Listen with ears.
See color. The higher of the fineness of gold, the more golden brown color it is.
Check the soft and hard. Soft gold jewelry, the higher the purity, and the softer it is. And it’s easily flexible. But rare gold, copper and other metal products has greater hardness.
Listen to the sound. When gold jewelry dropped on the ground, there is no sound.
With fire. Gold jewelry will not be used to change the color of fire, and other metal oxide will turn into dark after fired.
Diamond taste.
Oil test: Use a special oil-based ink ballpoint pen to draw a line in the diamond table, a continuous line will be left behind. While others are intermittent imitation of points and lines.
Drop test: The water in maintaining the ball diamonds will be a long time, and the imitation will be on the water droplets in a relatively short period of time to disperse.
Tone test: Take a tone on the diamond, if the diamonds’ aqueous vapor disappear, it is true; if the water stayed in the diamond and disappeared for a few seconds, it is fake diamonds.
Feeling test: The temperature of diamonds at room is much cooler than fake ones.
