a heart of gold

heart of gold

A sincere, generous, and kind nature. Sarah always goes out of her way to help everyone she can—she really has a heart of gold.
See also: gold, heart, of
Farlex Dictionary of Idioms.

a heart of gold

COMMON If someone has a heart of gold, they are kind and generous, and enjoy helping other people. Note: The heart is traditionally regarded as the centre of the emotions. He's a tough guy, but with a heart of gold. He helped all the local sporting organisations — bowls, hockey, rugby and tennis. He had a heart of gold.
See also: gold, heart, of
Collins COBUILD Idioms Dictionary, 3rd ed.

heart of gold, (to have) a

A singularly kind person. This term dates from the sixteenth century and was already well known by the time Shakespeare wrote Henry V (1599), in which Pistol describes his master: “The king’s a bawcock, and a heart of gold” (4.1). (A bawcock, in Elizabethan jargon, was a fine fellow; the term comes from the French beau coq, “fine bird.”)
See also: heart, of
The Dictionary of Clichés by Christine Ammer
See also:
  • heart of gold
  • heart of gold, (to have) a
  • have a heart of gold
  • go gold
  • goldbricker
  • gold-plated
  • gold-plate
  • goldbrick
  • strike gold
  • a gold mine