Many thanks to all of the individuals who so kindly replied to my
question about tanzanite. The stone in question is a beautiful
natural blue uncut crystal, which will be able to remain untreated
after cutting. From the I received, the consensus
indicates that less than 2% of this material comes out of the ground
naturally blue in color. This crystal is strongly pleochroic, when
viewed through one direction it is a lovely blue, turned 90 degrees
it is strongly violet.
It should yield a beautiful finished gem, which will be a perfect
stone for this particular client. It was a fortunate situation where
the client was able to see and handle the rough crystal before the
cutting begins, and in addition both the source and the stonecutter
can attest to the fact that the color is not enhanced.
I really appreciate the help from the many Orchid members who
contributed, both on and offline, thanks again!
Michael David Sturlin, jewelry artist @Michael_David_Sturli
Michael Sturlin Studio, Scottsdale Arizona USA