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"The Works' Gem Filter Set Features
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Includes Ruby & Aqua Filter Set, Synthetic Emerald Filter Set, Bead Buyer's & Parcel Picker's Filter Set...
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Auxiliary Filter Set - Model 2010 - Yellow Synthetic Sapphire Filter, Cape Line Color Filter for Spectroscopy, Red Filter for Crossed Filter Test, Chromium Fluorescence Filter, Standard Reference Color Filter, Describing Gemstone Color
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Tanzanite Filter & Dichroscope, w/Pleochroism Table, and Stained Lilac and Stained Green Jadeite Filters
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Alexandrite & Color Shift Filter, and Poor Man's Chelsea Filter
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Hodgkinson Method - Model 2004 - Gemstone Characterization w/o Instruments...
About "The Works' Gem Filter Set
Characterization and identification of Gems by the use of color filters has always been an appealing approach because of its affordable simplicity and the ease of examining multiple specimens. This set constitutes the entire body of Dr. Hanneman's life work on Gem Filters - a tremendous value! Actual set contains about 50 "luggage tag" filter cards.
