Can someone explain this to me?
Any place I can buy reasonable dumortierite in strands?
Thanks.
- posted 14 years ago
Difference between dumortierite and denim lapis
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- posted 14 years ago
Dumortierite is an entirely different stone than lapis. I had a strand of
4mm beads once and they were a uniform dark blue (a little greyer than grade
A or B lapis). Also, didn't seem to take a polish quite as well as lapis.
Firemountain Gems has strands in several shapes.
Georgia
Georgia
- posted 14 years ago
This may be helpful:
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The hardness is 7 on Mohs scale
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Lapis Lazuli has a hardness rating of 5.5 (so, softer than dumortierite)
Barbara
Beader and Polymer Clay Junky
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- posted 14 years ago
Barbara's above links have excellent information.
In general, Lapis is royal blue with pyrite (Fool's gold) inclusions,
and lesser quality Lapis, often called Denim Lapis, has a duller color
and lots of calcite (white) inclusions. Dumorterite has a gray or
black matrix to it, and the color can be a dark denim jean color, or
some varieties are almost a medium bleached denim color. Dumorterite is
much cheaper than Lapis or denim lapis. A lot of dumorterite now comes
from Canada, where it is sometimes called "Princess Margaret stone"
because a large deposit of it was discovered when she was making a
state visit there in the 1960's.
Patti
Patti
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