Ana samun ƙwallon yumbu daga foda na yumbu na zamani kamar alumina (Al₂O₃), zirconia (ZrO₂), silicon nitride (Si₃N₄), da silicon carbide (SiC). Waɗannan kayan albarkatun ƙasa, waɗanda aka samo a matsayin ƙananan ƙwayoyin halitta, suna yin aikin ƙarfe na foda: an haɗa su da masu ɗaurewa, an samar da su zuwa siffofi masu siffar ƙwallo ta hanyar matsi na isostatic ko injection molding. Sannan ana yin simintin preforms a 1,400–2,200°C don ƙirƙirar tsari mai yawa, iri ɗaya. Bayan sintering, niƙa daidai da gogewa yana ƙara musu juriya zuwa matakin micron.

Kwallayen yumbu suna ba da amfani iri-iri saboda ƙarfinsu da juriyarsu ga tsatsa. A cikin bearings, suna rage gogayya a cikin injunan sauri kamar motocin lantarki da haƙoran haƙora, wanda ke ƙara inganci. Ga bawuloli da famfo, kayan kamar silicon nitride suna jure wa sinadarai masu tsauri a masana'antar mai da magunguna, suna tabbatar da tsawon rai. A cikin masana'antar semiconductor, ƙwallon yumbu marasa sarrafawa suna tsaftace abubuwan da ke da laushi ba tare da gurɓatawa ba. Hakanan suna aiki azaman kayan aiki mai gogewa a cikin gogewa daidai don sassan sararin samaniya ko kayan ado, suna samar da ƙarewa mai santsi.