Nkọwa: Nkume mgbawa ugwu nke a na-akpọkarị pumice ma ọ bụ porous basalt, ọ bụ ụdị ihe bara uru na gburugburu ebe obibi. O nwere ọtụtụ mineral na microelements, dịka sodium, magnesium, aluminom, silicon, calcium, titanium, manganese, iron, nickel, cobalt na molybdenum na ndị ọzọ.

Ojiji: owuwu, nchekwa mmiri, igwe egweri, ihe nzacha, carbon barbecue, usoro ala, ịkọ ihe na-enweghị ájá, ngwaahịa ịchọ mma na ubi ndị ọzọ.

Agba: ọbara ọbara, oji. ọcha
nha: 3-6mm, 6-8mm, 8-10mm, 1-3cm, 3-6cm, 6-8cm, 8-10cm, 10-50cm nwere ike ịhazi ya. Ụdị: nkume, ihe ntụ ntụ.