Big Prism Spectroscope

Length: 130mm Diameter: 20 mm Material: Aluminum (Heavy Duty) Inside Instruction: Prism Type Durable

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Focusing Prism Gem Spectroscope With Adjustable Focus Gemology School Spectrometer Gemological Testing Tools

15mm in Diameter Pocket Gemological Spectroscope Durable and Reliable Gem Stone Tool

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Length: 130mm Diameter: 20 mm Material: Aluminum (Heavy Duty) Inside Instruction: Prism Type Durable

Big Prism Spectroscope

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Focusing Prism Gem Spectroscope With Adjustable Focus Gemology School Spectrometer Gemological Testing Tools

Handheld Precise Small Diffraction Spectroscope Gemstone Gem GemelogyGemological 55mm Length

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CLMG-7204 Big Prism Spectroscope Gemstone Gemology Testing Gemological Jeweler Jewel Tester Tool Handy 130mm in Length