FAST IDENTIFICATION: Quickly distinguish emeralds, rubies, sapphires, and aquamarine from imitations. GLASS: Equipped with a glass filter for better clarity and reduced distortion. PORTABLE and DURABLE: Heavy-duty design ensures reliability and easy transport for on-the-go gemologists. SIMPLE OPERATION: User-friendly design allows for easy use by holding the filter close to the eye and examining stones under strong electric light. SHOWCASE COMPATIBLE: Examine stones in showcases without needing to hold the filter close to the stone. Portable and Robust: Designed for durability and easy transportation, perfect for mobile gemologists. User-Friendly: Simple to operate; just hold it close to your eye and examine stones under strong electric light. Multipurpose Tool: Effective for identifying a variety of colored stones, including synthetic ones. Specifications:Filter Type: glass filter Light Transmission: Deep red and yellow-green light Usage: Gemstone identification (emeralds, rubies, sapphires, aquamarine, etc.) Operation: Hold close to the eye, examine under strong electric light Compatibility: Can examine stones in showcases with adequate lighting Portability: Yes, designed for easy transport Durability: Heavy-duty construction for long-lasting use Dimensions: Compact size for easy storage and use Recommended For: Gemologists, jewelers, gemstone enthusiasts Colour:White Material:Metal and Glass Package Contents: 1 x Gemstone Identification Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.