Read it through once

And we saw little jade gods, to hang around the neck—not everybody's, but sacred to the necks of natives of rank. Also jade weapons, and many kinds of jade trinkets—all made out of that excessively hard stone without the help of any tool of iron. And some of these things had small round holes bored through them—nobody knows how it was done; a mystery, a lost art. I think it was said that if you want such a hole bored in a piece of jade now, you must send it to London or Amsterdam where the lapidaries are.