Pewter
At least 900 parts per thousand Grade A Tin.
| Property | Value | Authority |
|---|---|---|
| Fineness | 900 parts per 1,000 [1] | § 23.9(b) |
| US legal requirement | May be described or marked "Pewter" only if it consists of at least 900 parts per 1,000 Grade A Tin, the remainder being metals appropriate for use in pewter. [1] | § 23.9(b) |
| Tarnishes | Yes [1] | § 23.9 |
Sources
- 16 CFR Part 23 — Guides for the Jewelry, Precious Metals, and Pewter Industries — U.S. Government Publishing Office (16 CFR Part 23)