Gem-A Chelsea ® Colour Filter Developed originally to distinguish emeralds from imitations and doublets, this filter helps narrow down the possibilities when identifying certain green, red and blue stones.
Table Polariscope Our popular polariscope helps you identify gemstones by quickly and accurately identifying single or double refracting stones.
Gem-A Chelsea ® Colour Filter Developed originally to distinguish emeralds from imitations and doublets, this filter helps narrow down the possibilities when identifying certain green, red and blue stones.