Other speleothems include flowstone that looks like a rock river, rounded polished cave pearls
, and feathery aragonite.
It even has formations called cave pearls
! Just like the pearls that oysters make, cave pearls
are made of -- formed around a nucleus of --.
If dripping water coats sand grains with calcite, cave pearls
Others are called fried eggs, popcorn, cave pearls
, and soda straws, because that's just what they look like!