None were of silver ... — See 2 Chronicles 9:27, “The king made silver in Jerusalem as stones.” The importation of silver (see 1 Kings 10:22) was by the navy of Tarshish; and the mention of the plentifulness of silver seems the reason for noticing the existence of this navy.
Related Commentaries of 1 Kings 10:21
1 Kings 10:21
21 And all king Solomon's drinking vessels were of gold, and all the vessels of the house of the forest of Lebanon were of pure gold; none were of silver:i it was nothing accounted of in the days of Solomon.