[Rockhounds] Man-made gems

[Paul]

Shigley J. E. A review of current challenges for the
identification of gemstones. Geologija. Vilnius. 2008.
Vol. 50. No. 4(64). P. 227–236. ISSN 1392-110X.
http://mokslozurnalai.lmaleidykla.lt/geologija/2008/4/5115
http://mokslozurnalai.lmaleidykla.lt/publ/1392-110X/2008/4/227-236.pdf

Bernardino, N.D.E., Izumi, C.M., de Faria, D.L. and
de Faria, D.L., 2016. Fake turquoises: an example
of Raman Microscopy applied to gemology. Forensic
Science International, 262, pp. 196-200.
https://www.researchgate.net/publication/299403556_Technical_Note_Fake_turquoises_investigated_by_Raman_microscopy

Yours,

Paul H.