The methods for identifying the authenticity of platinum rings include: color observation method, hand weighing method, marking method, gas spontaneous combustion method, and spot test method.
1. Color observation method
Platinum is abbreviated as "platinum", and there is another type of white K gold commonly referred to as "platinum", but the price of this white K gold is much lower than platinum, so special attention should be paid when purchasing. Upon careful observation, it can be distinguished by its color. Pure platinum is white with a brilliant luster, while the color of white gold is white with a hint of beige, and the color of silver is pure white.
2. Hand weighing method
Platinum has a high density of up to 21.45, so when weighing materials of the same volume, platinum feels heavy. It is heavier than gold (19.36), K platinum, and silver (10.45). You can carefully weigh it when making a purchase.
3. Marking method
According to international regulations, precious metal jewelry is required to have a unique metal mark printed on it, such as s925 and 925 for silver, 999 for gold, etc. The mark for platinum jewelry is pt. After purchasing, you can check the type of markings engraved inside the ring of the diamond ring.
4. Gas spontaneous combustion method
Place the jewelry on the twisted open gas stove and let it sit for a few minutes. If the ring turns red and the gas stove is heated, it will be a platinum product. This is because platinum can act as a catalyst, promoting the oxidation reaction between gas and air to release heat, causing platinum to heat up, turn red, and ignite gas. This method is dangerous and not recommended to try.
5. Point and try method
The first step is to apply mercury to the ring. Genuine platinum will not be contaminated, while gold, silver, etc. will react with mercury and become contaminated.
Next, use a file to file some powder at the edge or center of the platinum ring and place it in a hydrogen peroxide bottle. True platinum can act as a catalyst to promote the decomposition of hydrogen peroxide, releasing oxygen and causing it to churn up and down. But doing so can also cause some damage to the jewelry.