You can tell if you have a real gold necklace by checking its hardness, luster, specific gravity, streak, cleavage, and fracture, if all the properties match with the properties of gold you have a gold necklace.
there are various way on how to check if you have real gold.
please see the article that i made to check real gold at home.
authenticgoldbykj/how-to-test-gold-authenticity-at-home/
We tell real gold by its weight.
It means it is a 14k gold necklace.
You can tell if a ring is real gold or not by putting it near a magnet. If the ring is attracted to the magnet it is not real gold, real gold is not magnetic at all.
no
it means gold plated
it means karot9 as in 24 karot gold
It means it is 14 k gold.
The hallmark 925 designates 92.5% silver in the total metal, not the gold. And worth can be determined upon the weight of the 925 silver neckless.
no
925 gold neckless how much is it worth
by pooing on it
Fake gold, or "fools gold" has a foul sulfur odor while real gold does not. Usually, you can rub the gold and sniff it to determine if it is real or fake.