Lord Balarama scattered the fat of Vala's body over the areas of China, Nepal, and the lands of the Yavanas and Mongols. Everywhere they fell, these transformed particles of fat originated deposits of jade.
These gems are primarily conch shell white or lotus stem green, but also are found in pink, lavender, and black colors.
Jade is extremely hard and resists scratching. It is difficult to cut, so a jade peace, beautifully cut and polished is worth far more than a similar gem in its natural rough shape.
Among all gems, fine quality jade has the greatest ability to remove negative karmic reactions. --- Sri Garuda Puranam: Chap. 79