Ade Advanced Optics Chelsea Filter – Professional Gemstone Tester for Gem Identification, Jewelry & Diamond Testing – Jewelers Loupe Tool for Sapphire, Aquamarine & Stones

Great filter. Has already saved me money with people selling fake emeralds and ruby's.

This is the first Chelsea filter I've owned so I don't have anything to really compare it to. Overall, I really like this and have been using it to test some gems in my collection. The only thing that is frustrating for me personally is that if you try to look through it in the same way you would a loupe it is very blurry. I have to hold it at a distance (about 4 to 6 inches away from my eye) to see the gem clearly, but then I wonder if I am seeing the color of the gem through the lens properly since it is relatively far away. But like I said, this is the first one I've owned so I'm not sure if they are all blurry up close. Still happy I got it and am having fun using it!

A very high quality product. Made of steel. Arrived quickly and intact. A must have product.

If you know how to use it. I is a great tool to have in your tool box. Caution! If you do not know how to use it, do not buy it. It will get you into more trouble than it is worth.

I love this little filter. I love knowing that I will never buy fake blue lapis again! If you go online you can find a chart that will help you to identify if the gem is real or not. YOU ALSO HAVE TO HAVE A REALLY GOOD LIGHT SOURCE IN ORDER TO SEE THE COLOR DIFFERENCES. Once you get that light source it's obvious if the gem is real or not. Very good product.