If you’ve ever looked at the inside of an Azzallure signature ring, you’ve likely seen a tiny "750" stamp. In the world of high-end jewelry, especially in the gold hubs of Dubai and Mumbai this number is the international "shorthand" for luxury and durability.
But what does it actually mean for your jewelry’s lifespan, and why don’t we use "999" gold for diamond settings? Let’s break down the chemistry of 18K gold.
1. The Math of 750
The "750" stamp stands for 75% purity. In the karat system, 24K is 100% pure gold. However, pure gold is incredibly soft, roughly the consistency of a copper coin. If you set a diamond in 24K gold, the prongs would bend under the slightest pressure, and you’d lose your stone.
To fix this, we create an alloy: 18 parts gold and 6 parts other metals (like silver, copper, or palladium). This results in a metal that is 75.0% pure gold, hence the "750" hallmark. This balance is the "Goldilocks Zone" of jewelry: rich enough to hold its value, but strong enough to protect your investment.
2. Why "750" is Better for Diamonds than 22K
Many clients in India are used to 22K (916) gold for traditional jewelry. While 22K is beautiful, it is often too soft for the intricate "micro-pavé" or "hidden halo" designs popular in 2026.
When you are choosing between Emerald and Radiant cuts, the structural integrity of the metal is vital. 18K gold provides a more rigid "seat" for the diamond, ensuring that those sharp corners and delicate facets remain secure for decades.
3. The Color Palette: It’s All in the Alloy
One of the best parts of 750 gold is the variety of colors we can create by changing the other 25% of the mix:
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White Gold: Mixed with palladium or nickel and usually coated in Rhodium. If you're torn on the "look," check out our debate on White Gold vs. Platinum to see which fits your lifestyle.
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Rose Gold: Mixed with a higher percentage of copper for that vintage, warm glow.
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Yellow Gold: A classic mix of silver and copper to maintain that "royal" sun-kissed hue.
4. Buying in Dubai: The Hallmark of Trust
Dubai is known as the "City of Gold" for a reason. The government has strict regulations on hallmarking. When you buy from a reputable jeweler, that "750" stamp is a legal guarantee of purity. If you’re visiting the UAE, make sure to read our tourist's guide to jewelry shopping in Dubai to understand VAT refunds and how to verify hallmarks at the Gold Souk.
5. Maintenance: Keeping the Glow
Because 18K gold is 25% alloy, it requires slightly different care than 24K bullion. Over time, chemicals in perfumes or lotions can dull the finish. We recommend a gentle cleaning routine to keep your custom-designed pieces looking brand new. For a step-by-step, see our latest jewelry cleaning and maintenance hacks.