The Deathly Hallows consist of 3 artifacts said to have made by Death itself: The Elder Wand, The Resurrection Stone and The Invisibility Cloak. We have already seen that The Elder Wand is, although very powerful, a wand, which is common item among wizards. The same can be said about The Invisibility Cloak, a more powerful version of ordinary invisibility cloaks used among wizards.
However, I do not recall any mentions of resurrection stones other than the Deathly Hallow itself. Has there been any canon mentions that there were any?