Good Price Very Good Portable Pocket Dichroscope for Gemstone Testing, 21 mm Diameter Essential Gemological Instrument for Every Gemstone Enthusiast Buy Now!

Specifications

Diameter: 21 mm
Matrial: Aluminum & Optical Glass
Case: Practical purposeful robust leather case
Other: Foldable & Lightweight

What it is: An optical instrument containing a small calcite crystal. When light from a gemstone passes through the crystal, the light is split into two polarized beams.

Application: The instrument is used to detect pleochroism (or dichroism), which means that a stone shows different colors depending on the angle you look at it from. This depends on the crystal structure of the mineral.

Effect: When you look into the dichroscope, you will see two small windows side by side. If the stone is birefringent, the two windows show different colors or shades of color. If the stone is monorefractive (like diamond, garnet or glass) you will see the same color in both windows. It is an excellent tool for distinguishing, for example, a genuine ruby ​​(dichroic) from a red glass imitation or garnet (non-dichroic).