Famaritana: Vato volkanika izay fantatra amin'ny anarana hoe pumice, vato basalt, na lava rock, dia karazana fitaovana miasa sy tontolo iainana.Misy mineraly am-polony sy microelements, toy ny sodium, magnesium, aliminioma, silisiôma, calcium, titane, manganese, vy, nikela, kobalta ary molybdène ary ny sisa. .

Volkano vato Size: 3-6mm,6-8mm,8-10mm,1-3cm,3-6cm,6-8cm,8-10cm,10-50cm azo namboarina.
volkanovatoloko: mena, mainty.
volkanovatoStyle: vongan, potikely, vovoka, taratasy