Platinum Question

[DiaLil]

I am considering a platinum mounting to put my marquise in. It is from Jared''s and is stamped Plat. There is not a 950 before or after Plat.

Should I be concerned this is not fully platinum.

Thank you for your help.

 

[FireGoddess]

Plat, Plat 950, 950, and PT950 usually denote 95% platinum, but if you want to be extra sure, give them a call...

 

[sunkist]

Has anyone heard of using 100% Platinum in a ring, instead of 95%? I saw a men''s ring yesterday and they guy told me it was 100% and told me how ''wonderful'' it was.

 

[JohnQuixote]

Date: 5/9/2006 3:00:55 PM
Author: sunkist
Has anyone heard of using 100% Platinum in a ring, instead of 95%? I saw a men''s ring yesterday and they guy told me it was 100% and told me how ''wonderful'' it was.

That''s unusual. You could probably make a special request to have a 100% platinum piece cast, but it would be considered impractical/too soft in the industry. If the stamp says 100% platinum it may have been done that way...(?)

It''s possible he meant that the ring was made entirely from the platinum family of metals: Platinum is commonly alloyed with iridium or ruthenium, which are in the same family. The others: Palladium, used mostly for gold alloys to produce white gold. Rhodium, used as a plating finish for jewelry and silverware, and osmium, as dense as iridium but not associated with fine jewelry as it oxidizes easily.

 

[JohnQuixote]

Date: 5/9/2006 2:48:46 PM
Author: FireGoddess
Plat, Plat 950, 950, and PT950 usually denote 95% platinum, but if you want to be extra sure, give them a call...

FG is right. 950 can be marked "Platinum" without the use of any qualifying statements. Requirements have changed over time. Some early pieces marked "Plat" or "Platinum" might fail modern standards - a FYI for estate sale shoppers.

Federal Trade Commission information.

 

[WestsideLisa]

Mark Morrell has some interesting information about Platinum on his site. He uses Platinum 900.

http://www.mwmjewelry.com/platinum_purity.htm

 

[sasquatch]

Date: 5/9/2006 3:00:55 PM
Author: sunkist
Has anyone heard of using 100% Platinum in a ring, instead of 95%? I saw a men''s ring yesterday and they guy told me it was 100% and told me how ''wonderful'' it was.

I don''t think there is such thing as 100%. I''ve seen gold/silver/platinum bars marked with 999.9 or something like that. My everyday wedding band is 999.5 platinum. For special occasions, I wear my 24K wedding band.

 

[Gypsy]

Date: 5/9/2006 4:39:49 PM
Author: WestsideLisa
Mark Morrell has some interesting information about Platinum on his site. He uses Platinum 900.

http://www.mwmjewelry.com/platinum_purity.htm

Anyone know which of these 950''s Quest uses? I''m going to have to ask Peter. Poor Man. I''m so nervous about this custom setting.