In the marketplace these gemstones are often virtually inclusion-free. In the marketplace these gemstones are usually included. In the marketplace these gemstones are almost always included. A VVS grade rubellite tourmaline would be characterized by noticeable inclusions, easily seen under 10X magnification but barely visible to the unaided eye. Depending upon the type of gemstone, other classes show a similar variation in definition of clarity grade.
Considerable training is required to accurately grade the color and clarity of gemstones.
We provide the above information only as a general outline of the procedure involved in clarity grading.