According to Baidu Encyclopedia, agate beads bought in jewelry stores have been appraised by experts and can be guaranteed to be true.

Agate, also known as agate, Kate Ma and agate, is a kind of chalcedony mineral, which is often banded and lumpy with opal and aphanitic. Its hardness is 6.5-7 degrees, its specific gravity is 2.65, and its color is layered, translucent or opaque.