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0:11:40

Testing 1/2 oz Gold Krugerrand coin various ways including ultrasound thickness gauge

0:10:38

How to calculate the density of gold alloys or any metal alloy using a mathematical equation.

0:15:01

The Australian Gold Nugget Coin

0:13:36

Is this Canadian Maple Leaf gold coin real?

0:15:05

Ultrasound thickness gauge testing of platinum, silver, and other materials. (part 2) #ElpidanET400

0:14:05

Ultrasound thickness gauge testing of platinum, silver, and other materials.#ElpidanET400 (part 1)

0:14:53

Is my 50 pesos Centenario gold coin real? (Gold coin testing methods)