What if, someone has a process that makes synthetic stones that
cannot be identified from natural. Do you think he would tell you.
Fortunately, in the one specific case I know of, yes, they do tell!
With the Ramaura Cultured Ruby from J.O. Crystal Co., the creator of
it (Judith Osmer), was ethical enough to hold it off the market (at
the request of GIA) until a dopant could be added to the raw materials
to create a fluorescence different from natural. Otherwise, in a gem g
rade crystal, there are no discernible characteristics that differ
from natural using normal gemological techniques. The Ramaura Ruby is
the only lab ruby that is flux grown, using spontaneous nucleation,
without a seed. It takes 2 months for the various crystal forms to
grow. A very small proportion of the crystals that grow in the
platinum crucible are gem grade, and fewer are what J.O. calls gem
plus. Those are as close to natural as one can imagine, even under the
highest magnification. Growth lines, twinning, color zoning,
fingerprint inclusions, all look like natural ruby. The J.O. Crystal
Co. webpage tells more about the Ramaura Cultured Ruby and there are 2
links at the bottom of the page.. one to a story on the background of
Ramaura ruby and another with a recipe on how to grow it!
http://www.ramaura.com There is an email link on the page too.
I have a specimen cluster of hexagonal plates of Ramaura Ruby up on
eBay if you want to see what the non-gem grade looks like, or I can
send you a direct link to my scans if you email me directly. I'm not
usually interested in lab created stones, but I do love the Ramaura
ruby and Empress cultured emeralds!
| Carol J. Bova @Carol_J_Bova |
|http://www.bovagems.com & The Eclectic Lapidary|