Gold Hallmarks Nigeria │ Understanding Your Gold
Gold Hallmarks Nigeria — How to Read Every Stamp
A gold hallmark is a small stamp pressed into the metal of a piece of jewelry that certifies its purity. Every genuine solid gold piece carries one. The three-digit number — 375, 585, 750, or 999 — tells you exactly how much gold is in the piece you are holding.
Finding it and reading it correctly is the single most reliable way to verify that what you are buying is what you are being told it is. This guide shows you what every stamp means, where to find it on any piece of jewelry, which international marks you will encounter in the Nigerian market, and how to use all of this to protect yourself before you hand over your naira.
What Is a Gold Hallmark?
A hallmark is an officially recognized mark stamped into a piece of precious metal to certify its purity and authenticity. The tradition of hallmarking dates to 14th-century England, where the Goldsmiths' Company in London required gold and silver to be tested at Goldsmiths' Hall before sale — hence the term "hallmark."
Today, every major jewelry-producing country operates an assay system that verifies the purity of precious metals and applies certified marks. The specific marks differ by country, but the core system is consistent: a number indicating the parts of pure gold per thousand, pressed into the metal as a permanent stamp.
In the Nigerian market, you will encounter hallmarks from several different assay systems — primarily European (especially Italian and British), Gulf (UAE and Saudi Arabia), Turkish, and occasionally American. Nigeria does not currently have a national assay office, which means Nigerian-made jewelry and imported pieces are not subject to a mandatory domestic hallmarking requirement. This makes understanding the international systems all the more important for Nigerian buyers.
The Gold Purity Stamps — Every Number Explained
The most important thing to understand is the three-digit purity number. This is expressed in parts per thousand — the number tells you how many parts of every thousand in the alloy are pure gold.
| Stamp | Karat | Gold content | What it means | Common on |
|---|---|---|---|---|
| 999 | 24kt | 99.9% | Pure gold — investment grade | Bars, coins, ceremonial pieces |
| 990 | 23.75kt | 99.0% | Near-pure — occasionally seen on East Asian pieces | Some Chinese and Japanese pieces |
| 916 | 22kt | 91.6% | High-karat — common in Gulf market | Dubai, Saudi, Indian jewelry |
| 875 | 21kt | 87.5% | High-karat Gulf standard | Dubai Gold Souk, Saudi market |
| 750 | 18kt | 75.0% | Premium fine jewelry — European standard | Italian, Turkish, European jewelry |
| 585 Ideal | 14kt | 58.3% | Everyday fine jewelry — recommended for Nigeria | Most quality jewelry, US standard |
| 583 | 14kt | 58.3% | 14kt — older or Russian / Eastern European standard | Older pieces, Russian jewelry |
| 417 | 10kt | 41.7% | Minimum for "gold" in the US market | American fashion fine jewelry |
| 375 | 9kt | 37.5% | Entry-level fine jewelry — UK and Commonwealth standard | British, Australian, some African markets |
A note on 585 vs 583: both stamps indicate 14 karat gold. The mathematically precise figure for 14 ÷ 24 is 0.5833, which rounds to 583. Most manufacturers follow the European convention and round up to 585. Both are valid 14kt marks and you will encounter both in the Nigerian market on imported pieces.
Where to Find the Hallmark on Any Piece
| Piece type | Where to look |
|---|---|
| Rings | Inside the band — stamped on the inner surface |
| Chains and necklaces | On the clasp — typically on the flat surface of the barrel clasp |
| Bracelets and bangles | On the clasp, or on the inside surface of a bangle |
| Earrings — studs | On the post, or on the butterfly / push back |
| Earrings — drop or hoop | On the connecting piece, the wire, or the clasp |
| Pendants | On the bail (the loop that connects to the chain) or on the reverse |
| Brooches and pins | On the reverse — often near the pin mechanism |
The stamp is small — often 1 to 2mm in size — and may require good light and magnification to read clearly. A jeweler's loupe makes it straightforward. A smartphone camera zoomed in and photographed under bright light will usually capture the stamp clearly enough to read without specialist equipment.
If you cannot find a hallmark after a thorough search, ask the seller to show you the hallmark before completing the purchase. A reputable seller will do this without hesitation. If they cannot point to a stamp, the karat is unverified.
Karats, hallmarks, gold types, naira pricing and care tips — everything you need before you buy gold jewelry in Nigeria.
Download Free GuideInternational Hallmark Systems in the Nigerian Market
Because Nigeria imports gold from multiple origins, you will encounter marks from several different assay systems. Here is what each system looks like and what to trust.
Italy has one of the world's most rigorous assay systems. A genuine Italian-made piece carries three elements alongside the purity stamp:
- The purity number — 750 for 18kt, 585 for 14kt
- A manufacturer's code — a unique number identifying the specific Italian factory, registered with the Italian assay authority
- An assay office mark — the stamp of the Italian assay office that verified the piece
If a piece described as Italian only has the purity number without the manufacturer's code and assay office mark, the Italian origin is unverified. The gold may still be genuine at the stated karat — but it was not certified through the Italian assay system.
Dubai's assay system is regulated by the Dubai Central Laboratory (DCL). A genuine UAE-certified piece carries:
- The purity number — 916 for 22kt, 875 for 21kt, 750 for 18kt
- A DCL certification stamp — the official mark of the Dubai Central Laboratory
- Sometimes a manufacturer's mark — not always present on all pieces
The Dubai assay system is credible and widely respected. The challenge in Nigeria is chain of custody — a piece purchased in Dubai's wholesale market may or may not arrive with its full documentation intact.
Saudi Arabia's SASO (Saudi Standards, Metrology and Quality Organization) mandates hallmarking on gold jewelry. Pieces carry purity stamps — 875 for 21kt, 916 for 22kt — alongside a SASO certification mark. The structure is similar to UAE but administered separately.
Turkey's assay system is regulated by the Istanbul Gold Exchange and the Turkish Assay Office. Genuine Turkish pieces carry:
- The purity number — 750 for 18kt, 585 for 14kt, 375 for 9kt
- A Turkish manufacturer's mark — often incorporating a crescent and star motif or a numerical code
- An assay office stamp
Turkish hallmarking is credible. As noted in our gold provenance guide, Turkish gold is frequently the actual origin of pieces sold in Nigeria under Italian or Dubai labels — but a well-marked Turkish piece is exactly what its stamps say it is.
You will occasionally encounter British-hallmarked pieces in Nigeria — typically older pieces or jewelry brought back from the UK. British hallmarks are among the world's most comprehensive and include:
- The purity mark — 375 for 9kt, 585 for 14kt, 750 for 18kt
- The assay office mark — a specific symbol for London (leopard's head), Birmingham (anchor), Sheffield (Yorkshire rose), or Edinburgh (castle)
- A date letter — a letter indicating the year of hallmarking, within a specific shaped cartouche
- A maker's mark — the initials or symbol of the manufacturer
British hallmarks are the most traceable of all systems — the combination of marks pinpoints the piece to a specific maker, year, and assay office.
American jewelry does not use the same three-digit purity system. Instead, pieces are typically marked with the karat number and the letter K — "14K," "18K," "10K." These are legitimate marks but follow a different convention. "14K" means 14 karat gold, equivalent to a 585 stamp. American jewelry does not require independent assay certification in the same way European systems do — the karat mark is the manufacturer's declaration rather than a third-party certification.
Other Marks You May Encounter
Not every stamp on a piece of jewelry is a gold purity mark. Other marks you may encounter include:
| Mark | What it means |
|---|---|
| 925 | Sterling silver — 92.5% pure silver. Not gold. |
| 950 / Pt950 | Platinum — 95% pure platinum. Not gold. |
| 14KGF / GF | Gold-filled — not solid gold. A thick gold layer mechanically bonded to base metal. |
| GP / GEP | Gold plated / gold electroplated — a thin gold layer over base metal. Not solid gold. |
| HGE | Heavy gold electroplate — thicker gold plating, still not solid gold. |
| GR / RGP | Gold rolled / rolled gold plate — a thin gold layer mechanically applied. Not solid gold. |
| No mark | Karat unverified. May be gold, may not be. Treat as fashion jewelry until proven otherwise. |
What No Hallmark Means — and What to Do
A piece with no hallmark is a piece with an unverified karat claim. It may still be genuine gold — older pieces, particularly those made before hallmarking was enforced, sometimes lack stamps. Pieces made by small artisan jewelers without access to assay facilities may also be unstamped.
But the absence of a hallmark removes the only objective verification you have at the point of purchase. Your options:
- Ask the seller to provide documentation — a receipt, a certificate, or any paperwork that states the metal type and karat.
- Compare the price to fair gold value — if it is priced significantly below what solid gold should cost at the claimed karat and weight, that is a strong signal. A 14kt 2-gram piece starts from approximately ₦555,000 at current rates.
- Have the piece professionally assessed — at an Azarai showroom, our team can examine any piece and give you an honest reading.
- Treat it as fashion jewelry — pay a fashion jewelry price, not a fine jewelry price.
Never pay solid gold prices for an unstamped piece on the basis of a seller's verbal assurance alone.
Hallmarks in the Nigerian Market — What to Expect and What to Watch For
Nigeria does not currently have a national assay office or a mandatory domestic hallmarking requirement. This means that jewelry manufactured in Nigeria and sold in Nigerian markets is not legally required to carry a certified purity stamp — unlike in the UK, Italy, or the UAE, where hallmarking is mandated by law. A jeweler in Lagos can mark a piece with any karat number and there is no independent body verifying it. This is the fundamental consumer protection gap in the Nigerian jewelry market.
For imported jewelry — pieces that entered Nigeria from Dubai, Italy, Turkey, Saudi Arabia, or elsewhere — the hallmarks from the country of origin are the relevant verification. A piece with a legitimate 750 DCL stamp from Dubai is certified by the Dubai Central Laboratory. A piece with a 585 and Italian manufacturer code is certified by the Italian assay system. These international certifications are meaningful even without a Nigerian assay overlay.
The most common scenario our team encounters: a client brings in a piece stamped with a purity number — 585 or 750 — but with no accompanying assay office mark or manufacturer code. This means the purity mark is a manufacturer's declaration, not an independently certified hallmark. In most cases with reputable imported jewelry, this still indicates genuine gold at the stated karat. But the verification chain is shorter than on fully certified pieces, and the buyer has less protection if the mark is inaccurate.
The practical guidance for Nigerian buyers: prioritize pieces that carry both the purity number and additional marks — a manufacturer's code, an assay office stamp, or a country-of-origin mark. When buying from a reputable jeweler, always request a receipt that states the metal type and karat. At Azarai, every piece is documented and our team can explain the hallmarks on any piece in our collection.
Karats, hallmarks, gold types, naira pricing and care tips — everything you need before you buy gold jewelry in Nigeria.
Download Free GuideFrequently Asked Questions
The 585 stamp indicates 14 karat gold — 585 parts per thousand are pure gold, which equals 58.3% gold content. It is the recommended karat for everyday fine jewelry in Nigeria. A 585 stamp is the hallmark you are looking for on engagement rings, wedding bands, chains, and bracelets intended for daily wear.
The 750 stamp indicates 18 karat gold — 750 parts per thousand are pure gold, which equals 75% gold content. This is the prestige tier in Azarai's gold range — richer color, higher gold content, and higher price. 750 is the standard hallmark for fine jewelry across European markets, including Italian and Turkish manufacturing.
The 375 stamp indicates 9 karat gold — 375 parts per thousand are pure gold, which equals 37.5% gold content. This is the lowest karat classified as fine jewelry in most markets. It is genuine gold with a real hallmark, but it has the lowest gold value of the four common karats and a paler yellow color than higher karats.
Cross-check the hallmark with the price. A genuine 14kt piece at current gold rates starts from approximately ₦555,000 for a 2-gram piece. If a piece stamped 585 is priced at ₦50,000, the stamp is likely fraudulent. A complete certified hallmark also includes more than just the purity number — look for an assay office mark and manufacturer code on Italian, Turkish, or UAE pieces. The purity number alone means the karat is the manufacturer's declaration, not an independently verified assay.
Both stamps indicate 14 karat gold. The mathematically precise figure for 14 ÷ 24 is 0.5833. Most European manufacturers round up to 585 by convention. Some older pieces and Russian or Eastern European jewelry use 583 instead. Both are legitimate 14kt marks — if you encounter a 583 stamp, it is the same karat as 585.
Not mandatorily. Nigeria does not currently have a national assay office or a legally required hallmarking system. A Nigerian jeweler may stamp pieces with karat marks, but these are manufacturer's declarations rather than independently certified hallmarks. This is why buying from a reputable jeweler who provides written documentation of the metal and karat matters more in Nigeria than in markets with mandatory assay systems.
Treat it as an unverified piece and price accordingly. Ask the seller for written documentation of the karat. Compare the price to fair gold value — a piece priced well below solid gold rates at the claimed karat is likely not solid gold. If you want certainty, bring the piece to an Azarai showroom or another reputable jeweler for assessment before completing the purchase. Never pay fine jewelry prices for an unstamped piece on verbal assurance alone.