Uses white light sources such as and incandescent lamps. Clear lens, Foldable design. Discover gemstone pleochroism with ease! This foldaway dichroscope is perfect for observing color variations in birefringent gemstones. Simply illuminate your sample with white light, maintain a 2-5 cm viewing distance, and rotate for a full 360° observation. Unveil the beauty of true dichroism in no time! Compact and portable. 2-5cm distance between the dichroscope and the gemstone during the inspection, moving 360° can observe the trichroism from multiple directions., Weight: 0.08157103694 pounds, Manufacturer: Ehwisbe