Is there an escape sequence for Unicode characters?

[StephenG1CMZ]

just to explain why I thought I saw a domino in the character table, but others said it wasn't in the character set (and why the number given by the character table wasn't the one in Wikipedia):

The one I was seeing in the character table was actually the face of a dice or half a domino.
Still, that's good enough to use - I just need two of them.
Or it would be good enough to use, if only I could make them bigger!