That trade in metal of the purest mould;
The wealthy Moor, that in the eastern rocks
Without control can pick his riches up
And in his house heap pearls like pebble-stones,
Receive them free, and sell them by the weight;
Bags of fiery opals, sapphires, emeralds,
Beauteous rubies, sparkling diamonds,
And seld-seen costly stones of so great price
As one of them indifferently rated
And of a carat of this quantity