Laboratories & schools

www.aigslaboratory.com
(A.I.G.S. Laboratory)
www.gia.edu
GIA)
www.gemresearch.ch
(GRS)
www.igiworldwide.com
(IGI)
www.ssef.ch
(SSEF)
www.gubelinlab.com
(Gubelin)

Knowledge

www.fieldgemology.org/
Field trips in the mines
http://webmineral.com
About minerals
www.ruby-sapphire.com
The best seller
www.mindat.org
Mineral database
www.themelis.com
Another famous gemologist
http://gemme.la.rca.fr
Blog gemmology and opals
beyond4cs.com
Free gemology courses and resources
www.hubs.com/
3D Printing, CNC machining, injection molding and sheet metal services (FDM, SLS, SLA & MJF).

Forums & Networks

www.gemologyonline.com
The rendez-vous gemology
www.geminterest.com
French equivalent
www.pricescope.com
All about prices
www.diamondse.info
Mostly about prices
http://polygon.net/
All about everything
www.ganoksin.com
All about everything

Associations

www.thaigemjewelry.or.th
(TGJTA)
www.gemstone.org
(ICA)
www.agta.org
(AGTA)
www.gemsociety.org
(IGS)