The white pearl is the stone of Zebulun, for with his merchant ships he sailed the sea and drew his sustenance from the ocean from which the pearl, too, is drawn. The pearl has also the quality of bringing its owner sleep, and it is all the more to the credit of this tribe that they nevertheless spent their nights on commercial ventures to maintain their brother-tribe Issachar, that lived only for the study of the Torah. The pearl is, furthermore, round, like the fortune of the rich, that turns like a wheel, and in this way the wealthy tribe of Zebulun were kept in mind of the fickleness of fortune. Dan's stone was a species of topaz, in which was visible the inverted face of a man, for the Danites were sinful, turning good to evil, hence the inverted face in their stone. The turquoise was Naphtali's stone, for it gives its owner speed in riding, and Naphtali was "a hind let loose." Gad's stone was the crystal, that endows its owner with courage in battle, and hence served this warlike tribe that battled for the Lord as an admonition to fear none and build on God. The chrysolite was Asher's stone, and as this stone aids digestion and makes its owner sturdy and fat, so were the agricultural products of Asher's tribe of such excellent quality that they made fat those who ate of them. Joseph's stone was the onyx, that has the virtue of endowing him who wears it with grace, and truly, by his grace, did Joseph find favor in the eyes of all. Jasper was Benjamin's stone, and as this stone turns color, being now red, now green, now even black, so did Benjamin's feelings vary to his brothers. Sometimes he was angry with them for having sold into slavery Joseph, the only other brother by his mother Rachel, and in this mood he came near betraying their deed to his father; but, that he might not disgrace his brothers, he did not divulge their secret. To this discretion on his part alludes the Hebrew name of his stone, Yashpeh, which signifies, "There is a mouth," for Benjamin, though he had a mouth, did not utter the words that would have covered his brothers with disgrace. [357]