Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Calcium Amphibole Subgroup from
Guocheng Au deposit (Tudui-Shawang Au deposit), Haiyang City, Yantai, Shandong, China


Locality type:Deposit
Classification
Species:'Calcium Amphibole Subgroup' (not an IMA approved species)
Formula:AnCa2(C2+5-mCm3+)(Si8-(n+m)Al(n+m))W2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcium Amphibole Subgroup data
Locality Data:Click here to view Guocheng Au deposit (Tudui-Shawang Au deposit), Haiyang City, Yantai, Shandong, China
Data Identifiers
Mindat Occurrence Record ID:1989885
Long-form Identifier:1:3:1989885:0
GUID (UUID V4):0
Nearest other occurrences of Calcium Amphibole Subgroup
48.1km (29.9 miles) ⓘXidouya Au deposit, Qixia City, Yantai, Shandong, China
59.7km (37.1 miles) ⓘYanshan Au deposit, Penglai City, Yantai, Shandong, China
61.1km (38.0 miles) ⓘAishan Pluton, Penglai City, Yantai, Shandong, China
62.4km (38.8 miles) ⓘShijia Au deposit, Penglai City, Yantai, Shandong, China
74.8km (46.5 miles) ⓘXiadian Mine, Shanhou-Beipo gold field, Zhaoyuan City, Yantai, Shandong, China
91.1km (56.6 miles) ⓘNansu Mo occurrence, Shanhou-Beipo gold field, Zhaoyuan City, Yantai, Shandong, China
98.2km (61.0 miles) ⓘJiaojia Mine, Jiaojia-Xincheng Gold camp, Laizhou City, Yantai, Shandong, China
98.3km (61.1 miles) ⓘXincheng Mine, Xincheng-Hexi ore field, Jiaojia-Xincheng Gold camp, Laizhou City, Yantai, Shandong, China
References
Zhang, Guoqing; Wang, Gongwen; Peng, Qingming; Liu, Kun; Chen, Yuchang; Cao, Yi (2026) Drill-Core SWIR-Based 3D Alteration Modeling and Machine Learning for Gold Prospectivity Prediction at the Tudui–Shawang Gold Deposit, Jiaodong Peninsula. Minerals, 16 (8). doi:10.3390/min16080855
 
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