Most of the major appraisals are submitted before 12 am, and the certificates can only be obtained after 4 pm. GIC certificate of China Geo University (Wuhan) Jewelry Testing Center is reliable. GIC, also known as Jewellery College of China Geo University, is a famous academic institution. Its jewelry appraisal is the most authoritative appraisal institution in China, and its appraisal conclusion is also very authoritative in the industry.