DIAMOND WITH BOTTOM HALF BLACK U+2B19

BlockMiscellaneous Symbols and Arrows
CategoryOther Symbol
UTF-80xE2 0xAC 0x99
UTF-160xFF 0xFE 0x19 0x2B
UTF-320xFF 0xFE 0x0 0x0 0x19 0x2B 0x0 0x0
HTML⬙
Pythonu"\u2B19"