Gem Polariscope
Different gemstones display unique optical reactions when observed under a gem polariscope, making it a valuable tool for gemstone identification. This instrument is designed to analyze a gemstone’s pleochroism, optic character, and polarization properties with ease. A standard gem polariscope consists of an upper and lower polarizing filter, a light source, a glass stage, and an interference sphere lens (except for the FPP-30 model). The lower polarizer remains fixed, while the upper one rotates to adjust polarization angles. A rotating glass stage positioned above the lower polarizer allows precise observation. The interference sphere lens is used to examine gemstone interference patterns, aiding in advanced optical analysis.
The gem polariscope is widely used to differentiate between isotropic and anisotropic gemstones and to identify microcrystalline or cryptocrystalline aggregates. It also helps determine whether a birefringent gemstone has uniaxial or biaxial optical properties. For optimal results, the polariscope should be used in combination with other gemological tools such as a refractometer, UV fluorescence lamp, and microscope. Together, these gem testing instruments provide a comprehensive approach to gemstone identification.
After determining that the gemstone is anisotropic, the interference sphere can be used to further analyze its optical axis properties.
| Material | Metal |
| Polariscope | Tabletop type |
| Voltage | 100V-240V |
| Size | 110×70×145mm |
| Weight | 570g |
| Accessory | 10mm conoscopic lens ×1 |
| Packaging | Standard rigid cardboard box packaging |
- 49mm large-aperture polarizer with a detachable design
- High-quality polarizer with a fully rotatable upper polarizer (360-degree adjustment) for flexible observation. The lower polarizer remains fixed for stable measurements.
- High-brightness, long-lasting white LED cool light source, providing stable illumination while protecting the polarizer.
- Specimen stage: 360-degree smooth rotation for flexible positioning.
- Conoscopic lens: High-intensity focusing lens for enhanced optical clarity.
| Material | Metal |
| Polariscope | Tabletop type |
| Voltage | 100V-240V |
| Size | 110×70×145mm |
| Weight | 650g |
| Accessory | 18mm conoscopic lens ×1 |
| Packaging | Standard rigid cardboard box packaging |
- 49mm large-aperture polarizer with a detachable design
- High-quality polarizer with a fully rotatable upper polarizer (360-degree adjustment) for flexible observation. The lower polarizer remains fixed for stable measurements.
- High-brightness, long-lasting warm white LED light source, designed to simulate incandescent lighting. It enhances interference pattern observation while ensuring stable brightness and protecting the polarizer.
- Specimen stage: 360-degree smooth rotation for flexible positioning.
- Conoscopic lens: High-intensity focusing lens for enhanced optical clarity.
| Material | Metal |
| Polariscope | Tabletop type |
| Voltage | 100V-240V |
| Size | 135×82×150mm |
| Weight | 710g |
| Accessories | 18mm conoscopic lens ×1 |
| Packaging | Standard rigid cardboard box packaging |
- 49mm large-aperture polarizer with a detachable design
- High-quality polarizer with a fully rotatable upper polarizer (360-degree adjustment) for flexible observation. The lower polarizer remains fixed for stable measurements.
- Supports dual light source switching. Warm light (3200K-3800K) enhances visibility when observing gemstones with low transmission. White light (6000K-6500K) aids in detecting pleochroism. Both light sources ensure stable brightness.
- Specimen stage: 360-degree smooth rotation for flexible positioning.
- Conoscopic lens: High-intensity focusing lens for enhanced optical clarity.
| Material | Full black aluminum alloy casing |
| Polariscope | Handheld type |
| Size | 35×85mm |
| Weight | 130g |
| Accessory | 12mm optic glass conoscope for option(non-standard accessory) |
| Packaging | Leather case packaging |
- Powered by a 3V button cell battery, enabling portable use
- 25mm diameter polarizer
- High-quality polarizer with a fully rotatable upper polarizer (360-degree adjustment) for flexible observation. The lower polarizer remains fixed for stable measurements.
- Long-lasting white LED cool light source
- Removable specimen stage for easy adjustment and versatility
- No conoscopic lens included (optional glass conoscopic lens available).
