Gem filters

Chelsea filter (for artificial colour)

Hanneman Filter for Tanzanite.

Jade filter - Hanneman

Ruby Filter
Colour filter for pink and red stones: it makes colour changes visible

The Hanneman Gem Filter Set – Model 4000 is a set of gemological optical filters designed by Dr. William (Bill) Hanneman, Ph.D., an internationally renowned chemist and gemologist, for the practical and rapid identification of gemstones.
This Hanneman Gem Filter set contains five filters.

Spectro Aid Judy Scope WITHOUT TORCH

SET-A containing 5 appropriately sized faceted specimens, carefully selected to display high-quality spectra.