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The EGL USA booklet "Changing the Color of Diamonds: The High Pressure High Temperature Process Explained," published by EGL Press in 1999, was one of the first efforts to educate the jewelry trade on the subject.


Publications

EGL USA provides consumers and the trade with educational information on a wide variety of educational topics, from buying a diamond to diamond treatments.

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To order a copy or copies of any EGL USA publication, call 212-730-7380 Ext. 220 or e-mail us at egl@eglusa.com