TABLES OF GEMSTONE IDENTIFICATION GUNTHER

Tables of gemstones identification.

Birgit Gunther - 3° edition - 256 pages, 135 colored tables German/English version

A collection of data with color spectra enabling gemmologists to identify precious stones, synthetic stones, artificial products and other imitations. 

It's an excellent masterpiece for practical work, containing the dates of more than 240 precious stones, varieties, syntheses and imitations.