Firemountaingems do a 6mm x 6mm emerald hart shaped synthetic (they
call it imitation) emerald
I was wondering if we were going to see a year go by without
bringing up the synthetic/imitation/simulant subject again, but it is
important for the person who is looking for an actual synthetic to
know why this particular item won't work for them.
Imitations are not synthetics. What Fire Mountain Gems is selling
there is what some dealers call "soudee emerald," and that is what
gemologists refer to as a synthetic spinel triplet. It is, in fact,
two pieces of colorless synthetic spinel that has been cemented
together at the girdle with green glue. Immersing these stones in
liquid with a refractive index close to that of spinel (such as
methylene iodide) causes the spinel to visually "disappear," while
the green glue appears as a flat, green sheet. Pretty cool, actually.
Gemologically speaking (there goes that qualifier again), a
synthetic gemstone must meet four criteria: First, it must have a
natural counterpart. If a man-made, lab-created, etc., gem material
has no natural counterpart, it is not referred to as synthetic by the
gemological community (detroitite comes to mind, as does zincite).
Second, third and fourth, it must have the same chemical, optical
and physical characteristics as its' natural counterpart. So, since
Fire Mountain Gems' product is an assembled spinel designed to
resemble emerald, it is an imitation, not synthetic.
James S. Duncan, G.G
James in SoFL