Specific Gravity Gold Test

By: Chad Castellanos

Have you ever wondered how you can tell if the gold jewelry or coins you own are real? In my new gold book – How To Buy Gold For Profit Without Money or Experience I go over several methods of verifying the purity which can save you a lot of time and money if you make a career flipping gold.

This article is going to focus on specific gravity of gold calculation which is one of many ways of verifying the gold content of your item. Specific gravity is a ratio of the density of a substance relative to the density of a reference substance.

Most specific gravity testers cost over $2,000 and to be honest, they aren’t worth the cash. The reason why I would never fork over $2,000 again for one of these testers is because all you really pay for is a simple division problem. If you can do elementary math, then you can save yourself a couple grand. 

Over the past several months, I have been working tirelessly to figure out a simple specific gravity tester that is affordable and portable.  I have designed this with affordability in mind where you can buy one for 90% cheaper than the normal price of an SG tester. 

You can buy your own Specific Gravity Tester for 90% off here:

The Method

To measure the gold purity using this method, we are going to use a calculation of our gold item submerged in water.

Here’s what you will need.

  1. Glass or plastic see through container that is big enough to fully submerge your item in water without touching any of the sides or bottom.
  2. Pure filtered water – enough to fill your container to fully submerge your item.
  3. Jewelry scale
  4. Stand or mini tripod – if you don’t have you can use a small piece of wood and a stack of books
  5. Dental floss or thin string

Step 1. Weigh your item on the scale.

Step 2. Put cup of water on the scale and zero the scale

Step 3. Tie your string around your item

Step 4. Set your tripod or wood block over the cup and submerse the item in water without touching the sides or bottom.

Step 5. Get weight of the item on scale.

Step 6. Divide the original weight of your item by the weight of your item submerged in water.

Step 7. Match your calculation with the specific gravity to find out the metal purity.



That’s it. A pretty simple calculation can save you a tremendous amount of money and time testing gold.

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