Nkọwa: Nkume mgbawa ugwu nke a na-akpọkarị nkume pumice, nkume basalt, ma ọ bụ nkume lava, 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. A na-ejikarị ya eme ihe n'ubi, ala, mgbidi, osisi, na ụlọ ọrụ acqurium.

Nkume mgbawa ugwu Nha: 3-6mm, 6-8mm, 8-10mm, 1-3cm, 3-6cm, 6-8cm, 8-10cm, 10-50cm enwere ike ịhazi ya.
Ugwu mgbawa ugwunkumeagba: uhie, oji.
Ugwu mgbawa ugwunkumeỤdị: akpụ, ihe dị nro, ntụ ntụ, mpempe akwụkwọ