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What is semi-precious stone?

Some jewelry fans leave a message in the background: I saw people say that semi-precious stones are not valuable, and others say that semi-precious stones are not gemstones, what is semi-precious stone in the end?

Which gemstones are easily corroded by sweat!

In the summer, some jewelry becomes foggy and loses its luster.
In fact, this is the “durability” of gemstones in the blame. Today we will talk about encounter sweat easy to corrode jewelry.

Is it beneficial to have oil in emeralds?

In the gem circle, there is a beautiful gemstone with a very high “oil content”. If you don’t pay attention, you will be disliked by people who don’t understand it, which really makes it a little aggrieved, it is the emerald with oil.