Kev piav qhia: Pob zeb volcanic feem ntau hu ua pumice lossis porous basalt, nws yog ib hom khoom siv 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.

Siv: kev tsim kho, kev txuag dej, kev sib tsoo, cov khoom siv lim dej, barbecuecarbon, toj roob hauv pes architecture, soilless cultivation, ornamental khoom thiab lwm yam teb.

Xim: liab, dub.dawb
loj: 3-6mm, 6-8mm, 8-10mm, 1-3cm, 3-6cm, 6-8cm, 8-10cm, 10-50cm tuaj yeem ua raws li koj xav tau. Hom: pob zeb, hmoov av, hmoov.