas de Otuma (Las Salinas; Salinas de Paracas), Otuma village, Paracas District, Pisco Province, Ica, Peru (See on Mindat)
Size: 54 x 36 x 64 mm

Description:
Rosettes and larger twinned crystals of translucent golden selenite, fluorescing pale yellow in LW. The crystals are also phosphorescent for several seconds in the same color (not pictured). A macro closeup is included with FOV 30mm.

Originally posted by Dennis Michael on Nature's Rainbows.

Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Normal light.
Normal light.
Fluorescence under longwave UV light. Closeup FOV 30mm
Fluorescence under longwave UV light. Closeup FOV 30mm
Normal light. Closeup FOV 30mm
Normal light. Closeup FOV 30mm

Summary of luminescence responses:

Gypsum var. Selenite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: White
  • Afterglow after exposure to Longwave (365nm LED) UV light: White

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