Code point
U+2B25
Glyph appearance depends on your fonts.
U+2B25
SoU+2B25 BLACK MEDIUM DIAMOND is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Miscellaneous Symbols and Arrows block.
Choose the representation you need, then copy its value.
U+2B25
11045
⬥
⬥
E2 AC A5
2B25
00002B25
%E2%AC%A5
\u2B25
\u2B25
\u2B25
\2B25