Charles Ellicott Commentary 2 Chronicles 9:20

"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: silver was nothing accounted of in the days of Solomon." — 2 Chronicles 9:20 (ASV)

None were of silver; it was not anything accounted of. —The not appears to be rightly supplied by our version; compare 1 Kings 10:21, with which the verse otherwise entirely agrees.