Brightly Fluorescent Ruby Crystals, Mysore, India

Contributed by: Chris Clemens
minID: VYP-U9Q
Date: Apr 19th, 2026
Locality: Mysore District, Karnataka, India (See on Mindat)
Size: 55 x 31 x 83 mm
Weight: 130 g

Description:
Raspberry red colored, hexagonal crystals of corundum (var. ruby) in a granite-like matrix, from an unidentified mine in Mysore, India. Under longwave UV the ruby crystals fluoresce an intense red color and the matrix shows a pale blue/white response.

Originally posted by Chris Clemens on Nature's Rainbows in 2020.

Fluorescence under longwave UV light.

Normal light.

Fluorescence under longwave UV light. Side 2.

Normal light. Side 2.

Summary of luminescence responses:

Corundum var. Ruby (Mindat) (RRUFF)

• Fluorescence under Longwave (365nm LED) UV light: Red