Or, “It is a piece of wood (Jeremiah 10:8 note); yea, beaten silver it is, which is brought from Tarshish, and gold from Uphaz: it is the work etc.”
Tarshish ... Uphaz - See the marginal reference and Genesis 10:4. Possibly Uphaz was a place in the neighborhood of the River Hyphasis.
Blue and purple - Both colors were purple, from dyes obtained from shellfish: but the former had a violet, the latter a red tinge.