Sunday, 23 April 2017

Chrome Tourmaline

Chrome tourmaline is a special member of the tourmaline group. Found only in east Africa, it is usually found in small sizes. What it lacks in size it makes up for in color - it displays perhaps the richest, most intense green in the gemstone world.
There are similarities between chrome tourmaline and tsavorite garnet. They are found in the same locations in Tanzania, and both are colored by chromium and vanadium. Chrome tourmaline, in many ways, is equal to the finest tsavorite.

Chrome tourmaline is a distinct variety of tourmaline, called chrome dravite.
Like emerald and tsavorite garnet, fine chrome tourmaline is a pure forest green with slightly yellowish to bluish secondary hues. With a hardness of 7 to 7.5 on the Mohs scale and no cleavage, tourmalines of all types have good durability.

Generally, tourmalines are Type II clarity stones, showing inclusions. However, one can find eye clean green chrome tourmalines. Most would only buy chrome tourmaline graded IF (internally flawless) to VS (very small inclusions).