a flawed diamond used only for industrial purposes, esp. in crushed form for grinding and polishing
sometimes called bortz
Origin of bortprobably via Dutch boort from Old French bourt, bastard from Classical Latin burdus, hinny
- Poorly crystallized diamonds used for industrial cutting and abrasion.
- A carbonado.
Origin of bortProbably from Dutch boort tiny waste diamond pieces produced in the gem cutting process, bort probably from Old French bourt bastard from Late Latin burdus hinny probably of Celtic origin Burdō Burdōnus ancient Celtic masculine personal names derived from a word for a donkey or mule, animals admired for their robustness
- (uncountable) Poor quality diamond, used for industrial cutting or abrasion; a poorly crystallized diamond.