Because it grows on the seabed, it may be invaded by other microorganisms, forming defects such as insect eyes, especially inverted corals (coral trees fall into seabed sediments alive). It is a natural growth characteristic of corals to say that natural corals have insect eyes. For every individual who makes fashionable and high-grade jewelry, not everyone should see wormholes because of the choice of processing, and it is normal to have them. As long as it is not in the obvious position and does not affect the appearance and wearing, there is no problem. Coral is really hard to pursue perfection (of course, the price will be more perfect) Therefore, it is normal for corals to have insect eyes, but stones with insect eyes are not necessarily natural corals. I hope I can help you.