VIOLA Private Business ni mtoa ya bidhaa na huduma kama vile garnet,chamotte,yaspi,andalusite,feldspar,silika, asili,silika, asili, chembechembe,silika, asili, unga,gumegume au chert,diatomite, jina kibadala / tripolite,cristobalite,corundum,augite,agate na vito,hornblende,olivine,mwamba kioo,sillimanite / fibrolite,vermiculite,emery,almasi, bort, carbonados,almasi, rangi, mbaya,almasi, colorless, mbaya,emiradi, mbaya,garnets, mbaya,jade, mbaya,lapis lazuli (lazurite), mbaya,malachite, mbaya,moonstones, mbaya,opals, mbaya,peridot, mbaya,marijani, mbaya,johari, mbaya,spinel, mbaya,tanzanite, mbaya,topazi, mbaya,tourmaline, mbaya,turquoise, mbaya,zircon, mbaya,chrysoberyl, mbaya,citrine, mbaya,beryl, mbaya,aquamarines, mbaya,amethysts, mbaya,amber, mbaya,alexandrite, mbaya,mika, mbichi,quartz,mika, kusindika.