It was Bruce McConkie…wrong guy, sorry about that.
“In imitation of the true order of heaven where seers receive revelation from God through the Urim and Thummim, the devil gives revelations to some of his followers through peepstones or crystal balls.” Bruce R. McConkie, “Mormon Doctrine”
This goes along with D&C 28:11, where Hiram Page was claiming he received revelation via a peep stone. McConkie here, is making a difference between peep stones and the U&T. Not addressing Smith’s usage of peep stones. In McConkie’s time peep stones being used by JS was viewed as follows.
Joseph Fielding Smith did write: “While the statement has been made by some writers that the Prophet Joseph Smith used a seer stone part of the time in his translating of the record, and information points to the fact that he did have in his possession such a stone, yet there is no authentic statement in the history of the Church which states that the use of such a stone was made in that translation. The information is all hearsay, and personally, I do not believe that this stone was used for this purpose.” Joseph Fielding Smith, “Doctrines of Salvation”