What Emoji can be used in Delphi Source Code?

I've noticed that some emoji and special characters are supported as variable names in Delphi such as

var
  ❤ : string;
  ⅖ : double;
begin
  ❤ := 'My heart';
  ShowMessage(❤);
  ⅖ := 0.4;
  ShowMessage(⅖.ToString);
end;

Does anyone know a complete list of interesting characters that can be used? It's possible to bring up emoji characters in Win10 via Win+[.] (The windows key plus dot).