High Pressure Diamond Optics, Inc.
HPDO has manufactured diamond anvil cells for use in analytical studies in the infrared, pressure studies, ultra high pressure studies, measuring Brillouin and Raman spectra, single crystal X-ray diffraction work and magnetic work for over thirty years. These sample holders are accessories designed for use with infrared microscopes and Spectrophotometers.
http://www.hpdo.com/

Diamond compound / diamond paste liquid diamondPolishing
Kemet International manufacture diamond compound, diamond paste, diamond slurry, diamond suspension, liquid diamond, supplying precision surface finishing solutions for flat lapping, ultrasonic cleaning and metallography.
http://www.kemet.co.uk

A&M Instruments Inc.
Manufactures broad range of diamond and some carbide tools for industrial and dental applications. Diamond products include discs, bits, plated mandrels, countersinks, tapered hones, needle files, and mounted points.
http://www.aminstr.com

Lasco Diamond Products Inc.
Shop online for diamond bits, diamond tools, diamond burs, TNT carbide burs, friction grip diamond and carbide burs, electric filing systems, manicuring bits, Micro Delux Nail Machine, industrial burs, dental burs, stone carving tools, bits to fit the Dremel, and core drills.
http://www.lascodiamond.com

Gem Diamond Products
India. Manufactures range of diamond and CBN electroplated tools. Can also supply diamond lapping compounds in oil, water and universal bases, as well as synthetic diamond powder.
http://www.gem-diamond.com

Eastwind Diamond Abrasives
Full line of flexible diamond abrasive disks, belts, dot-disks, & diamond powder. Flexwheel, patented abrasive disk offers the best grinding and polishing wheel on the market. Call Eastwind Diamond Abrasives for your custom abrasive or polishing needs. 802.674.5427
http://www.eastwindabrasive.com/

Patriot Diamond Inc
diamond blades, diamond blade, diamond saw blade, diamond saw blades, diamond wire
http://www.corebits.net/

Lach Diamond Inc.
Polycrystalline diamond tools for all wood and woodlike materials. PCD diamond grinding machines.
http://www.lach-diamond.com

Rex Diamond Mining Corporation
RexMining is A fully integrated diamond mining company, active in all facets of the diamond industry: worldwide exploration, development and mining, polishing and jewelry design
http://www.rexmining.com

Diamond Fields International Ltd.
A Canadian diamond company involved in acquisition, exploration and development of diamond properties in Namibia and South Africa.
http://www.diamondfields.com