| Hematite | |
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| Formula: | Fe2O3 |
| Locality: | Diamond Hill (Ashaway Village), Ashaway, Hopkinton, Washington Co., Rhode Island, USA |
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| Ilmenite | |
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| Formula: | Fe2+TiO3 |
| Locality: | Larsen Granite quarry, Hopkinton, Washington Co., Rhode Island, USA |
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| Microcline | |
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| Formula: | KAlSi3O8 |
| Locality: | Larsen Granite quarry, Hopkinton, Washington Co., Rhode Island, USA |
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| Montmorillonite | |
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| Formula: | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Locality: | Diamond Hill (Ashaway Village), Ashaway, Hopkinton, Washington Co., Rhode Island, USA |
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| Quartz |  |
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| Formula: | SiO2 |
| Locality: | Diamond Hill (Ashaway Village), Ashaway, Hopkinton, Washington Co., Rhode Island, USA |
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| Photo: Quartz from Diamond Hill, Ashaway, Hopkinton, Washington Co., Rhode Island, USA |
| Quartz var: Amethyst |  |
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| Formula: | SiO2 |
| Locality: | Diamond Hill (Ashaway Village), Ashaway, Hopkinton, Washington Co., Rhode Island, USA |
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| Photo: © 2000 John H. Betts. Amethyst from Diamond Hill, Ashaway, Hopkinton, Washington Co., Rhode Island, USA |
| Quartz var: Milky Quartz |  |
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| Locality: | Diamond Hill (Ashaway Village), Ashaway, Hopkinton, Washington Co., Rhode Island, USA |
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| Photo: © 2001 John H. Betts. Milky Quartz from Diamond Hill, Ashaway, Hopkinton, Washington Co., Rhode Island, USA |
7 entries listed. 5 valid minerals.