As character names:

U+25C7 WHITE 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 151, hex 0x97, octal \227, binary 10010111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 135, hex 0x87, octal \207, binary 10000111
This is continuation byte 2, expecting 0 more.

U+25C7	WHITE DIAMOND
	x (combining enclosing diamond - 20DF)
	x (diamond operator - 22C4)
	x (white diamond suit - 2662)
	x (white concave-sided diamond - 27E1)
	x (white medium diamond - 2B26)
	x (alchemical symbol for soap - 1F754)
	x (box drawings light diagonal diamond - 1FBAE)