How to tell the weight of a gold necklace

If you want know the weight of your gold necklace, it means that the weight of the actual content of pure gold contained in your necklace, so determining the weight of your gold necklace isn't as simple as putting the necklace on a scale and weighing it.
Sometimes you need a large of number, you will plan to sell your gold necklace, and so gold necklaces usually come in 10, 14, 18 or 22 karat gold.
The following of calculating the weight of gold in your necklace:
The first:
You search the gold content stamp on the necklace and then you can use a magnifying glass to observe it. It's usually stamped on the clasp. Then you will look at a number and a large "K," it stands for "karats." Because there are several numbers about the gold, you can search it is a 10, or 14, or 18 or 22 "K" stamp.
The second: If you didn’t look for the number, you can remove anything from the necklace that isn't gold, such as pearl, coral, or gemstone.
The third: In your home if you have postage scale, then you can lay the gold necklace on it, it is correct to weight it on the postage scale, and then take note of the weight of the necklace in ounces.
The last: If your fashion gold necklace is "10K," multiply the ounce: .417; "14K," multiply: .585; "18K," multiply: .750; "22K," multiply: .916. The result of calculation is the weight of pure gold in the necklace.