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2. Touchstone (assaying tool) - Wikipedia

   en.wikipedia.org/wiki/Touchstone_(assaying_tool)

   This method has been used since ancient times. In modern times, additional tests can be done. The trace will react in different ways to specific concentrations of nitric acid or aqua regia, thereby identifying the quality of the gold: 24 karat gold is not affected but 14 karat gold will show chemical activity.

3. Karatmeter - Wikipedia

   en.wikipedia.org/wiki/Karatmeter

   It also accurately (up to 10-12 microns) determines the element composition of all types of gold, white gold, platinum, silver, palladium, rhodium and related alloys. Energy dispersive X-Ray fluorescence (ED-XRF) is a simple, accurate and economic analytical methods for the determination of the chemical composition of many types of materials.

4. Acid test - Wikipedia

   en.wikipedia.org/wiki/Acid_test

   An acid test is a qualitative chemical or metallurgical assay utilizing acid. Historically, it often involved the use of a robust acid to distinguish gold from base metals . Figuratively, the term represents any definitive test for attributes, such as gauging a person's character or evaluating a product's performance.

5. Metallurgical assay - Wikipedia

   en.wikipedia.org/wiki/Metallurgical_assay

   A model of a late 19th-century Canadian seal used to certify the quality of assayed gold. A metallurgical assay is a compositional analysis of an ore, metal, or alloy, usually performed in order to test for purity or quality. Some assay methods are suitable for raw materials; others are more appropriate for finished goods.

6. What Is the Cheapest Way To Buy Gold?

   www.aol.com/cheapest-way-buy-gold-220035011.html

   Find the Best Dealer. Gold dealers come in all shapes and sizes. You can purchase from any of the following: Online Dealers. Perhaps the cheapest and easiest place to buy gold is from an online ...

7. $83 Billion Gold Deposit Unearthed In China – Is This The ...

   www.aol.com/83-billion-gold-deposit-unearthed...

   Over the last five years, the price of gold has increased by approximately 83% — Investors like Bill O’Reilly and Rudy Giuliani are using this platform to create customized gold IRAs to help ...