About WHITE DIAMOND CONTAINING BLACK SMALL DIAMOND
White Diamond Containing Black Small Diamond (U+25C8) is a Unicode other symbol from the Geometric Shapes block. It resides on Plane 0 (BMP, Basic Multilingual Plane), has bidirectional class ON (other neutrals), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as ◈ or ◈.