18K Yellow Gold Chain

How to recognize an 18-karat yellow gold chain

18-karat gold corresponds to a 750 fineness: 75% pure gold, with the remainder made up of copper and silver alloy to hold its shape without warping under everyday wear. In France, this fineness comes with an official hallmark, the eagle’s head, used since 1838 to identify gold pieces made in France. On a fine chain, this hallmark is often located near the clasp, barely visible to the naked eye.

750 fineness versus 375 and 999

9-karat gold (375/1000) costs less and holds up well to knocks, but its tone leans toward pale yellow and fades over the years. Pure 24-karat gold (999/1000) has the most intense shine, but it bends under the pressure of a finger: impossible to turn into a wearable chain. 18-karat gold sits between the two, hard enough to keep its shape for years, pure enough to keep a rich yellow color.

What occasion calls for this chain

A christening, a communion, a birth: these are the three moments when an 18-karat gold chain most often changes hands in France. Unlike a fashion piece, it isn’t designed for a season but to stay with its owner for decades, from a child’s first wear through to adulthood, even if the length needs adjusting along the way.

Which link style to choose for a medal or a cross

The choice of link style depends first on what the chain will carry. A heavy christening medal, 20 to 22 mm, needs a link sturdy enough to handle daily wear without opening; a light 14 mm pendant can work with a finer link.

Curb link: round or oval rings

The curb link is made by interlacing identical rings, round or slightly oval. In its classic version, it stays understated and suits both men’s and women’s wear. In its diamond-cut version, the rings are faceted after assembly: it catches more light, but wears down a bit faster from friction, as the faceted surface is thinner.

Figaro link: flattened links

The figaro link is made of flattened links that lie flat against the skin rather than rolling on themselves. This shape makes it more resistant to twisting than a curb link of equivalent weight, which is why it’s often paired with a christening medal worn daily.

Rope link and finer variants

The rope link, with its tight twist, gives a look close to a continuous thread. It suits wear on its own, without a heavy pendant: its thin profile isn’t built to bear the weight of a cross or a thick medal over time.

What length for a child or an adult

Length should be chosen based on the wearer’s age and the growing room you want to allow, not just the neck size on the day of purchase.

Children’s chain: 40 to 45 cm

For a christening, a 40 cm chain works from the first months and remains wearable for several years before becoming too short. A 45 cm length leaves more room to grow and can stay with the child right through to the teenage years without needing to be replaced.

Adult chain: from choker-length to a softer drape

• 42 to 45 cm for a close-to-the-neck, feminine fit that shows off a short pendant
• 50 cm for a softer drape, for men or women, suited to an open collar
• 55 to 60 cm for a longer style, more often chosen by men, letting the chain fall below a shirt collar

Weight, engraving, and everyday care

A weight suited to the pendant

One simple rule avoids a lot of disappointment: the chain’s weight should exceed that of the medal or cross it carries. A chain that’s too thin under a heavy pendant stretches at the links near the clasp and eventually gives way, often after just a few months of daily wear.

Engraving on the back of a medal

A christening medal is usually engraved on the back, with the first name and the date of the ceremony. Available space stays limited on a 14 to 18 mm diameter: it’s best to plan for short, legible text rather than a full date plus a message.

Cleaning and preserving the shine

A soft cloth is enough for routine care. If it starts to dull, a lukewarm, lightly soapy water bath followed by a clear-water rinse restores the original shine. Perfumes and creams contain solvents that dull gold over time: it’s best to apply them before putting the piece on, and to remove it before swimming or sports, where chlorine and sweat speed up wear on the clasp.

Frequently asked questions about 18-karat gold chains

How can I check that a chain is genuinely 18-karat gold?

Look for the eagle’s head hallmark, stamped near the clasp on jewelry sold in France. It certifies a 750 fineness; a different hallmark, such as the scallop shell for 9-karat gold, indicates a different fineness.

Why not 24-karat gold for a chain?

Pure 999/1000 gold is too soft to hold its shape under the strain of everyday wear. The 750/1000 alloy adds copper and silver, which stiffens the metal without darkening its color too much.

Curb link or figaro link for everyday wear?

The figaro link resists twisting better thanks to its interlocking flattened links. A classic curb link is sturdy too, as long as the wire diameter is thick enough: a curb link that’s too thin gives way faster than a figaro of comparable weight.

Does a christening chain need to be thick?

Not necessarily thick, but sturdy enough to carry a medal or cross without risk of breaking. A thin chain works fine if the pendant is light too; for a medal of 20 mm or more, a figaro link or a wider-gauge curb link is a better choice.