When clients visit our Dianoche Artelier on Kreta Ayer Road to design a bespoke diamond ring, they sometimes ask an understandable question: "Can you make this ring out of pure 24K gold?"

While pure gold is the ultimate noble metal, the short answer for fine diamond jewelry is no [1, 2]. If you want a piece that lasts a lifetime without losing its stones, you must understand the science of gold alloys. Here is the insider truth about how gold is blended, why certain karats are better for your diamonds, and how different cultures define luxury.

Gold is a naturally noble metal, but in its purest form, it is incredibly soft and malleable.

If we were to craft a delicate engagement ring out of pure 24K gold, the everyday wear and tear of life in Singapore would quickly warp the band. More importantly, it is highly discouraged to set precious gemstones and diamonds in gold that is above 18K . The metal is simply too soft; as the gold bends over time, the prongs will loosen, and your expensive diamonds will not survive long-term wear.

To make gold durable enough for fine, everyday jewelry, we must mix it with other, stronger metals—a specific recipe that jewelers refer to as the Ligura.

This mixing process (the *Ligura*) is what gives gold its necessary structural strength, but it is also exactly how we create different colors.

• Rose Gold To achieve a warm, pinkish-red hue, we add copper to the pure gold mixture.
• White Gold To create icy white gold, we mix the pure yellow gold with white metals such as silver and palladium. In the past, many manufacturers used nickel to whiten gold, but because nickel is highly allergenic, many countries now restrict its use. Premium jewelers today strictly avoid it to ensure your jewelry remains hypoallergenic.

Because of this essential blending process, the definition of "real gold" changes depending on where you are in the world. For fine jewelry, the gold content generally ranges anywhere from 9K to 22K.

• In the United States, the legal minimum for a piece to be classified as gold is 10K.
• In parts of Europe, 9K is widely accepted and utilized for standard gold jewelry.
• However, across Asia—and very commonly here in Singapore—there is a deep cultural preference for 21K and 22K gold.

You will often recognize 21K gold by its very distinct, bright, and almost fluorescent yellow appearance. However, because this high-karat gold is so close to pure gold, it remains very soft. To prevent these traditional pieces from completely crushing or bending, they are typically designed to be very thick and heavy, making them entirely unsuitable for delicate, modern diamond settings.