Short answer
White gold in a genuine Rolex is an 18 karat gold alloy, 750 parts gold per 1000. Replica watches sold as "white gold" almost never contain gold. Most use 316L or 904L stainless steel with a rhodium or PVD coating that copies the color. A smaller number use a gold plated layer or a tungsten core to add weight. The color can match. The density does not.
replica rolex white gold watch
What white gold is
Pure gold is 24 karat and too soft for a watch case. Watchmakers mix it with other metals. The 18k mix used for cases holds 75% gold by weight. The other 25% sets the color and the hardness. Palladium and silver push the alloy toward white. Nickel does the same at lower cost. Copper adds warmth and resists scratching.
Rolex White Gold Replica Comparison: Real vs Replica Guide
The raw alloy still carries a faint yellow or gray cast. To reach a bright white surface, the finished part gets rhodium plating. Rhodium is a platinum group metal. It is white, hard, and tarnish resistant. The plating layer is thin, measured in microns.
replica rolex white gold watch
What Rolex does
Rolex runs its own foundry and casts its gold alloys in house. The company states that its 18k white gold parts are rhodium finished. Genuine white gold Rolex models include the Day-Date, Datejust, Daytona, Submariner, GMT-Master II, Yacht-Master, and Sky-Dweller.
Case weight tells the story. A solid 18k gold case and bracelet runs 150 g to 250 g. Gold content in that mass is 75%. Fine gold alone in a 200 g watch is 150 g.
What replica white gold is made of
- 316L steel with rhodium plating. The most common build. Color reads close to white gold in daylight.
- 904L steel with rhodium or PVD plating. 904L is a harder alloy. Rolex uses it under the name Oystersteel.
- Gold plating over steel, in layers of 3 to 10 microns. It wears through at lug edges and clasp corners.
- Tungsten alloy cores with gold plating. Tungsten density sits near 17 to 19 g/cm3, so the heft feels close to gold. The metal is gray, not white gold.
Density numbers
Pure gold: 19.32 g/cm3. 18k white gold: 15.5 to 16.5 g/cm3. 316L steel: about 7.98 g/cm3. Tungsten heavy alloy: 17 to 19 g/cm3. These gaps are large enough to measure at home with a scale and a cup of water.
Tests that separate the two
A magnet is not a useful test. Austenitic stainless steels such as 316L and 904L are non magnetic or near non magnetic in annealed form. Gold is non magnetic too. Useful checks:
- X-ray fluorescence (XRF). A handheld unit reads the surface alloy in seconds and reports gold content. Plating depth confuses the reading, so a plated steel watch returns a thin gold signal.
- Density. Weigh the watch dry, weigh it submerged, and divide. Solid 18k white gold returns 15.5 to 16.5 g/cm3. Plated steel returns about 8.
- Hallmarks. Genuine 18k parts carry a 750 stamp plus Swiss hallmarks. A stamp alone proves nothing. Marking non gold metal with a gold content stamp misrepresents the material and violates the US National Gold and Silver Stamping Act.
- Wear pattern. Rhodium plating on steel shows gray base metal at sharp edges after months of contact. Solid gold shows the same gold color through the full thickness.
Cost and limits
Gold spot price moves. The fine gold in a 150 g 18k case is worth several thousand US dollars before labor at any recent price. A replica that sells for a few hundred dollars cannot hold that gold. Sellers who claim "solid 18k white gold" at that price are describing plating.
Rolex is a trademark of Rolex SA. Replica watches are not made by Rolex and are not sold by Rolex dealers.