Fine Gold (999)
Also: 999 gold, 24 carat, .999 fine gold, 9999 gold
Fine gold denotes gold with a fineness of at least 999 thousandths (999 ‰), meaning a purity of 99.9 per cent or higher.
Fine gold is the purest commercially traded form of gold and underpins every price quotation on the world market. The gold price is always given in US dollars per troy ounce of fine gold — regardless of whether an investor buys bars, coins or a security. To establish the actual material value of a gold object, you first need its fineness, which you can then feed into the melt value calculator.
What does "999" mean as a fineness?
The three-digit mark 999 (or 999.9) stands for parts of pure gold per thousand of total weight:
Fine weight = gross weight × (fineness ‰ ÷ 1000)
Example: 31.103 g (1 troy ounce) × (999 ÷ 1000) = 31.072 g pure gold
In practice the market distinguishes two tiers:
| Mark | Purity | Name | Typical products |
|---|---|---|---|
| 999 | ≥ 99.9% | Three nines / fine gold | Standard bars, many bullion coins |
| 999.9 | ≥ 99.99% | Four nines | Bullion coins (Maple Leaf, Philharmonic), kilo bars |
| 999.99 | ≥ 99.999% | Five nines | Speciality bars for laboratories and the semiconductor industry |
The LBMA Good Delivery standard for wholesale bars (400-ounce bars on the London market) requires a minimum of 995 ‰ — fine gold comfortably exceeds that requirement.
Why is fine gold so soft?
Pure gold is among the most ductile of all metals: a single gram can be drawn into a wire about two kilometres long or beaten into a sheet roughly one square metre in area. Its Mohs hardness is only 2.5 — a fingernail (Mohs hardness ~2.5) will already leave scratches. In jewellery making, gold is therefore almost never used as fine gold but is alloyed with copper, silver or palladium (→ 585 gold, 750 gold). For investment products the softness is no drawback, provided the coins or bars are stored properly.
Investment gold: a special tax position
In Ireland — and across the EU — fine gold in the form of investment gold enjoys a VAT exemption under the VAT Consolidation Act 2010 (implementing EU Directive 2006/112/EC). The conditions are:
- Gold bars or wafers with a fineness of at least 995 ‰
- A weight of at least 1 gram
- Coins with a fineness of at least 900 ‰, minted after 1800, that are or have been legal tender
Since fine gold (999 ‰) far surpasses these thresholds, all common investment bars and bullion coins made of fine gold are VAT-exempt in Ireland. Note: this is not tax advice; for individual questions please consult a tax adviser or the Revenue Commissioners.
Typical fine-gold products
Bars are the classic form: supply ranges from 1-gram credit-card bars to the 12.5-kilogram wholesale bar. Cast bars (recognisable by their rough surface) and minted bars (mirror-smooth faces, sharper edges) both reach 999.9 ‰. Leading refineries such as Heraeus, Umicore, PAMP Suisse and Valcambi supply their products with an assay certificate and a serial number.
Coins made of fine gold have become an important investment form since the 1970s:
- Maple Leaf (Canada, since 1979): 999.9 ‰, special edition 99999 (five nines)
- Vienna Philharmonic (Austria, since 1989): 999.9 ‰, Europe's best-selling gold coin
- American Buffalo (USA, since 2006): 999.9 ‰, the first US fine-gold coin
- Kangaroo/Nugget (Australia, since 1986): 999.9 ‰, design changes annually
The Krugerrand (South Africa, since 1967), by contrast, contains 91.67% gold (916.7 ‰ = 22 carat) — it is not fine gold, but despite its higher gross weight of about 33.93 g it holds exactly 1 troy ounce of pure gold.
Verification and authenticity
Fine gold can be verified in several ways:
- Hallmark check: the mark 999 or 9999, possibly combined with a maker's logo and serial number
- Density measurement after Archimedes: fine gold has a density of 19.32 g/cm³ — tungsten comes close at 19.25 g/cm³, but the two can be told apart reliably by ultrasound or X-ray fluorescence (XRF)
- Magnet test: gold is diamagnetic and is not attracted to a magnet; if a piece reacts to magnets, it contains foreign matter
- Ping test: genuine fine-gold coins produce a clear, long-lasting tone
With the gold calculator you can quickly check whether the dealer's asking price matches the current spot price.
Fineness versus carat: the conversion
The carat value (for gold jewellery) and the per-mille mark (for bars and coins) describe the same thing in different systems:
| Carat | Fineness ‰ | Purity % |
|---|---|---|
| 24 kt | 999 – 999.9 | 99.9 – 99.99 |
| 22 kt | 916.7 | 91.67 |
| 18 kt | 750 | 75.00 |
| 14 kt | 585 | 58.50 |
| 8 kt | 333 | 33.30 |
Fine gold therefore always corresponds to 24 carat — in theory 24 carat could even mean 999.999 ‰, since carat is a fractional representation (24/24). In trading practice, 24 carat means 999 ‰ or better.
In brief
Fine gold (999) is the purest regularly traded gold, forms the basis of every world-market price and enjoys VAT exemption in Ireland as investment gold. Anyone buying or selling fine-gold bars or coins should always keep the current gold price and the melt value calculator to hand in order to judge premiums realistically.