16ct or 700?

[gimmiethegold]

Hey guys I saw a ring today that was 700 or what the seller claimed was 14ct and I didn't say anything about the mark at the time. Does this exist? I couldn't find much information about it online however what I could find on ebay was online new products that were 16 ct and they were watched that were rose gold which looks very similar to this ring.

 

[House]

14 karat is a popular choice for wedding bands but it is also known as 585 gold as it is 58.5% gold.

700 would mean it's 16.8 karat.

So methinks the seller has one the numbers wrong or is a bit dodgy. Does it have a stamp?

 

[gimmiethegold]

Yes the stamp says 700. It is kind of rosey. Looks very real and heavy, completely solid. How accurate are tests other than acid?

Thanks mate.

 

[wrcmad]

You can get a close estimate using an SG test.
If it is red then assume copper, and use a table like this http://www.hauserandmiller.com/reference/melting.html
Or a calc like this http://tmtpages.com/specific-gravity.htm

I recently used this method to estimate content of an article before purchase - concluded 18k (75%) using SG test. Then took the punt and had item XRF'd after purchase - showed 78% Au.

 

[ShinyStuff]

Sg test is a great idea but wont work if ring is set with stones.

Shiny

 

[gazzahere]

I find acid ok - but not deadly accurate - I use it as a guide. I am sure very experienced people would do better.

xrf - bullet proof as long as you get to the metal ----------- thick coating or rolled gold is a problem if you cannot file.

SG is good for small items -------- I found with large bits ------------ I did an sg recently on a nugget that was just under 10 oz - I thought it would easy - but it was very difficult - using the water was ok, but getting the right sized container and the right set of scales proved problematic.

Not a piece like that - but other stuff I just melt, stir then xrf - of course you can't do that with jewellery --------- but a heft test tells you most of it I find.

I haven't used a pen, but intend to get one in the future, I have heard good reports.

have a great arvo

gazza