Features: This gemological tool is helpful for identifying certain red, blue and green gemstones. It is used to determine whether a gemstones is natural or synthetic. Can also be used for detecting Synthetic Blue-Spinel and for detecting dyes in certain gemstones. Most popular and easy-tool for identification. Small size, portable, easy to carry wherever you go.
note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.