Famaritana: Vato volkano fantatra amin'ny anarana hoe pumice na basalt misy lavaka, karazana fitaovana azo ampiasaina sy miaro ny tontolo iainana izy io. Mirakitra mineraly sy singa bitika am-polony maro izy io, toy ny sodium, magnesium, aliminioma, silisiôma, kalsioma, titane, manganese, vy, nikela, kobalta ary molybdenum sy ny sisa.

Fampiasana: fanorenana, fitahirizana rano, fikosoham-bary, fitaovana sivana, karbônina fanaovana barbecue, maritrano tontolo iainana, fambolena tsy misy tany, vokatra haingon-trano sy sehatra hafa.

Loko: mena, mainty. fotsy
Azo amboarina ny habe: 3-6mm, 6-8mm, 8-10mm, 1-3sm, 3-6sm, 6-8sm, 8-10sm, 10-50sm. Fomba: vato, poti-javatra, vovoka.