Diamond enhancements are specific treatments, performed on natural diamonds (usually those already cut and polished into gems), which are designed to improve the visual gemological characteristics of the diamond in one or more ways.
Mandarin is the language of instruction of China and Taiwan. Mandarin is one of five major regional languages of China. It spreads wider than any other regional language, from the whole northern part of China down to Yunnan Province in the southwest corner of China.
Standard Chinese, which is also referred to as Mandarin, is the official language of the People's Republic of China and Taiwan (Republic of China) and one of the four official languages of Singapore. It is also one of the most frequently used varieties of Chinese among Chinese diaspora communities internationally.