Tumblr thread, one user says that archeologists identify human remains by taste. A second user points out that this is not true, bone is identified as not a normal rock by touching it to your tongue and seeing if it sticks. If it does then bone.
Third user shares a poem they wrote: mai nam is jane and wen i dig i fynde some roks both smol and big i put my tung upon the stone for science yes i lik the bone
4th user is an archeologist and is crying laughing with a bunch of other archeologists and they’re going to have shirts made with the poem.
bone is less heavy than stone, also you can see bone has different surface structure.
Source: asked an archaeologist who thinks that although some people she knows do lik the bone, it’s not necessary.