Specimen Details
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Collection Names
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Number Of Specimens
1
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Specimen Nature
Form: Hand Specimen(s)
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Rock Name
Bostonite
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Rock Class
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Rock Group
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Rock Description
This specimen, also named Bostonite, is a fine-grained, pale-colored, grey or pinkish intrusive rock, which consists essentially of alkali-feldspar (orthoclase, perthite, anorthoclase, and albite). Some samples may contain a small amount of interstitial quartz and others may have a small percentage of calcium present in a sodic plagioclase feldspar. Accessory minerals include apatite, zircon and magnetite, with rare biotite, hornblende or pyroxene.
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Category
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Scientific Group
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Discipline
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Collecting Areas
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Type of Item