A variety of spinel of a yellow or orange-red colour; (with plural) a stone of this variety.
Origin
Mid 17th century; earliest use found in Thomas Nicols (fl. 1652), writer on gemstones. In some forms from French rubacelle from rubace + -elle. In some forms from French rubicelle from rubis + -elle.
Definition of rubicelle in US English:
rubicelle
nounˈruːbɪsɛl
Mineralogy
A variety of spinel of a yellow or orange-red colour; (with plural) a stone of this variety.
Origin
Mid 17th century; earliest use found in Thomas Nicols (fl. 1652), writer on gemstones. In some forms from French rubacelle from rubace + -elle. In some forms from French rubicelle from rubis + -elle.