Gemma International Co.,Ltd. Is a leading polished diamond wholesaler and exporter in Thailand. The company has been registered since 1987 and is proud to have provided more than 25 years of integrity and reliability, a commitment to excellence and dedication to outstanding services.Gemma specializes in certified diamond from GIA and HRD with excellent cutting. All the goods have triple excellent sizes from .30 to 10 carats and above. Gemma is the ideal choice for your perfect diamond.