Gemological Polariscope – Gemstone Identification Tool

This professional gemological polariscope uses polarized light to help identify and examine the optical properties of gemstones. An essential instrument for gemologists, jewellers, gemstone dealers and gemmology students, it can help determine whether a gemstone is isotropic, anisotropic, anomalously double refractive (ADR), or an anisotropic aggregate.

The instrument features two polarizing filters, one positioned above and one below the gemstone. When their vibration directions are positioned at right angles to each other, the viewing area becomes dark. This is known as the crossed position and provides the controlled viewing environment required for polariscope examination.

Compact and straightforward to operate, this polariscope is a valuable addition to any professional gemstone identification and testing setup.

Key Features

• Professional gemological polariscope
  
• Uses polarized light for gemstone identification
  
• Two polarizing filters: polarizer and analyzer
  
• Allows observation in the crossed position
  
• Helps determine gemstone optical behaviour
  
• Useful for examining single and double refractive behaviour
  
• Suitable for loose gemstone examination
  
• Simple visual testing method
  
• Ideal for professional laboratories and gemmology education
  

When used correctly, the polariscope can help determine whether a gemstone is:

• Isotropic
  
• Anisotropic
  
• Anomalously double refractive (ADR)
  
• Anisotropic aggregate

These observations provide valuable information when narrowing down the identity and optical character of an unknown gemstone.

How It Works

A polariscope contains two polarized filters with their own vibration directions. When the vibration direction of the polarizer is positioned at right angles to that of the analyzer, the field between them appears dark.

The gemstone is placed between these filters and observed while being appropriately positioned or rotated. Changes in the appearance of the stone can provide information about its optical behaviour and assist with identification.

Specifications

• Product Type: Gemological Polariscope
  
• Application: Gemstone identification and optical examination
  
• Optical System: Dual polarizing filters
  
• Filters: Polarizer and analyzer
  
• Testing Position: Crossed position
  
• Filter Material: Polarizing plastic sheet
  
• Filter Composition: Polyvinyl alcohol containing dichroic molecules / stretched polymers
  
• Testing Method: Polarized light examination
  
• Suitable For: Professional and educational gemmology
  

Gemologists • Jewellers • Gemstone Dealers • Gemmology Students • Appraisers • Gemological Laboratories • Jewellery Workshops • Gemstone Buyers

Important Note
A polariscope is a gemological identification aid. Results should be correctly interpreted and, where necessary, combined with other gemological instruments and testing methods when identifying an unknown gemstone.