If you have ever bought a piece of jewellery marketed as “hypoallergenic” and then watched your skin react to it anyway, you are not imagining things.
In Australia, there are no strict rules governing the use of terms like “hypoallergenic” or “nickel free” in jewellery marketing. As Blomdahl, one of the world’s most respected skin-safe jewellery brands, noted in an April 2026 report: companies can claim their jewellery is safe for allergies or doesn’t have nickel, even if it’s not true. That is not a niche problem. Nickel is the leading cause of jewellery-related allergies, affecting roughly 15% of the population. And when a plated piece marketed as “nickel free” wears through at the surface, what is underneath may tell a very different story.
The word “hypoallergenic” in jewellery marketing means, in practice, very little. What actually matters is the material — what it is made of, and whether that material is consistent all the way through the piece.
Why Plated “Hypoallergenic” Jewellery Fails
Plated jewellery works by bonding a thin layer of gold or other precious metal to a base metal core. The surface layer is what the skin contacts when the piece is new. The problem is that layer degrades. It wears through with daily use, with sweat, with water, with the friction of skin contact. When it does, the base metal is exposed — and that base metal often contains nickel, brass, cobalt or copper, all common irritants.
As Keyyah Jewellery explains in their Australian guide to sensitive skin jewellery: to bond the gold, a layer of nickel or copper is frequently used, and as the gold plating naturally wears thin over time, this underlying metal is exposed, which can lead to skin reactions. A piece that was genuinely skin-safe on day one may not be on day one hundred. The “hypoallergenic” claim is no longer accurate — but no one puts an expiry date on the label.
“For many of our customers who are unsure whether to purchase, this is one of their first questions,” says Christina, Founder of Quarter Carat. “They’ve worn fashion or plated jewellery in the past and reacted to it. 6K has solved the problem for them — because our alloy is so low-tox. Other than the 25% pure gold, we use hypoallergenic materials that tend not to react with skin at all.”
Why the QC Alloy Is Different
Quarter Carat’s 6K solid gold alloy is proprietary. It took significant testing to develop — not just to achieve the right colour and durability, but to ensure the composition was one that could be worn against skin every day without issue.
“This was a deliberate decision,” Christina says. “We completed many tests to perfect the alloy. We carefully selected the correct amounts of silver, copper and zinc to create pieces that weren’t only a beautiful colour, but had lasting properties and were durable enough for every day — and every day after that.”
The result is an alloy that contains no nickel, no brass, no cobalt — the three most common reactive elements found in fashion and plated jewellery. Gold, silver, copper and zinc. That is it. The composition is consistent all the way through every piece, which means what the skin contacts on day one is exactly what it contacts two years later. There is no coating to wear through, no reactive base metal waiting underneath.
“We do not use nickel, brass or cobalt,” Christina says. “We’ve worked really hard to create an alloy that looks beautiful but is also good to be in contact with every day. That was always part of the brief.”
What to Say to Someone Who Has Already Reacted
If you have reacted to a piece of jewellery marketed as hypoallergenic, the instinct is often to assume you are simply allergic to gold, or to jewellery in general. That conclusion is usually wrong. What you are most likely reacting to is the base metal that was underneath the plating — nickel, cobalt, brass — not the gold itself.
The test that matters is whether you have worn 9K or higher karat gold without a reaction. If yes, there is no reason to expect a reaction to 6K solid gold — because the alloy is structurally similar and contains none of the reactive elements that cause problems.
“I would tell them QC could be the answer,” Christina says. “Many plated pieces have nickel, cobalt, brass or other elements that are not good for skin to repeatedly touch every day. Quarter Carat does not have any of those. It is considered hypoallergenic and is very similar to other higher karat alloys. If you have worn 9K or 14K before and been fine, there would be no issues wearing a 6K piece.”
The Pieces Most Relevant for Sensitive Skin
Earrings are where skin reactions are most common — the post or hook is in direct, sustained contact with sensitive tissue. The Puffed Wide Huggies are solid 6K gold all the way through, including the post. No plated surface. No reactive metal underneath. The same material the day you buy them as the day you stop wearing them — if that day ever comes.
The Fine Paperclip Bracelet is the wrist equivalent for anyone who has had reactions to plated bracelets. Solid gold against the skin, every day, without the degradation risk that plating accumulates over time. Pieces start from $149. The composition never changes. That is the point.
About Quarter Carat
Quarter Carat is Australia’s first 6K solid gold jewellery label, founded by Christina Loccisano and backed by over 30 years of fine jewellery industry expertise. The 6K alloy is a proprietary blend of gold, silver, copper and zinc — no nickel, no brass, no cobalt — solid all the way through, hypoallergenic, and designed for every ordinary moment. Pieces start from $149. Shop at quartercarat.com.au.
Frequently Asked Questions
Is hypoallergenic jewellery regulated in Australia?
No. In Australia there are no strict rules governing the use of terms like “hypoallergenic” or “nickel free” in jewellery marketing. Brands can make these claims without independent verification, which means the term is not a reliable indicator of skin safety. The material composition of the piece itself is what matters.
Why does hypoallergenic jewellery still cause reactions?
Most hypoallergenic jewellery is plated — a thin layer of gold or precious metal over a base metal core that often contains nickel, brass or cobalt. When that coating wears through with daily use, the underlying reactive metal is exposed to the skin. The piece was skin-safe when new; the coating is not permanent. This is the most common reason reactions occur in jewellery marketed as hypoallergenic.
Does 6K gold contain nickel?
Quarter Carat’s proprietary 6K solid gold alloy contains gold, silver, copper and zinc only. It does not contain nickel, brass or cobalt — the three most common causes of jewellery-related skin reactions. This composition is consistent throughout every piece and was deliberately formulated to be worn against skin every day.
Can I wear 6K gold if I have reacted to gold jewellery before?
If you have reacted to jewellery in the past, the cause is most likely a reactive base metal — nickel, brass or cobalt — rather than gold itself. If you have worn 9K or 14K solid gold without a reaction, 6K solid gold should present no issues, as the alloy is structurally similar and contains none of the common reactive elements. If you are genuinely unsure, speak with a dermatologist before purchasing.
What is the best jewellery for sensitive skin in Australia?
For people with sensitive skin or metal allergies, solid gold is one of the most reliable options because the material does not change over time. Look for pieces described as solid gold (not plated, vermeil or gold-filled) with an alloy composition free of nickel, brass and cobalt. Quarter Carat’s 6K solid gold range meets all of these criteria, with pieces starting from $149.