Ade Advanced Optics GL500 Gemological Gemstone Gem Refractometer Built-in Light, Aluminum Body with Optic Lens

Product Description

Quality all metal construction

Measurement range of 1.30 - 1.81

Built-in LED light source with 3 x 1.5v batteries - included

Considered by many to be the most important of all gem testing instruments

Polarizing Filter, Hard and soft cases are included

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