Police hope that questioning of the nine may lead to more arrests.
Phuket police commander Maj Gen Pachara Boonyasit showed journalists 2,328 ya bah pills in 46 packets.
The eight men and one woman were named as Pongsakorn Suknuan, Nattapong Srikaew, Nattanon Chaitan, Wisat Paosri, Niroj Jirapan, Sarawut Sudmadam, Wittaya Apai, Sittichai Sales and Rungfah Kalapat.
All have been charged with possession of a Category 1 drug with intent to sell.