Test Gold by Density Test

There are very few metals denser than gold. The density of pure 24K gold is about 19.3 g/ml, which is much higher than most other metals. Measuring the density of your items can help you determine if your gold is real. As a rule of thumb, the higher the density, the purer the gold. Make sure to perform the density test on gold that has no gemstones of any kind attached. See the warnings below for important information about the density test.

1.Weigh your piece of gold. A jeweler can normally do this for you for free if you don’t have your own scale. You will need the weight in grams.

2.Fill a vial with water.It’s helpful if the vial has millimeter markings on the side, since that will make it easier for you to read the measurements for this test.

It doesn’t matter how much water you use as long as you don’t fill the vial to the top, since the water level will rise once you immerse the gold in it.
It’s also important to note the exact amount of the water level before and after immersion.

3.Place your gold in the vial. Take note of the new water level and calculate the difference between those two numbers in milliliters.
4Use the following formula to calculate density: Density = mass/volume displacement. A result close to 19 g/ml indicates either real gold, or a material with a density similar to gold. Here is an example calculation:
Your gold item weighs 38 g and it displaces 2 milliliters of water. Using the formula of [mass (38 g)]/[volume displacement (2 ml)], your result would be 19 g/ml, which is very close to the density of gold.Bear in mind that different gold purity will have a different g/ml ratio:
14K – 12.9 to 14.6 g/ml
18K yellow – 15.2 to 15.9 g/ml
18K white – 14.7 to 16.9 g/ml
22K – 17.7 to 17.8 g/ml

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