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Smoky topaz, subtle, sensual smoky
quartz has been a beloved gemstone in jewelry for centuries. Combine these good
clarity, finely cut beads with rock crystal, mauve or peach pearls or citrine.
Smoke Quartz range from tan, brown to light gray. These colors are
somewhat rare in the mineral world, Only a few other brown or black minerals are
ever cut for gemstones such as the smoky topaz, the very rare black beryl or the
brown corundum. Smoky quartz sometimes forms with an etched pattern of lines,
depressions and raised termination's. If these etched termination's are
accompanied by plainly visible internal
cavities arranged in geometric patterns related to the quartz crystal structure,
the form is referred to as skeletal or 'elestial' quartz. The internal cavities
of skeletal quartz often
contain clay minerals of varied colors, sometimes accompanied by carbon dioxide
or water. These cavities can have a layered or ribbed aspect and are sometimes
so pronounced as to make the crystal almost hollow, giving rise to the term
skeletal quartz.
Smoke Quartz
contains rutilations, it is sometimes called Smoky Sagenite
rather than Rutilated Quartz. Smoke Quartz has been misleadingly sold as Smoky
Topaz. Smoke Quartz
is now often cooked at high temperatures to produce the more profitable orange
yellow
Citrine. This process usually creates darker brownish orange stones. Which
can be confused with the deeper color natural Citrine from Brazil.
- USES: Gemstone and ornamental stone.
- COLOR: various shades of black and brown.
- INDEX OF REFRACTION: 1.544-1.553
- BIREFRINGENCE: 0.009
- HARDNESS: 7
- CLEAVAGE: none
- CRYSTAL SYSTEM: trigonal
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