New limited find of blue topaz from Guobaoshan, Gansu, China.
Reference: http://geochina.cgs.gov.cn/en/article/doi/10.12029/gc20240626001
Collected: 2024
hard, glassy orthorhombic crystals from pegmatites and rhyolites; colors range from colorless to pink; sharp terminations aid identification, localitie…
Comments