The 375 stamp is straightforward once you know the system. It means 9 karat gold — 37.5% pure gold in a durable alloy used widely across the UK, Australia, and Commonwealth countries.
It's real gold. It has real value. And for buyers who want solid gold jewelry at a lower price point, 9K is a completely legitimate choice. The trade-off is less richness in color compared to 14K or 18K, and potential sensitivity for those with nickel allergies.
If you're evaluating a piece stamped 375, you can be confident it's not plated or fake — it's a solid gold alloy that will last decades with normal care. Just compare it honestly against 585 (14K) and 750 (18K) if you're considering an upgrade in purity.
Shop AJLuxe: All our pieces are crafted from 925 sterling silver with 18K gold plating — the combination stamped 925 + 18K or 750 on genuine pieces. Browse initial necklaces →
Written by Vaishakhi Ajmera, founder of AJLuxe. Last updated: June 2026.
The piece they're describing → Heart Initial Necklace for Women — 18K Gold Plated, Personalized Letter + Heart Pendant
