Our Metal Options
We offer four metals across yellow gold, white gold, rose gold, and platinum.
OUR STANDARDS
Metals
9 Karat Gold
Hallmark: 375 (37.5% pure gold)
The hardest of our gold alloys. More resistant to surface scratching. Well suited to everyday wear and active lifestyles.
14 Karat Gold
Hallmark: 585 (58.5% pure gold)
A well-established balance between purity, durability and colour. Harder than 18k, with strong performance across daily wear.
18 Karat Gold
Hallmark: 750 (75% pure gold)
The preferred standard for fine jewellery and engagement rings. Higher gold content and greater malleability means prongs flex rather than fracture: easier to service, and the metal degrades less over decades of wear.
Platinum
Hallmark: 950 (95% pure platinum)
The densest and most substantial metal we offer. Platinum is naturally white: its colour requires no surface treatment. It develops a soft patina over time, repolishable on request.
White gold and rhodium plating
All white gold pieces are rhodium plated to achieve their bright white finish. Over time, rhodium plating can wear. HEIREST can arrange re-plating at workshop cost — contact support@heirest.com.