U+25C6 "◆" Black Diamond Unicode Character

U+25C6 "◆" Black Diamond is a solid, filled geometric shape that represents a diamond or rhombus and belongs to the Geometric Shapes block, encoded in Unicode 1.1 in 1993. It is commonly used in digital typography as a decorative symbol or bullet point, in user interface design to indicate a special menu item or selection, and in mathematics or logic to denote a modal operator or the end of a proof. Its solid black form provides a strong visual contrast, making it useful for diagrams, lists, and icons where a simple, bold marking is needed.