When shoppers ask why a mass-market gold-plated necklace turns brassy or leaves a green ring on the skin within a month, the answer comes down to three measurable engineering numbers: gold thickness in microns (µm), the barrier metal underneath the gold, and whether the surface is sealed.
1. The Micron Math: 2.5 µm vs. 0.15 µm Flash Wash
One micron is one-millionth of a meter. Most fashion and mall-kiosk jewelry uses "flash plating" (0.15 to 0.25 microns of gold)—a layer so microscopic that everyday friction against a cotton collar rubs through it in weeks. At Vellamere & Co. in Salado, Texas, every $68 necklace is electroplated to a full 2.5 microns of heavy 14k yellow gold—matching the U.S. FTC micron threshold for heavy gold vermeil and delivering 5 to 10 times more gold than standard plated jewelry.
2. Why We Use a 0.025 µm Pure Palladium Barrier Instead of Nickel
Green skin and contact dermatitis rarely come from gold itself; they come from cheap nickel underplating or raw copper/sterling diffusion migrating upward through microscopic pores in the gold. Before a single atom of 14k gold is applied at our Salado bench, we plate a 0.025-micron barrier of pure Palladium—a noble platinum-group metal with 0.0% nickel that locks out base-metal migration and keeps sensitive skin comfortable.
3. Stage 4: Baked-On Porceshield™ Ceramic Armor
Even thick 2.5-micron gold is naturally soft. To protect the mirror finish from daily wear, sweat, and lotion, we seal every pendant and chain in our electrostatically charged, oven-cured Porceshield™ clear ceramic coating, adding 5 to 10 years of everyday wear and backed by our Free Lifetime Replacement Guarantee.
| Layer | Vellamere 4-Layer Salado Spec ($68) | Standard Department-Store Plated |
|---|---|---|
| Core Gauge | 1.3 mm (16-gauge) Bronze • 8-Hr Ceramic Rotary Tumbled | 0.5–0.7 mm Stamped Sheet |
| Barrier Layer | 0.025 µm Pure Palladium (0.0% Nickel) | Nickel Flash Underplate |
| Gold Layer | 2.5 µm Heavy 14k Yellow Gold | 0.15–0.25 µm Flash Gold |
| Protective Seal | Porceshield™ Baked Ceramic Topcoat | Unsealed or Cold Lacquer |
See the full cut-open cross section on our 4-Layer Metallurgy & Cutaway Page →