perl

The structure of a pearl is composed of concentric layers of calcium carbonate crystals formed around an irritant in the mollusk 🐚💎

So it’s made of calcium carbonate. Didn’t know that. Thanks for sharing.

I did not know this 🤔
Pearls are wonderful🌟
700 $DEGEN for this picture because I like it

It's interesting, so it has many healthy minerals in it👌

Yes, a beautiful and rare pearl 💯💯💯💯

In perl community we grow together 
413 $DEGEN

I didn't know the chemical formula of oyster until now 🤔

how interesting. I did not know this about pearls
303 $DEGEN for you dear Friend