Ways Unicode characters can be used for rating scales

• stars (e.g. 1 star out of 5)
  • ☆ U+2606 white star
  • ★ U+2605 black star
• asterism-related:
  • * U+002A asterisk
  • ⁑ U+2051 two asterisks aligned vertically
  • ⁂ U+2042 asterism
• Consumer-Reports style
  • ○ U+25CB white circle
  • ◐ U+25D0 circle with left half black
  • ● U+25CF black circle
• other circles
• color-filled circles, squares, diamonds, triangles, ...
• blocks — different sizes
• quadrants
  • ▖ U+2596 quadrant lower left
  • ▚ U+259A quadrant upper left and lower right
  • ▟ U+259F quadrant upper right, lower left, and lower right
  • ▉ U+2589 left seven-eights block