Quick answer

Hermès bags with palladium hardware use palladium-plated brass. The plating reads as a cool white-silver with a gray cast next to chrome. Many replicas use nickel, chrome, or a steel base. A magnet, a 10x loupe, and 12 months of wear separate most of them. Hermès does not publish plating thickness or the base alloy.

What palladium hardware is

Palladium is a platinum-group metal. Its density is 12.02 g/cm³. Hermès lists palladium-plated hardware as an option on the Birkin, Kelly, Constance, and Evelyne. The hardware is not solid palladium. It is a thin electroplated layer over brass, a copper-zinc alloy. Decorative plating in jewelry and hardware runs 0.5 to 5 microns.

Color checks

Palladium has a white-silver tone with a faint gray cast. Chrome is brighter and bluer. Nickel shows a yellow shift under warm light. Rhodium sits between palladium and chrome. Compare a candidate bag with a known palladium item under three light sources: daylight at 5500K, warm indoor light at 2700K, and a phone flash.

Stamp and engraving checks

Hermès hardware carries the HERMÈS name on the turn-lock. Some models also carry stamps on the studs and the feet. Real engraving is cut into the metal. The floor of the cut is matte. The edges are sharp. Laser etching sits on the surface and reflects light in a flat way. Use a 10x loupe. Look at the accent over the E. Many fakes lose the accent or cut it shallow. Check the gap between each letter at the same scale as a reference photo.

Magnet and weight checks

Brass is not magnetic. Palladium is not magnetic. A rare-earth magnet will not stick to real hardware. It will stick to a steel base. Zinc alloy also fails the magnet test, so a negative result proves little on its own. Skip the weight test. A plating layer under 5 microns adds no measurable mass.

Wear over 12 months

Palladium resists tarnish and skin oils. After a year of daily use, real plating shows light surface scratches and no color shift. Nickel plating turns dull yellow at high-contact points, such as the turn-lock and the handle rings. Chrome plating chips at the edges, because chrome is hard and brittle. Wipe the hardware with a dry microfiber cloth and photograph it at the same angle each month.

Allergy check

Nickel is the most common metal contact allergen. The Agency for Toxic Substances and Disease Registry puts nickel sensitivity at 10 to 20 percent of the population. Palladium has a low sensitization rate. A rash on the wrist after a week of contact points to nickel, not palladium.

Photo checks fail

Resolution, white balance, and compression hide plating color. Authentication labs use a microscope at 20x to 200x plus a metal assay. An X-ray fluorescence (XRF) gun is the sole method that reads the alloy without cutting the metal. Many US jewelers own one and can test a bag in seconds.

Legal note

Selling counterfeit goods is a federal crime in the US under 18 U.S.C. section 2320. A first offense carries up to 10 years in prison and a $2,000,000 fine for an individual. U.S. Customs and Border Protection seizes counterfeit shipments at ports. A fake bag bought for personal use can be seized at the border.