کوراندوم
type: Concept
preferred label: corundum @en
related: یاقوت کبود

یاقوت کبود
type: Concept
broader: گوهر
preferred label: sapphire @en
related: کوراندوم

گوهر
type: Concept
narrower: یاقوت کبود
preferred label: gem @en