Code point
U+2666
Glyph appearance depends on your fonts.
U+2666
SoU+2666 BLACK DIAMOND SUIT is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Miscellaneous Symbols block.
Choose the representation you need, then copy its value.
U+2666
9830
♦
♦
♦
E2 99 A6
2666
00002666
%E2%99%A6
\u2666
\u2666
\u2666
\2666