This page illustrates Carat or "Karat" purity of gold standards around the world

Arabic countries, Far East (China, Hong Kong, Taiwan), Malaysia, Indonesia 24-karat "Chuk Kam" (99.0% min)
Arabic countries, Bangladesh, India, Pakistan, Malaysia, and Sri Lanka 22-karat (91.6%)
Arabic countries in the Persian Gulf region 21-carat (87.5%), 18-karat (75.0%) in most Egypt
Europe - Southern / Portugal 19.2-karat (80.0%)
Europe - Southern / Mediterranean 18-karat (75.0%)
Europe - Northern Germany etc. 8- to 18-karat (33.3 - 75.0%)
Russia/former USSR 9- (37.5%) and 14-karat/old 583 and new 585 (58.5%)
United Kingdom 9-carat to 22 carat (37.5-91.6%)
United States, Canada 10-karat to 18-karat (41.7-75%)