The dzi beads on the market are often processed by acid etching on agate.

The real dzi beads were originally polished from conch fossils. Later, due to the scarcity of fossils, jade sedimentary rocks (nine-eye shale) containing agate components were used as raw materials for dzi beads and polished as Buddhist treasures.

With the decrease of nine-eye shale, we began to make dzi beads (etched agate) on agate by chemical methods.

At present, some dzi beads on the market are made of artificial materials such as glass and plastic.

So if the appraisal certificate says agate, it can be considered as a real dzi bead (after all, it is also a handicraft), but the price is not very expensive.