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!

Tarnowitzite from Bou Beker, Morocco

Contributed by: Simone Conti
minID: 7PX-JWH
Date: Apr 6th, 2026
Locality: Bou Beker (Bou Bekker; Bou Becker), Touissit-Bou Beker mining district, Jerada Province, Oriental Region, Morocco (See on Mindat)
Size: 4 x 3 x 5 cm
Weight: 73.6 g

Description:
Tarnowitzite, a lead bearing variety of aragonite. Some say that tarnowitzite is a mix of aragonite and cerussite. It fluoresces white under shortwave and pale yellow under longwave UV light.

Featured on Rocks & Minerals: Bruce Cairncross (2024) Connoisseur’s Choice: Aragonite Part 4: Morocco, Rocks & Minerals, 99:2, 142-149, DOI: 10.1080/00357529.2024.2279425

Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Aragonite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Yellow
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White

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