The Wolfram Language not only allows you to mix arbitrary graphics into text, but also provides convenient font characters for some common shapes and icons.

■  ▪  ■  ▪  ▪  ▪  □  ▪  ◻  ▪  ▫  ▪  ■  ▪    ▪  ▮  ▪  ▯  ▪  ☒

\[FilledSquare]  ▪  \[FilledSmallSquare]  ▪  \[EmptySquare]  ▪  \[GraySquare]  ▪  ...

●  ▪    ▪  ○  ▪  ◦  ▪  ●  ▪  ◆  ▪  ◇  ▪  ✶  ▪  ★

\[FilledCircle]  ▪  \[FilledDiamond]  ▪  \[SixPointedStar]  ▪  ...

▶  ▪  ◀  ▪  ▲  ▪  ▼  ▪  △  ▪  ▽

\[FilledRightTriangle]  ▪  \[EmptyDownTriangle]  ▪  ...

Miscellaneous Icons

☺  ▪    ▪  ☹  ▪    ▪    ▪  ⌚  ▪  ✓  ▪    ▪    ▪    ▪  

\[HappySmiley]  ▪  \[WarningSign]  ▪  \[MathematicaIcon]  ▪  ...

PlotMarkers — use automatic markers to distinguish different collections of data points