Good Price Very Good Portable Calcite Dichroscope for Gemstone Testing, Tube 60 mm Long, 15 mm Diameter Essential Gemological Instrument for Every Gemstone Enthusiast Buy Now!

Specifications

Dimensions: 60 mm Long, 15 mm Diameter
Matrial: Aluminum, Optical Glass & Calcite Crystal
Case: Practical purposeful robust leather case
Other: Tube, Lightweight

Calcite Dichroscope

• Technology: Uses a transparent calcite prism that splits the light from the gemstone into two polarized beams with different vibration directions.
• Display: You see both color beams simultaneously in each small window. This makes it easy to directly compare the color shades side by side.
• Advantages: Industry standard and the most preferred instrument among gemologists. It is very effective in detecting even very weak color shifts (weak pleochroism).
• Disadvantages: Can be somewhat more expensive to manufacture and the calcite crystal can be sensitive to scratches.

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).