Diamond Innovations, Inc. manufactures and supplies diamond, cubic boron nitride and polycrystalline products. The company is headquartered in Worthington, OH.

Baker Hughes, Inc. is a private company headquartered in Houston, TX. The firm manufactures oilfield equipment.

National Institute for Materials Science (物質・材料研究機構 Busshitsu-zairyō kenkyū kikō) is an Independent Administrative Institution and one of the largest scientific research centers in Japan.

Part of The Swatch Group AG, Nivarox-FAR SA is a company headquartered in Le Locle, Switzerland. The firm produces oscillating and escapement parts.

EHWA Diamond designs and manufactures diamond tools for the semiconductor and solar industries.

Diamond Trading NV is a Belgian private company located in Antwerp. The firm distributes diamonds. Jean-Louis van Strydonck and Daniel de Belder are the current co-CEOs of the firm.

Element Six produces and designs synthetic diamonds and supermaterials.

De Beers UK Ltd. markets and sells diamonds. The firm has facilities in Botswana, Namibia, Russia, China, and Thailand. The company was founded in 1888 and is headquartered in London, the United Kingdom.

QED Technologies International, Inc. is an American company located in Rochester, NY, that develops polishing and metrology technology for semiconductors. It was founded in 1996 by Donald Golini and Lowell A. Mintz. Bertrand Loy is currently the CEO of the firm. CMC Materials, Inc., part of Entegris, Inc. since July 2022, acquired QED Technologies International, Inc. on July 10, 2006 for $23.50 million.

Alrosa engaged in the exploration, mining, manufacture and sales of diamonds. Its operations include five Integrated Mining and Processing Complexes: Mirny, Udachny, Aikhal, Anabar and Nyurba located in the Sakha Republic; sorting divisions and diamond cutting and polishing division. The Company is a member of variable diamonds associations.

Mitsubishi Materials Corp. engages in the manufacture and sale of cement, metals, ceramics, and other industrial materials. It operates through the following segments: High-Performance Products, Processing business, Metal business, Cement business and Other business. The High-Performance Products segment manufactures and sells copper processed products, functional materials, electronic devices, chemical products, polycrystalline silicon and Aerosil. The Processing business manufactures and sells carbide products and sintered products. The Metal business smelts and sells Copper, gold and silver. The Cement Business segment manufactures and sells cement and ready-mixed concrete. The Other Business involves in geothermal and hydroelectric power generation business, environmental recycle business, real estate, Civil engineering, construction, repair work and geological survey. The company was founded by Yataro Iwasaki in May 1871 and is headquartered in Tokyo, Japan.

Changsha Ruihe Diamond Tools Co., Ltd., established on 2001-01-10, Business scope includes diamond drilling tools,Special equipment for geological exploration,Special equipment for oil drilling,superhard abrasives,artificial superhard material,Forgings and powder metallurgy products,Manufacture of special equipment for ocean engineering;General Machinery,Sales of mechanical and electrical products;Wholesale of chemical products;Machinery Parts Retail;Sales of products produced by the company(Except for projects prohibited by national laws and regulations;Products involving licensed operation need to obtain a license before they can be operated);Self-operated and agent import and export of various commodities and technologies,Except for the goods and technologies that the state restricts the company to operate or prohibits the import and export of.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Sichuan Chuanqing Petroleum Drilling Technology Co., Ltd., established on 1997-09-02, Business scope includes general cargo,Lifting(Operate within the validity period of the license);software development;Production,Sales:Special equipment for oil drilling,Oilfield Chemicals(Free of Hazardous Chemicals,Precursor chemicals and flammable and explosive substances);Mechanical parts processing;Mechanical equipment maintenance;Research on well control equipment and technology,design;Research on Drilling Technology;Drilling Engineering Technical Services;Drilling equipment test,test;plant,the vehicle,land,Equipment Leasing;Import and export of self-operated goods,However, the state restricts the company to operate or prohibits the import and export of goods except.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Part of Schlumberger NV, Schlumberger Technologies, Inc. is a company headquartered in Moorestown, NJ, that provides oilfield services such as distributing oil and gas information technologies and providing consulting services.

Beijing Huayou Guanchang Environmental Protection Energy Technology Development Co., Ltd., established on 2002-08-20, Business scope includes technology development,Technology Promotion,technology transfer,technical consulting,Technical Services;Sales of chemical products(Does not contain dangerous chemicals and a class of precursor chemicals),electronic product,Equipment.(Enterprises independently choose operating projects according to law,Carry out business activities;Items subject to approval by law,Carry out business activities in accordance with the approved content after approval by relevant departments;Do not engage in the business activities of projects prohibited and restricted by the city's industrial policies.)

Varel International Ind LP, part of RA Holding Corp., is a company headquartered in the United States providing investment services.

Shenzhen Feiboer Jewelry Technology Co., Ltd., established on 2008-09-08, Business scope includes general business items:jewelry instrument,Technical Development of Teaching Equipment,Sales;Jewelry,handcrafted gift(Except for ivory and its products),mineral specimen,Technical Development of Precious and Jade Specimens,Sales;Domestic Trade;Import and export of goods and technology.,The licensing program is:microscope,Technology development of refractometer,production and sales(Does not contain medical equipment);gem microscope,gem refractometer,gemstone polarizer,Gem beam splitter,Technical Development of Diamond Color Comparing Lamp,production and sales(Does not contain medical equipment),Provide door-to-door maintenance service.

Fort Wayne Wire Die, Inc. is a private company headquartered in the United States. The firm manufactures and distributes diamond dies.

Shan Dong Yan Neng Tai De Zhong Gong You Xian Gong Si, established on 2004-01-14, The business scope includes mining drilling rigs,drill pipe,drill,pick,water treatment equipment,fiberglass anchor,drilling tool,Rig Accessories,Motorcycle Parts,Industrial and mining accessories,Coal seam water injection sealing equipment,Mine dust-proof grouting equipment,Mining machinery and equipment manufacturing,Sales,repair,Technical Consulting and Technical Services;Sieve plate,sieve,steel,metallic material,building decoration materials,Wujinjiaodian,Chemical Products,Chemical raw materials,Labor protection products,Local products,Daily necessities,Office Supplies Sales;Own house rental;Import and export of goods and technology(Except for goods or technologies that are restricted or prohibited by the state);Power supply project;Power distribution project.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)