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Characterization and identification of gems by the use of color filters has always been an appealing approach because of its affordable simplicity and the ease of examining multiple specimens. Using these filters is simple. Just place the stone on the included viewing surface, illuminate it with incandescent light, and hold the filter close to the eye. Observe the apparent color of the stone and match that up with the identifying chart that comes with the filter.
This set includes the following individual filters:
|Zircon and Benitoite||
Brilliant flashes of Red and Blue-Green
|Red Glass||Dark Purple|
|Pink Spinel||Light Blue|
|Pink Sapphire||Light Blue|
Full instructions are included. This item typically ships within 1 business day.
I love having all of these light filtering cards available at my fingertips. They are compact, yet a good size for doing what they were designed for!
As well, Mineral Labs provided me with absolutely outstanding customer service! I actually got my order shipped the same day it was placed; and within 20 minutes, at that! Lol, they may have set the bar too high - but I doubt it! Unknown on Jun 22nd 2016