FYI - Gold (as in use in jewelry)

[CASPER-2]

https://www.gold.org/about-gold/about-gold-jewellery

Ive have found over 1000 pieces of gold jewelry since 1975 (age 12) in this hobby
I have found most of it as a water hunter over the last 20+ yrs
So learned early on "what's what" but know many others may not
mostly because they just haven't found a lot of it yet - hopefully this site will help you

 

[CASPER-2]

...and just to show you about "old dogs..new tricks"
I was told for years when i was younger that white gold was mostly made with nickle added to give its silvery finish
old timers that told me that - were wrong

 

[CASPER-2]

many sites out there - here is another - some might find interesting
Heck you might just be bored
https://owlcation.com/misc/Understanding-Gold-Purity

 

[hill_billiez]

Excellent article. Hopefully it will clear up confusion on those markings. Maybe some newbie will not get juked in a future deal. I have learned some the hard way. Live and learn. Thanks for posting.