Kev piav qhia: Pob zeb volcanic feem ntau hu ua pob zeb pumice, pob zeb basalt, lossis pob zeb lava, nws yog ib hom khoom siv ua haujlwm thiab ib puag ncig. Nws muaj ntau yam minerals thiab microelements, xws li sodium, magnesium, txhuas, silicon, calcium, titanium, manganese, hlau, nickel, cobalt thiab molybdenum thiab lwm yam. Uas siv dav rau kev ua vaj, pem teb, phab ntsa, cog, thiab kev lag luam acquirium.

Pob zeb volcanic Loj: 3-6mm, 6-8mm, 8-10mm, 1-3cm, 3-6cm, 6-8cm, 8-10cm, 10-50cm tuaj yeem hloov kho.
Roob hluav tawspob zebxim: liab, dub.
Roob hluav tawspob zebStyle: pob, hmoov, hmoov av, daim ntawv