In the Ether 3:1 we read:
1 And it came to pass that the brother of Jared, (now the number of the vessels which had been prepared was eight) went forth unto the mount, which they called the mount Shelem, because of its exceeding height, and did molten out of a rock sixteen small stones; and they were white and clear, even as transparent glass; and he did carry them in his hands upon the top of the mount, and cried again unto the Lord, saying:
In Joseph’s day, scholars didn’t believe that glass was known by civilizations as ancient as Jared’s, which was around 3000 B.C. Had Joseph been scouring the best scholarship of his day in order to write the Book of Mormon this would have been a major blunder. But, what at first appears to be a major blunder, turns out once again to be a bulls-eye. This pattern is familiar.
Hugh Nibley comments in his book Lehi in the Desert; The World of the Jaredites; There were Jaredites:
This would make the invention of glass far older than anyone dreamed it was until the recent finding of such objects as Egyptian glass beads from “the end of the third millennium B.C.”50 and “plaques of turquoise blue glass of excellent quality” in the possession of one of the very earliest queens of Egypt.51 “Very little . . . is known,” writes Newberry, “about the early history of glass,” though that history “can indeed be traced back to prehistoric times, for glass beads have been found in prehistoric graves.” 52 We need not be surprised if the occurrences of glass objects before the sixteenth century B.C. “are few and far between,”53 for glass rots, like wood, and it is a wonder that any of it at all survives from remote antiquity. There is all the difference in the world, moreover, between few glass objects and none at all. One clot of ruddy dirt is all we have to show that the Mesopotamians were using iron knives at the very beginning of the third millennium B.C.—but that is all we need. Likewise the earliest dated piece of glass known comes from the time of Amenhotep I; yet under his immediate successors glass vases appear that indicate an advanced technique in glass working: “they reveal the art in a high state of proficiency; that must be the outcome of a long series of experiments,” writes Newberry.54