This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2657 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
The bishop (♗, ♝) is a piece in the game of chess. It moves and captures along diagonals without jumping over interfering pieces. Each player begins the game with two bishops. The starting squares are c1 and f1 for White's bishops, and c8 and f8 for Black's bishops.
Representations
System
Representation (click value to copy)
Nº
9815
UTF-8
E2 99 97
UTF-16
26 57
UTF-32
00 00 26 57
URL-Quoted
%E2%99%97
HTML hex reference
♗
Wrong windows-1252 Mojibake
â™—
Encoding: GB18030 (hex bytes)
81 37 AA 39
RFC 5137
\u'2657'
Bash and Zsh inside echo -e
\u2657
C and C++
\u2657
C#
\u2657
CSS
\002657
Excel
=UNICHAR(9815)
Go
\u2657
JavaScript
\u2657
Modern JavaScript since ES6
\u{2657}
JSON
\u2657
Java
\u2657
Lua
\u{2657}
Matlab
char(9815)
Perl
"\x{2657}"
PHP
\u{2657}
PostgreSQL
U&'\2657'
PowerShell
`u{2657}
Python
\u2657
Ruby
\u{2657}
Rust
\u{2657}
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