Lapidary Journal Excellent and extensive site with pages of links from mineralogy to general science.
Columbia-Willamette Faceters Guild Nonprofit organization dedicated to the advancement of faceting gemstones through education
Gram Faceting Specializes in quality gem rough and cut gemstones
UK Facet Cutters Guild
Gearloose Faceting Machine Plans
Jarvi Tool Company Facetron Faceting Machines
Poly-Metric Instruments Poly-Metric Faceting Machines
Ultratec-facet.com Ultra Tec factory website