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Tanzanite is the gemstone name
for the mineral Zoisite.
Please see mineralogical information
for Tanzanite
here at Mindat.org.
We selected and purchased this gem for its
loupe-clean clarity and the saturated
deep violet-blue color. Naturally trichroic, Tanzanite shows a range of violet to
violetish-blue to blue tones. 'Block D' is the specific mine from
which best stones like this one originate.
It is common for large Tanzanites to
show deep color, whereas smaller stones are often lighter.
Stones like this one, not overly large, but showing top color,
are always in demand and never in great supply.
Most dealers do not want to re-cut Tanzanite.
The stone is just too expensive, even at the mine site in Tanzania, and
is cut primarily to result in the heaviest stone possible. These
'native'-cut stones, however, are often off-center and mis-proportioned,
as well as lacking high polish which is required for maximum brilliance.
Further, the girdles are not even or polished, adding to the difficulty
and risk in setting.
When we purchased it, this stone was cut and
polished poorly. We had an experienced and
skilled cutter completely re-cut and re-polish the gem, top and bottom. Now we
are proud to offer a high quality, investment-grade gem which looks
fantastic and will stand out as superior to lighter-toned stones,
included stones, and stones which have not been professionally re-cut. |
