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Etymology
A 'crown of calcination/smelting': a crown $⟨🜰/🜲⟩$ or $⟨🜵⟩$ regulus at top and $⟨♈|♈&#xFE0E;⟩$ or $⟨🜴⟩$ at bottom; the last includes $⟨♈&#xFE0E;⟩$ calcination.

Symbol

 * 1)  regulus of iron,  : metallic antimony prepared by use of iron; scoria from refining stibnite (antimony ore) with iron