Books

Geoscienze - geoscienziati curiosità by Antonio Scaglioni
Only available in Italian Language!

Opali S. Aracic, traduzione L. Gabrijelcic - 2012 - 340 pagine
Only available in Italian Language!

SCHEMI DI TAGLIO VOL. II Edizioni Gemmarum Lapidator. 34 schemi - 38 pagg.  In Italian Language!
34 schemi ripresi da riviste americane del settore di sicuro interesse e di grande effetto.

Opl a student's guide to spectroscopy by Colin H. Winter, FGA, DGA - 85 color pages
SECOND EDITION

Slovak opal by Luigi Costantini - 143 pages, 336 color images

Friedrich Mohs 1773-1839 by A. Berstein, D. Giordano, R. e V. Zancanella, F. Scussel, L. Santomaso e D. Perloran - 2004 - 1° italian edition - 88 pages
Only available in Italian language!

Gemme create by Alberto e Luisa Molossi - 60 color pages a colori

This wall chart contains superbly detailed photomicrographs showing internal features observed in natural, treated, and synthetic sapphires.
Published in the Summer 2017 issue with the article by Nathan D. Renfro et al., ìInclusions in Natural, Synthetic, and Treated Sapphire," 

Over 1400 Colors Available
Two years in development, this new color communication system, based on Munsell has over 1,400 colors in this master comparison book of colors. Each of 40 pages has its own unique overlay chart, developed by color specialists and adapted for use in the jewelry industry by our own team of experts.
The transparent overlay chart gives the name of the color.

This wall chart contains superbly detailed photomicrographs showing internal features observed in natural, treated, and synthetic Opal.

This wall chart contains superbly detailed photomicrographs showing internal features observed in natural, treated, and synthetic diamond.

GIA Features of Synthetic Diamonds - Poster