🜹

Alternative forms
⚹, ✳. The lines may end in serifs. Newton used a six-point $⟨⚹⟩$ for sal ammoniac itself but an eight-point $⟨🜹⟩$ in compound symbols.

Symbol

 * 1)  sal ammoniac (ammonium chloride, NH4Cl)
 * 2)  star regulus (antimony metal, Sb)