Polariscope, mains-powered. Toolsets mostly for jewellery We sold several thousand pen-probes

We sold several thousand pen-probes for the predecessor of these models (the KEE tester

some marquis and ovals)

one year guarantee

AND advanced users can glean further information by rotating the stone to see if either or both of the shadow edges move

Polariscope, mains-powered. Toolsets mostly for jewellery We sold several thousand pen-probesSummary Approx. 7 X 6 X 5 inches, and the filter ("platform") 35mm diameter. Large base, easily rotates. Stone holder attaches to base for easy positioning of stone. Built in light. Guarantee: 1 year. Detail This instrument will show you if a gemstone is singly or doubly refractive. For instance, Moissanite is strongly doubly refractive, diamond is singly refractive. This is, therefore, a very cheap (if a little fiddly) method of distinguishing