Basically, introduction of iron produceses red
Um… Jerry? Last time I checked, the usual source of the fine red of
good ruby is chromium, not iron. Iron modifies the reds, adding
brownish tones, and also reduces U.V. fluorescence. But I don’t think
you get a fine red from just iron alone. Maybe I’m wrong about that.
But Chromium is the colorant traditionally associated with fine ruby
(and oddly, also with the fine green of emerald…)
Peter
Wayne,
The question you should be asking yourself is, what I’m doing to a
stone that’s not a diamond to enhance its properties, no matter what
you do, you still have a sapphire that can be identified within
seconds of looking thru a Lupe. I commend your cutting ability and
hope you see my point, no sapphire will stand up to a well polished
diamond. I been wrong before, but I’m willing to learn.
Thanks.
mark
Merely turning a diamond red seems to mean it fetches premium price. Conversely the natural yellow-brown colour of Argyle diamonds from Oz seems to have arbitrarily lowered their price.
“Merely” is an interesting word in this context. Gemstone value
depends on lottery than Nature likes to play. Only very few
gemstones can win good looks in this lottery, and therefore high
value assigned to them. For a diamond to get red color is akin to
wining state lottery top prize 10 times in a row and than some.
Leonid Surpin
Maybe I should start signing myself Tony Konrath F.G.A. (Fellow of the Gemmological Association - the UK equivalent of the G.I A.) Unless the color comes from chromium it's not designated as ruby.
Tony Konrath, perhaps the above, not correct.
Dear Richard, Your email has been passed onto me. It is the
appearance of colour in Corundum that gives the various names
rather than their absorption spectra seen with a hand held
spectroscope. It is only by historical accident that the red ones
are called RUBY. Where RUBY ends & PINK SAPPHIRE begins is purely
arbitrary. With various laboratory equipment, even subtitles of
chemical composition can be detected. I hope this is
of use.
Doug Douglas J Garrod FGA DGA
Senior Education Executive
The Gemmological Association of Great Britain
Richard Hart G.G.
Denver, Co.
You’re right of course. Must have been late when I wrote that. I
know better. I stand corrected.
good ruby is chromium, not iron. Iron modifies the reds
Jerry in Kodia
"Merely" is an interesting word in this context. Gemstone value depends on lottery than Nature likes to play. Only very few gemstones can win good looks in this lottery, and therefore high value assigned to them. For a diamond to get red color is akin to wining state lottery top prize 10 times in a row and than some.
A blue-white diamond can be created by placing a white diamond near
a reactor core… pity it only stays this way for a week 
CIA
Red emeralds - better called red beryl. I have two synthetic ones.
Pretty too.
There is natural red beryl - called bixbite. It is exceedingly rare,
comes from a mine in Utah.
Judy Hoch, GG
Diamonds are now within mans ability to be grown in any color one
wants. Reds are available online and are in fact selling well. It’s
true that the company has to by law laser inscribe the girdle to
identify that fact. The main thing to remember about all this science
is that growing a diamond is not so hard to do as getting the purity
and repeatable results, and also manmade diamonds are worth more for
the properties needed in the telecommunications arena phones, laptops
and the like. Blue diamond’s as I mentioned before are the result of
adding Boron to the mix, which allows them to carry an electric
charge at speeds never seen before. It’s a great time to be alive.
Mark
and i am fortunate as the distrubuter for d.nea synthetic diamonds
just moved to their only storefront (mostly online sales) location to
10 miles east of my house.
John