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Peaked Hill Quarry, Gilead, Oxford Co., Maine, USA
List of minerals arranged by Dana 8th Edition classification
| Group 51 - NESOSILICATES Insular SiO4 Groups Only | ||
|---|---|---|
| Insular SiO4 Groups Only with cations in [6] and >[6] coordination | ||
| Almandine | 51.4.3a.2 | Fe2+3Al2(SiO4)3 |
| Group 61 - CYCLOSILICATES Six-Membered Rings | ||
| Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution | ||
| Beryl | 61.1.1.1 | Be3Al2(Si6O18) |
| Six-Membered Rings with borate groups | ||
| Schorl | 61.3.1.10 | Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH) |
| Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings | ||
| Sheets of 6-membered rings with 2:1 layers | ||
| Annite | 71.2.2b.3 | KFe2+3(AlSi3O10)(OH)2 |
| Muscovite | 71.2.2a.1 | KAl2(AlSi3O10)(OH)2 |
| Group 75 - TECTOSILICATES Si Tetrahedral Frameworks | ||
| Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si | ||
| Quartz | 75.1.3.1 | SiO2 |
| Group 76 - TECTOSILICATES Al-Si Framework | ||
| Al-Si Framework with Al-Si frameworks | ||
| Albite | 76.1.3.1 | NaAlSi3O8 |
| Microcline | 76.1.1.5 | KAlSi3O8 |
| Unclassified Minerals | ||
| Beryl var: Aquamarine ? | - | Be3Al2Si6O18 |
| Biotite | - | |
10 entries listed. 9 valid minerals.
References
Cameron, Eugene N.; and others (1954) Pegmatite investigations, 1942-45, in New England. USGS Professional Paper 255.
King, V. (ed.), 2009, Maine feldspar, Families, and Feuds
King, V. (ed.), 2009, Maine feldspar, Families, and Feuds
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