"Two stones"

1. Ex. 28: 9, 11-12
     9 And thou shalt take two onyx stones, and grave on them the names of the children of Israel:
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     11 With the work of an engraver in stone, like the engravings of a signet, shalt thou engrave the two stones with the names of the children of Israel: thou shalt make them to be set in ouches of gold.
     12 And thou shalt put the two stones upon the shoulders of the ephod for stones of memorial unto the children of Israel: and Aaron shall bear their names before the Lord upon his two shoulders for a memorial.
2. 1 Ne. 17: 11
     11 And it came to pass that I, Nephi, did make a bellows wherewith to blow the fire, of the skins of beasts; and after I had made a bellows, that I might have wherewith to blow the fire, I did smite two stones together that I might make fire.
3. Mosiah 28: 13
     13 And now he translated them by the means of those two stones which were fastened into the two rims of a bow.
4. Ether 3: 23, 28
     23 And behold, these two stones will I give unto thee, and ye shall seal them up also with the things which ye shall write.
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     28 And it came to pass that the Lord commanded him that he should seal up the two stones which he had received, and show them not, until the Lord should show them unto the children of men.
5. JS-H 1: 35, 52
     35 Also, that there were two stones in silver bows—and these stones, fastened to a breastplate, constituted what is called the Urim and Thummim—deposited with the plates; and the possession and use of these stones were what constituted “seers” in ancient or former times; and that God had prepared them for the purpose of translating the book.
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     52 Having removed the earth, I obtained a lever, which I got fixed under the edge of the stone, and with a little exertion raised it up. I looked in, and there indeed did I behold the plates, the Urim and Thummim, and the breastplate, as stated by the messenger. The box in which they lay was formed by laying stones together in some kind of cement. In the bottom of the box were laid two stones crossways of the box, and on these stones lay the plates and the other things with them.