Browse terminology related to jewelry materials, manufacturing, sourcing, and more.
A statistical sampling standard (ISO 2859-1) defining maximum defective units allowed — the global benchmark for jewelry quality inspection.
An official stamp on precious metal jewelry indicating metal purity, maker identity, and (in regulated markets) the assay office that verified it.
The amount of nickel leaching from jewelry into skin — regulated by EU REACH (EN 1811) at max 0.5 μg/cm²/week to prevent allergic dermatitis.
X-Ray Fluorescence — a non-destructive method to verify precious metal purity in seconds without damaging the jewelry piece.