Gold bullion bars, direct from Africa, below spot.

Cast bars, minted bars, and the institutional standard

Gold bullion exists in two primary forms: cast bars and minted bars. Cast bars are poured directly from molten gold into moulds and allowed to cool. They are heavier, lower in fabrication premium, and preferred by institutional buyers and central banks for large-denomination holdings. Minted bars are cut from rolled gold sheet and stamped with fine finish; they carry a higher fabrication premium and are typically purchased by retail investors and collectors.

For institutional buyers, cast bars in denominations of 1 kilogram and above represent the most efficient store of value. The London Good Delivery standard — maintained by the LBMA — sets the international benchmark: bars between 350 and 430 troy ounces (approximately 10.9–13.4kg), minimum 99.5% purity, produced by an LBMA-accredited refinery, with serial number, assay mark, fineness, and year of manufacture stamped on the bar.

The 10-kilogram cast bar is the dominant format for African gold exports. It is large enough to be efficient from a transportation and documentation standpoint, and small enough to be acquired on a single institutional decision without requiring committee escalation at most family offices and mid-size dealers. The format is accepted by all major refineries, vault operators, and licensed bullion dealers globally.

The direct-from-Africa bullion advantage

African gold supply carries a structural discount that reflects the friction of bringing it to market: export permitting, assay certification, specialist carrier logistics, and access to compliant international buyers willing to transact under a formal settlement framework. Buyers who can absorb that friction — or work with a counterparty like OnePiece that has already resolved it — capture that discount as immediate below-market cost basis.

OnePiece qualifies supply before it reaches buyers. Our current mandate is fully documented: the gold is export-permitted, independently assayed to investment-grade standard, and ready for carrier collection. Settlement is structured through bank escrow. Delivery is handled by specialist carriers — Brinks, Malca-Amit, or equivalent — to the buyer's nominated facility. There is no auction, no public bid list, and no third-party intermediary between buyer and seller beyond OnePiece as mandate holder.

The documentation package includes the independent assay certificate, mineral export permit, bill of lading or airway bill, and insurance certificate. These are the documents an institutional buyer's compliance and legal teams require to clear the transaction through their AML/KYC frameworks.

Bullion bars vs coins vs ETF for institutional buyers

For institutional allocation, physical bars dominate for straightforward reasons. Gold coins carry numismatic and fabrication premiums — sometimes 3–8% above spot — which erode the efficiency of a large-scale position. ETFs and other paper gold instruments impose ongoing management fees, introduce counterparty risk (the ETF issuer, the custodian, the prime broker), and in a redemption scenario require navigating a queue of institutional sellers simultaneously. They track the gold price but they are not gold.

Physical cast bars purchased below spot and held in an allocated vault or delivered to a private facility carry none of those costs or risks. There is no management fee. There is no counterparty. The gold is yours, documented, insured, and auditable. For a buyer acquiring 10 kilograms at USD 5,000/kg below spot, the immediate unrealised gain at current LBMA spot is USD 50,000 — a return that no ETF can offer at the point of acquisition.