sentences:  Through the Casa da Índia the royal officials were appointed overseas, and royal decrees and regulations were spread.Between 1506 and 1570, Casa da Índia enforced the royal monopoly on all imports and sales of spices - pepper, cloves, and cinnamon - silk and shellac, as well as on the export of gold, silver, copper and coral, and levied a 30 percent tax on the profits of other articles.The royal monopoly on copper exports especially made great gains, as copper was in high demand in India and West Africa, to where it was exported in the form of armlets called "manillas", which served as a form of money.