Chelsea Filter Knew Concepts One 90° V-shaped groove for

One 90° V-shaped groove for angular bending

0 mm (soft metals) Stand Dimensions 9" L x 4-1/2" W Origin Made in the USA What's Included

Technique Swiss Draw Sleeve T

Built for sustained bench use

No special tools or adapters are required beyond a standard mallet

Chelsea Filter Knew Concepts One 90° V-shaped groove forThe Chelsea filter is a compact gemological tool used to help identify certain red, blue, and green gemstones by observing characteristic color reactions under filtered light. It is especially useful for spotting imitations mixed into colored stone parcels and jewelry, and for differentiating emerald from common emerald look alikes. Features Assists in identifying select red, blue, and green gemstones Commonly used to detect simulants in colored stone