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+2684 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Dice (sg.: die or dice) are small, throwable objects with marked sides that can rest in multiple positions. They are used for generating random values, commonly as part of tabletop games, including dice games, board games, role-playing games, and games of chance.
A traditional die is a cube with each of its six faces marked with a different number of dots (pips) from one to six. When thrown or rolled, the die comes to rest showing a random integer from one to six on its upper surface, with each value being equally likely. Dice may also have polyhedral or irregular shapes, may have faces marked with numerals or symbols instead of pips and may have their numbers carved out from the material of the dice instead of marked on it. Loaded dice are specifically designed or modified to favor some results over others for cheating or entertainment.
Representations
System
Representation (click value to copy)
Nº
9860
UTF-8
E2 9A 84
UTF-16
26 84
UTF-32
00 00 26 84
URL-Quoted
%E2%9A%84
HTML hex reference
⚄
Wrong windows-1252 Mojibake
âš„
Encoding: GB18030 (hex bytes)
81 37 AF 34
RFC 5137
\u'2684'
Bash and Zsh inside echo -e
\u2684
C and C++
\u2684
C#
\u2684
CSS
\002684
Excel
=UNICHAR(9860)
Go
\u2684
JavaScript
\u2684
Modern JavaScript since ES6
\u{2684}
JSON
\u2684
Java
\u2684
Lua
\u{2684}
Matlab
char(9860)
Perl
"\x{2684}"
PHP
\u{2684}
PostgreSQL
U&'\2684'
PowerShell
`u{2684}
Python
\u2684
Ruby
\u{2684}
Rust
\u{2684}
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