If you stamp the new item, it must be accurate to within 1/10 of a karat, and it must include your trademark. Cast jewelry made prior to the 1981 stamping act was almost always 13.5 karat, and re-using that metal today will result in underkarated goods. The only method, to be safe, is to not stamp these items at all.
You are correct. No stamps at all and you’re fine.
David Geller
David Geller
JewelerProfit
510 Sutters Point
Sandy Springs, GA. 30328
(404) 255-9565
www.JewelerProfit.com
Wayne Emery and To Orchidians
I saw your picture in the Bench Magazines and you look knowledgeable
in your field.
Long time ago before I came in America 1971 and my Father came in
1969, we buy gold in the Phillipines.At early age, I learned to
determined the karat of the gold and to alloyed white and yellow
gold.To determinrd the karat you need a black stone and nitric
acid.Rubbed the metal [be sure to file first maybe its gold filled
]straigth one inch long. Put nitric acid in the middle for 5 seconds
ringed with water. If you see that there is no discoloration or no
changed that metal is 14k and above.If there is a changed,that is
13k and below You can tell if is 13k,12k.11k.and 10k by the fading of
the lines. You can tell it by experienced or by rubbing master 10k
gold and compare.To determined betwen 14k, 18k and above,rubbed the
14k and above put the acid and put cigarette ashes to the acid wait 5
seconds and ringed.If there is no changed that metal is 18k and
above and if completely disappeared it’s 14k.You can tell if is
17k,16 and 15k by the fading of the lines. That’s all for now.
Renato L. Ronquillo CMBJ
www.rlrdesigns.com
Lee,
I respectfully disagree with you.I know one method to determine the gold content of the gold. I do not know about 1/10 karat and the Law but I know that the 1/10 karat of 14k is 12.6k and the Law states that you cannot stamp it 14k if it is lower than 13.5k. The way to determine karat of the gold is the nitric acid test.
For this test, you need nitric acid, black stone andcigarette ashes,
the ancient filipino secret. First, file a small place on the metal
to be sure is not gold filled. Next, rub the metal on the black stone
then drop nitric acid in the middle wait 5 seconds and rinse with
water. If the line disappearsit is not gold. If the line fades a
little it is 13.5k and lower. If the line appears unchanged by the
acid,it is 14k and higher.
Assuming you have the 14k and higher metal, again do the acid test
as explained above. This time before rinsing the stone, add a pinch
of cigarette ashes and wait 5 seconds. Rinse with water. If the line
completely disappears you have exactly14k gold. If the line fades a
little, it is 17.5k and lower. If the line apprears unchanged,it is
18k and higher. If you have any question pleased free to call me.
Renato L. Ronquillo CMBJ
281-421-5603
www.rlrdesigns.com
1/10 karat and the Law but I know that the 1/10 karat of 14k is 12.6k and the Law states that you cannot stamp it 14k if it is lower than 13.5k.
Maybe somebody already addressed this, but this is faulty math. It is
not 10% of 14kt. (1/10th) it is that is needs to be 13.9 kt. at
least. The 13.5 kt. thing has been gone for 30 years or so now.
Just to clarify this misunderstanding, the law here in the U.S. is
1/10 karat, or it must be no lower than 13.9 karat. Once again I
don’t believe acid-etch tests will compare that tight of a tolerance.
Jon Michael Fuja
Just to clarify this misunderstanding, the law here in the U.S. is 1/10 karat, or it must be no lower than 13.9 karat. Once again I don't believe acid-etch tests will compare that tight of a tolerance.
Now that I know the law here in the U.S. is 1/10 karat. or it must
be no lower than 13.9 karat. I believe acid-etch tests with these
tolerance I can determine the quality of gold.
10 karat 9.9 karat - 10.8 karat
14 karat 13.9 karat - 14.8 karat
18 karat 17.9 karat - 18.8 karat
Respectfully Yours
Renato L. Ronquillo
www.rlrdesigns.com