Home / Standards / GB/T 44914-2024 GB/T 44914-2024 Active Hetianyu grading 和田玉分级 Standard Type GBT ICS 39.060 CCS D59 Status 现行 Issue Date 2024-11-28 Implementation 2025-06-01 Responsible Dept 自然资源部(国土) Drafting Unit N/A