Revelation 2:17 To him will I give a white stone

¹⁷ He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the hidden manna, and will give him a white stone, and in the stone a new name written, which no man knoweth saving he that receiveth it. -Revelation 2:17 Bible, King James Version (KJV)

The Doctrine and Covenants Section 130 (Items of instruction given by Joseph Smith the Prophet, at Ramus, Illinois, April 2, 1843.)

6 The angels do not reside on a planet like this earth;

7 But they reside in the presence of God, on a globe like a sea of glass and fire, where all things for their glory are manifest, past, present, and future, and are continually before the Lord.

8 The place where God resides is a great Urim and Thummim.

9 This earth, in its sanctified and immortal state, will be made like unto crystal and will be a Urim and Thummim to the inhabitants who dwell thereon, whereby all things pertaining to an inferior kingdom, or all kingdoms of a lower order, will be manifest to those who dwell on it; and this earth will be Christ’s.

10 Then the white stone mentioned in Revelation 2:17, will become a Urim and Thummim to each individual who receives one, whereby things pertaining to a higher order of kingdoms will be made known;

11 And a white stone is given to each of those who come into the celestial kingdom, whereon is a new name written, which no man knoweth save he that receiveth it. The new name is the key word.

Many Masters give their disciples a Key Word or secret Name of God according to their initiates level of initiation or the higher Plane they are preparing to enter. One can either use the many Names of God on the various Planes such as LAM, RAM, YAM, HAM or use an even Higher Plane's Name of God, or Heavenly Essence of these Names, which is AM or the God referred to by Jesus and the Ascended Masters as the Mighty I AM Presence.

Apocalypse Revealed, by Emanuel Swedenborg, [1766], tr. by John Whitehead [1912], at sacred-texts.com

121.

And I will give him a white stone, signifies truths favoring and united to good. "A white stone" signifies this because in judgments votes were collected by stones, and by white stones those which were affirmative; that it is affirmative truths which are signified is, because "white" is predicated of truths (n. 167, 379); hence it is, that by a "white stone" are signified truths favoring good...