U+2B55, ⭕
HEAVY LARGE CIRCLE

[U+2B54]
Miscellaneous Symbols and Arrows
[U+2B56]
Presentations of ⭕︎
Text
style
Emoji
style
⭕︎ ⭕️
Note: Character's appearance
may be different on each system.
Text style is forced with ︎
and emoji style with ️

Emoji