I am currently the Digital Coach for the City of London and the West, within the London and Midlands Region. My role in a nutshell is to coach our leaders on sustainable banking whilst making the lives our of customers easier.
(There is also genuine color-change sapphire which mimics alexandrite, as well as color-change garnet that can be a real fooler.). The first thing to do is check the refractive index of the stone, since each material has unique optical properties.
(While there, place an order for a 3Ct diamond ring, that would make his day :). The test is a straight forward one. Like natural sapphire, a synthetic sapphire watch crystal will 'excite' the LED meter to the very last red bar, just under the diamond level. Mineral glass will result in no lit LED lights. And it is as simple as that! Contrary to commonly held opinion, that even a hard synthetic sapphire crystal like the one fitted on a Rolex watch CAN be scratched. If you are still tempted to go for a sharp nail test, do it in the privacy of your home.