Polariscope. Helps you identify gemstones by quickly and accurately identifying single or double refracting stones. Helps distinguish between natural and synthetic amethyst and separate jade and chalcedony from glass. Also helps detect internal strain in many gemstones. The polariscopes built-in light can also serve as a light source for a refractometer. It comes with a stone holder. Measures 5 1/2" x 3 1/4" x 7 1/4". Comes with a 1 year warranty.

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  • Model: GMK415