Is coral poisonous? Help please

Was grinding rice and noticed sometime after that my coral in the ring was missing
Help please..... I am not sure it fell into the grinder but i am not sure that it is not inside If it had fallen into and grinded what will happen. should i use the batter or not?

Thanks for any help :(

i think coral cannot be grinded in to fine paste,but still if u are doubted u should not use the batter.