Registered Companies
Flux International works with leading antique and rare metals companies worldwide — purchasers, testers, refiners, and certification bodies. These companies are registered under our platform for international metals transactions and settlements.
Antique & Rare Metals Companies
Every company listed below is a verified, registered entity under Flux International, specializing in the purchase, testing, refining, or certification of antique and rare metals.
Borcelle Rare Metals
Rare & Antique Metals
Purchasing, testing & certification of rare and antique metals
European Metal Recycling (EMR)
Metals Recycling & Trading
World's largest metals recycler — ferrous, non-ferrous & precious metals
Johnson Matthey
Precious Metals & Sustainability
Precious metals refining, assaying, and advanced testing technologies
Umicore
Metals Refining & Recycling
Refining and recycling of precious and specialty metals
Heraeus
Precious Metals Technology
Precious metals processing, testing, and high-purity refining
Metalor Technologies
Precious Metals Refining
Refining, testing, and trading of gold, silver, and PGMs
Tanaka Precious Metals
Precious Metals Management
Precious metals refining, testing, and antique metal appraisal in Asia-Pacific
PAMP SA
Precious Metals Refining
World-renowned gold refining, assaying, and authentication
Asahi Refining
Precious Metals Refining
Gold and silver refining with expertise in antique metal recovery
Aurubis AG
Copper & Metals Processing
Europe's largest copper producer — recycling and testing of complex metal alloys
The Royal Mint
Sovereign Mint & Precious Metals
Over 1,100 years of heritage — coin striking, gold refining & antique metal authentication
Rand Refinery
Gold & Precious Metals
Africa's premier gold refinery — LBMA-accredited with antique gold testing
MMTC-PAMP India
Precious Metals Refining
India's only LBMA-accredited gold and silver refinery — hallmarking & antique metal testing
Boliden
Mining & Metals Smelting
Nordic mining giant — smelting, refining & testing of complex heritage metal ores
Argor-Heraeus
Precious Metals Refining
LBMA top-tier refiner — gold, silver, platinum & palladium with antiquity expertise
Valcambi SA
Precious Metals Refining
World's largest single-site precious metals refinery — assaying & antique metal testing