"Lucy Mack Smith’s physical description of the interpreters/Urim and Thummim that Joseph Smith had in his possession."
“On the morning of September 22, after Joseph had returned from the hill, he placed the article [the Nephite interpreters] of which he spoke into my hands, and, upon examination, I found that it consisted of two smooth three-cornered diamonds set in glass, and the glasses were set in silver bows, which were connected with each other in much the same way as old fashioned spectacles. . . . He [Joseph Smith] handed me the breastplate spoken of in his history. It was wrapped in a thin muslin handkerchief, so thin that I could feel its proportions without any difficulty. It was concave on one side and convex on the other, and extended from the neck downwards, as far as the center of the stomach of a man of extraordinary size. It had four straps of the same material, for the purpose of fastening it to the breast.” (History of Joseph Smith by His Mother Lucy Mack Smith)