Vivid against dull color of Jadeite. The range is from opaque to transparent, with the latter being the rarest and therefore most sought after. Transparency of Jadeite Jade. Jadeite, like other minerals, usually contains inclusions in the form of veins and spots. In general, white inclusions are less distracting than black ones and, of course, the less visible the inclusion the better.
Black inclusions affect the value of jade.
Plain polished shapes require higher grade material without flaws. Ratings are made on their proportion and symmetry. For example, a well-cut cabochon should be neither too thick nor too thin in relation to the area of its top surface. Carved designs are often used to eliminate or minimize the effect of flaws and cracks. They are assessed on their aesthetics and the workmanship of the details.