A "625" hallmark on gold means the item is 15-carat (15ct) gold, containing 62.5% pure gold, with the rest alloyed metals for strength; it's an older standard, mainly found in antique UK jewelry (pre-1932), making it a desirable collector's item.
The 625 gold stamp refers to 15 carat gold (15ct), a gold purity standard used in the UK prior to 1932. The number 625 represents 62.5% pure gold, with the remaining 37.5% of other metals like copper or silver to enhance durability.
750 – 18 karats. 625 – 15 karat gold. 585, 583, 575 – 14 karats. 417 – 10 karat gold (typically the lowest one will find in U.S. markets) 375 – 9 karats.
Because 585 gold is used so often, it has a high value. So you don't have to worry about buying gold jewelry that isn't worth much.
The karat number for gold purity is a percentage. Since 24 karats is the absolute purest form of gold, this is the denominator in the equation. For example, 14 karat gold is 14 parts gold out of 24, or 14 divided by 24, which equals . 585 or 58.5%. As you'll read below, the stamp 585 represents 14-karat gold.
Usually they are a purity hallmark/stamp. 725 would mean 72.5% but that's a strange number to see. You will normally see 750 = 18kt but not 725. That is obviously a 725, not a distorted 925.
585 gold is also known as 14 karat gold. The number 585 refers to the gold content in the alloy, expressed in parts per 1000. In other words, 585 gold is made up of 58.5% pure gold and 41.5% other metals. These other metals are typically copper, silver or palladium.
A gold-filled bangle, for example, may have its original "gold fill" mark scraped away and replaced with a fake "14k 585" stamp to mislead buyers into thinking it's solid gold. The Gold-Plated Clasp: This is a sneaky trick often seen with chains and bracelets.
In the US, 14k gold, also known as 585 gold, is one of the most commonly used gold alloys, alongside 10k gold. It is used for a variety of purposes, including fine jewelry and everyday wear, such as class rings. The current 14k gold price is $83.77 per gram or $2605.36 per ounce.
You might see numbers like 595, 750, or 999 on it. These numbers are really important. They tell you how much of the jewelry is actually gold. For example, 595 means the jewelry is about 59.5% gold, which is the same as 14 karat gold.
Check for hallmarks
A hallmark is a stamp that typically outlines the metal content of a piece and the country of origin, designer, or manufacturer. And British hallmarks on jewelry often include a date stamp, indicating a year of production. There could be other engravings on the item as well.
One of the easiest ways to determine if a piece of gold is real is to look for hallmarks. Most authentic gold items will have a stamp that indicates their karat value, which tells you the purity of the gold. Common Hallmarks: Look for stamps like 10K, 14K, 18K, or 24K. The higher the number, the purer the gold.
Pure gold is notated as 24K – this is the highest karat level for gold meaning it is 100% pure gold. 18K gold is 75% purity level, 14K is 58.3% purity level, and 10K is 41.7% purity level.
Unlike plated or filled gold, solid 585 gold will not tarnish, flake, or wear off over time.
585 gold jewellery retains its colour for many years, even with regular wear. It shows greater resistance to contact with water or cosmetics, which further boosts its value. In addition, unlike lower quality gold, it is not allergenic, due to its lower content of other metals.
To perform the test, place your gold item into a small bowl and add a few drops of white vinegar. Pure gold will not react or change color because it's non-reactive. Fake or low-quality gold, however, may turn black or green.
585 vs 750 Gold in Gold Content and Purity
750 gold has a gold content of 75%, and the remaining 25% is other metals. 750 gold is also called 18k gold. Because the gold content is 16.5% higher than 585 gold, the color will be warmer and more golden.
It definitely can! Buying 585 gold means that you may be spending more or less than you would otherwise, and may also mean that you'll have to take special care with cleaning and maintenance. Fine jewelry typically consists of 14k or 585 due to its higher percentage of fine gold than other precious metals.