Ibicuruzwa ni serefegitura cyangwa ibice bidasanzwe. Igaragara umutuku wijimye cyangwa umutuku wijimye hamwe nubushuhe. Ibigize nyamukuru ni dioxyde ya silicon hamwe nimpinduka zamabara hamwe nubushuhe butandukanye. Usibye imikorere nkubururusilika gel, idafite chloride ya cobalt kandi ntabwo ari uburozi, ntacyo itwaye.