The renowned Chelsea Filter is a must have for identifying colored stones. While it was originally intended to rapidly differentiate between natural Emeralds and synthetic Emeralds, it was also found to be a valuable tool in identifying other coloured gemstones as well. Designed to transmit only deep red and yellow-green light.
Specifications
Lens Diameter: 20mm
Housing Diameter: 25mm
Warranty: 2 years
Chelsea Filter Gemmologist Tool
Free Shipping within Australia.
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