The purity of platinum is the best representative of love, diamond is the best pledge partner. But how can we tell if a ring is made of platinum?

According to the regulations, the back or inner ring of each piece of platinum jewelry must be engraved with any one of the following proprietary logo - platinum, platinum, platinum or Pt, and in the logo must be followed by the following platinum purity, this line of small logo can give you platinum quality assurance.



The identification of platinum can also be instrumented:

Hardness test: platinum hardness is 4--4.5 degrees, harder than gold and silver, with a knife or glass scratch scratches, but not by nails;

Density measurement: the density of platinum is very large, hand weigh has a sinking feeling, with the hydrostatic method to test the density should be 21.43g/cm cubic;

Using fire: the melting point of platinum is as high as 1773 degrees, and the platinum is burned on an alcohol lamp or an electric stove, without changing its color;

Acid test: platinum chemical properties are stable, insoluble in common acids, the platinum on the touchstone, with hydrochloric acid drops, wear marks unchanged;

With hydrogen peroxide test: take a little platinum powder, placed in hydrogen peroxide level bottle, hydrogen peroxide immediately bubbles, after the reaction of the platinum without damage, can still be used.