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Specifications
Gemological Mini polariscope- 30mm diameter
- LED cold light source
- Built-in 3V button cell
- Leather packing
Gemological Mini Polariscope
Jewellery Crystal polariscopes,Handheld Polariscope
Black aluminium alloy appearance.
Diameter of polaroid:30mm.
With white led cold sources.
Build-in 3V button battery
Polariscope
Polariscope is used to determine if a gemstone is natural or not. It can differentiate diamonds from Moissanite. It also detects strains in diamonds. It can differentiate between gems that have double or single refraction i.e. birefringence. Double refraction is the breaking up of a ray of light into two rays, the ordinary ray and the extraordinary ray, when it passes through some materials like calcite also called Iceland spar. This effect can take place in gems that are anisotropic in structure i.e. having properties that differ according to the direction of measurement. The polariscope helps to track and see the path the rays of light are taking through the stone that is being tested. By measuring the optic characteristics of transparent to translucent gem material, the refractive index is found. Double refractive is only a property of solids. For transparent materials, the graph of index, unlike the wave length, is curved with a few general characteristics. A gem is held between two polarized plates and the light transmitted through it is studied and based on the readings the identification is made.
Some gemstones with double refraction are Quartz, Tourmaline, Ruby, Peridot,Sapphire, Zircon and Rulite to name a few. Diamonds are isotropic, meaning single refraction. Topaz, Mica and Perovskite have triple refraction.
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