As character names:

U+2B29 BLACK SMALL DIAMOND character (⬩)

As raw characters:

⬩

As a string of HTML entities:

⬩

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 172, hex 0xAC, octal \254, binary 10101100
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 169, hex 0xA9, octal \251, binary 10101001
This is continuation byte 2, expecting 0 more.

U+2B29	BLACK SMALL DIAMOND
	x (diamond operator - 22C4)
	x (small orange diamond - 1F538)