Hi I have a piece of 4.160 cts colombian emerald, and I’ve check it
thru a microscope. The emerald contains 3 phase inclusion and many
natural characteristic but I also find some flux at the edge. Does
this indicates syntectic? I’ve run both long and short wave UV but
theres not the slightest reaction. I can also see some colouring
agent (tiny patches of green) is this emerald oiling or opticon? I’ve
been told that syntectic emeralds can contain 3 phase inclusion. Pls
advise.
Most synthetic emeralds (mostly Russian made) are made by a
hydrothermal process and show no flux type inclusions. The coloring is
probabaly Ceder oil with green coloring agent. From your discription
it sounds to be a natural stone. Ed Katz, G.G.
Respected sir, it is true that syn. emeralds do contain three phase
inclusions, but not in all the cases. Since emeralds not only contain
three phase inclusions but it also contains other natural inclusions
such as, pyrite crystals, mica, certain liquid inclusions. coming on to
the color of emerald the patchs of color is common in natural ones. Any
how UV will not help u to differentiate between the natural and the
synthetic one. According to me the emerald which u r holding may be a
natural emerald with syn over coating, this is because u have
mentioned the perticular specimen contains flux inclusions at the
edges. If u need any more details please do contact me. My e-mail
adress is @ravi_kumar.
Natural: The three phase inclusion says so. (How did you come to
the conclusion that the edges have flux?)
Flux synthetic: the flux inclusions have sharp boundries. The
edges are very straight. Flux residues are opague. Usually it has two
phase inclusions if any with an empty space and a dark flux bubble in
it. Also check for metallic crucible residues. (If you like I can
email you a photo to show you the flux fingerprints)
Flux grown synthetic on natural emerald as seed: Then you will
have both kinds of inclusions natural and flux.
hi oya I would really appreciate if you can show me a sample of
the flux inclusion or any other typical syntetic inclusion. thanks
Hi Mike, Your emerald could be;
Natural: The three phase inclusion says so. (How did you come to
the conclusion that the edges have flux?)
Flux synthetic: the flux inclusions have sharp boundries. The
edges are very straight. Flux residues are opague. Usually it has
two phase inclusions if any with an empty space and a dark flux
bubble in it. Also check for metallic crucible residues. (If you
like I can email you a photo to show you the flux fingerprints)
Flux grown synthetic on natural emerald as seed: Then you will
have both kinds of inclusions natural and flux. Kind regards from
Istanbul Turkey, Oya
hi oya I would really appreciate if you can show me a sample of the
flux inclusion or any other typical syntetic inclusion. thanks
Hi Mike, I have sent you a flux synthetic emerald’s picture as email
attachment. I also would like to let my digest friends know that my
web site has been renewed and has a gemology page showing some
inclusion pictures. www.alisails.simplenet.com/oya Kind regards from
Istanbul, Turkey Oya Borahan
...may be a natural emerald with syn over coating, this is
because u have mentioned the perticular specimen contains flux
inclusions at the edges...
Ravi,
Are you referring to a doublet or are you referring to an acutal
coating on the entire stone.
If it is a coating, it is a process which I have not heard of
(probably because I have not had time to keep up). Is it something
that is being commonly done on emeralds now or is it found on older
stones? How is the coating accomplished? How thick? How permanent?
Hope you don’t mind oall of the questions, and thanks for your
answers in advance.