Chelsea Filter Knew Concepts Principles of folding

Principles of folding

No special tools or adapters are required beyond a standard mallet

One 90° V-shaped groove for angular bending

Round cable dapped and flat construction with alternating rondel-shaped beads between links

6" x 2" x 1/2" Mounting Wood box Material Natural Arkansas stone Color Varies — natural product Quantity 1 stone

Chelsea Filter Knew Concepts Principles of foldingThe 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