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APPENDIX II
REQUIREMENTS FOR STAMPING / printable
version
(Updated 21 February 2003)
All jewelry items will be stamped with the following information
per the requirements established by the National Gold & Silver
Stamping Act 15 U.S.C., sections 291 through 300 and the Federal
Trades Commission's Guides for the Jewelry, Precious Metals and Pewter
Industries 16 C.F.R. Part 23.
1. Hallmarks:
- Platinum will be stamped PLAT / PT950 / PT900.
- Karat gold will be stamped with one of the following:
| 10 karat gold |
|
10k or 10kt |
|
417 |
| 14 karat gold |
|
14k or 14kt |
|
585 |
| 18 karat gold |
|
18k or 18kt |
|
750 |
| Baht gold |
|
22k or 22kt |
|
900-950 |
2. Supplier's Trademark:
Stamping of the trademark will be placed as closely to the hallmark
as possible and will be approximately equal in size. Locations of
stamping are as follows:
- Rings: Stamping placement inside shoulder of the shank as to not
affect the resizing capabilities.
- Earrings: Each earring post requires both the hallmark and
trademark of the supplier. It is sufficient for the earring backs
to be stamped with the correct hallmark and finding companies
trademark.
- Pendants require the placement of the hallmark and trademark on
the back of the bale or inside the rear of the mounting.
- Chains: The supplier's trademark and hallmark can be stamped on
the clasp tongue, jump ring or metal plate connecting the clasp.
- Bracelets are to be stamped on the clasp junction, tongue, or
safety latch.
3. Diamond Stamping:
All merchandise will be stamped inside the shank using the
following examples:
- If the item has a center diamond, the minimal acceptable weight
of that stone will be stamped. For example, a 1/4 carat should be
stamped 0.25ct. If a contract range is established for a minimum
then the minimum range should be used. For example, 0.23-0.27
carat is acceptable then 0.23ct should be stamped.
- If there is no main diamond then the item with a one carat total
weight will be stamped 20/1.00TW unless a range is established by
the contracting officer. in which case the minimum required weight
should be stamped. For example, a range of 0.956-1.10TW. is
acceptable for a one carat total weight, the stamping should then
be 20/.956TW.
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