The density of platinum is 14.64 g/cm3.

The density of platinum is 21.45g/cm3.

The density of silver is10.50g/cm3.

First, check the tag.

According to the national standard, precious metal ornaments should be marked with the origin, manufacturer, material and content, and products without marks are unqualified products. If there is a quality problem, the quality inspection agency can give detection and judgment according to the imprint. Consumers should buy their own brands and gold ornaments with different gold contents according to the imprint.

Second, the sensory test method:

Look at the color: pure gold is dark yellow, k gold is yellow, red, white and other colors, while imitation gold products are mostly copper alloys with lighter colors. Weight: The specific gravity of gold is 19.3g/cm3, which is much higher than that of imitation gold products. For example, a gold ring is about 5g, while imitation gold products of the same size generally weigh less than 3g. Hardness test: Pure gold is soft, which can be scratched with a pin, and there are teeth marks with teeth.

Extended data:

Identification of platinum:

The most common white metals on the market are platinum and platinum, which are easily confused because of their white appearance, but they are actually two completely different metals. The white color of platinum (commonly known as platinum) is not naturally formed. It is actually an alloy, consisting of 75% gold and other metals, with a white surface. So platinum will fade and yellow when worn for a long time.

The most direct way to identify platinum is to find the unique symbol of platinum in jewelry-Pt or platinum. According to the national regulations, the back of each platinum jewelry must be engraved with the exclusive logo of platinum: Pt or Platinum (Platinum). After the logo, the purity of platinum, that is, the percentage of platinum content, such as Platinum (Platinum) or Pt950, Pt990 and Pt999, the latter two are commonly known as all platinum and thousands of gold.

References:

Baidu Encyclopedia-Platinum

References:

Baidu encyclopedia-gold