Diopside

 

The transparent, greenish varieties are used as gems an - have no separate name; however, the brilliant green var ety, which also contains chrome (as can be seen, for ex ample, from the absorption spectrum), is known as chrom• diopside.


Appearance Gem diopside is generally a dark, bottl green, but may also be light, rather dull, yellowish greer However, when the color is due to chrome, it can be a live lier, almost emerald hue. It has unexceptional, vitreous lus ter, and is given both mixed, oval, and cabochon cuts. It inot very common, and gems weighing many carats ar• rare.


Distinctive features The bottle green color with quit, strong birefringence is fairly characteristic, but as it car closely resemble certain tourmalines and olivines of a sim, lar color, the physical properties normally have to be mea sured to confirm identification.


Occurrence Gem diopside comes mainly from Brazil, S, Lanka, Burma, and Madagascar. New York, Italy, Austrir and Switzerland also produce fine quality gemstone, Chrome diopside is found in South Africa and Finland. Value It is not a very well known gem, outside the areawhere it is mined and cut, and is not highly prized. The brilliant green (chrome diopside) varieties are of low value even compared with other secondary gems. The dark light green varieties are worth still less.


Simulants and synthetics It is neither imitated nor p, duced synthetically.

 

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