The Gold Color Chart Daumet could produce with its innovative gold alloys

Pure Color. Optimized Mass.

Daumet's patented gold-tungsten alloys deliver certified 18K and 22K gold finishes with the color, density, and luster of solid gold—using 70-90% less material.
Two proprietary formulations engineered for jewelry: Fine White™ (18K rhodium-free white gold) and High-Density 22K (for markets demanding maximum radiance).
And even any composition from 18K to 24K gold alloys.

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Why Gold-Tungsten Alloys?

Pure gold is soft, heavy, and expensive. Traditional jewelry alloys (copper, silver, palladium, nickel) compromise color, durability, or biocompatibility.
Daumet's gold-tungsten matrix solves this trilemma:
- Maintains 18K/22K gold color and luster
- Enhances hardness 2-10× over pure gold
- Reduces material consumption by 70-90%
- Hypoallergenic (no nickel, no cadmium)
Applied via PVD (Physical Vapor Deposition) for atomic-level adhesion—impossible with electroplating or traditional alloying.

Two Certified Alloys

18K FINE WHITE™
The first certified 18K white gold coating without rhodium. Naturally white, permanently brilliant, hypoallergenic.

HIGH-DENSITY 22K
Certified 22K gold finish (916/1000) with the "massiveness" and radiance expected in Indian, Middle Eastern, and Asian traditional jewelry—enhanced durability for daily wear.

More technical informations on demand.

21K Champagne Gold coating on Ring by Sandrine Tessier

Bespoke Alloys: Your Signature Gold

Beyond Fine White™ and 22K High-Density, Daumet engineers custom gold-tungsten alloys in any color and karat—from subtle white variations to rare champagne tones.
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Create a signature gold hue no competitor can replicate.
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Implement your patented and exclusive composition and own your material differentiation.

This ring has been coated with a dedicated 21K Champagne Gold to solve an allergy problem.

More information on demand.

Process: PVD Gold Vapor Technology

Physical Vapor Deposition (PVD) applies gold at atomic level—creating denser thin film than electroplating.
Atomic Adhesion
Gold atoms bond directly to substrate surface. Result: no peeling, no delamination, no cracking even under flex.
Controlled Composition
Precise gold-tungsten ratio ensures certified 18K/22K gold content while enhancing mechanical properties.
Thickness Control
Deposition from 0.5 to 5µm depending on application— thinner than electroplating (10-20µm) with superior performance.