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Chemical Formula | SiO2 |
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Composition | Silicon dioxide |
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Color | Colorless to white |
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Streak | White |
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Hardness | 8 |
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Crystal Forms and Aggregates |
(Tetragonal) Occurs only in microscopic, platy grains |
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Transparency | Transparent to translucent |
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Specific Gravity | 4.3 |
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Luster | Vitreous |
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Cleavage | |
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Fracture | |
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Tenacity | Brittle |
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Polymorphs | See Polymorphs of SiO2 |
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In Group | Oxides ; Simple oxides |
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All About | It is interesting to note that Stishovite is scientifically classified as an oxide and not as a silicate. This is because its crystal structure is identical to some of the oxide minerals, such as Rutile. Stishovite is isomorphous with Rutile. |
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Striking Features | Occurrence, hardness |
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Popularity (1-4) | 4 |
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Prevalence (1-3) | 3 |
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Demand (1-3) | 3 |
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Distinguishing Similar Minerals |
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Commonly Occurs With |
Iron/Iron-Nickel |
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Noteworthy Localities |
Only known occurrence is the Barringer Crater (also known as Meteor Crater) in Coconino Co., Arizona |
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Picture Icon Links |
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Picture Links | Sorry. No Images currently available. |
