The Chelsea Filter (shown here in "open" position, folds into casing for convenient compact size)

This half-dollar sized color filter is the easiest and fastest to use of all gem identification instruments. Indispensable when looking at any colored gemstone It especially useful for differentiating emerald from emerald look-alikes, sapphire from sapphire look-alikes, aquamarine from aquamarine look-alikes, and dyed green jadeite from fine natural green jadeite. Essential to use to check for substitutions in parcels of gemstones, strands of beads, and jewelry containing numerous stones of the same color.

Chelsea Filter ($44.95)

Does in a single filter what it might take several filters to do. Practical 22-mm lens size. Plastic swing-out casing protects lens and increases convenience and portability.

Save 12% when purchased as part of the Pocket Instrument Trio. I want to

 

The Synthetic Emerald Filter Set (Hanneman) A new pocket-size, two-filter set that can quickly separate most natural emerald from synthetic when used in conjunction with the Chelsea filter. This two-filter set is essential for anyone buying and selling emeralds, and includes:

Synthetic Emerald Filter Set (Hanneman) $32.00

A filter that separates flux-grown synthetic emeralds from natural chromium-rich emeralds. A filter that distinguishes hydrothermal synthetic emeralds from natural  non-chromium-rich emeralds (such as those found in India and Zambia). I want to

 

Bead Buyer's and Parcel Pickers Filter Set  (Hanneman) $24.00

A four-filter set, each a different color, used for examining large lots of colored stones or pieces with settings containing many stones. I want to

 

Tanzanite Filter (Hanneman) $28.00

Today, tanzanite is one of the most popular of all gemstones. And imitation being the highest form of flattery, many imitations are now flooding the marketplace, often misrepresented as the real thing! Now tanzanite buyers don't have to worry. This simple filter, used in combination with the Chelsea filter, will instantly and accurately separate the numerous imitations from genuine tanzanite. A MUST for tanzanite buyers. I want to