The Specific Gravity Test is used to calculate the gold content of gold nuggets that contain a mixture of gold and other materials. In this example of the specific gravity test, we use gold mixed with quartz. Nugget weighed in air weighs 96 grams Nugget suspended in water weighs 74.5 grams
See full list on gold nuggets
Specific gravity Test for Gold and Quartz Specimens: Figure out how much gold is in a quartz gold specimen. The simplest way to test specific gravity is weigh the quartz gold specimen in air and multiply the weight by 1.9. Then weigh the quartz gold specimen fully submerged in distilled water and multiply that weight by 3.1.
the most difficult thing with SG tests is the specific gravity of the host rock. For every 1% you get it wrong, you will be 1% less accurate. Quartz varies a lot in density from 2.6 3 and iron oxide varies even more, 3.3 4.5.
See more results
The default values below are for gold, using an average specific gravity of 18.6, and quartz, using a specific gravity of 2.65. These values assume a specimen of gold in a matrix such as quartz. However for a gold nugget, containing another mineral such as silver, use the
Tungstens specific gravity is 19.25 and 24k gold is 19.32. Given these two are so close together, if you are still second guessing and are buying large quantities of gold, you may want to consider the sigma metalytics precious metals tester which penetrates the item above the surface and tests the resistance of the metal.