It's full of mechanical sense, it seems to have a sense of hierarchy, The pits above are the contact surface of the rock when growing. don't miss them!

Our Mineral crystal Shop at Shantou,Guangdong,China
We can offer all kinds of chinese mineral crystals by wholesale or by retail.You are welcome to contact us in free time!
When in China, please come by for a visit. I would be very happy to meet with you!