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Item Number:
(470025-948) |
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REVIEWS (0)
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| Black, soft; most widely mined. |
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Item Number:
(470026-184) |
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REVIEWS (0)
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| Pale pink felsite, with small sanidine phenocrysts. |
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Item Number:
(470026-260) |
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REVIEWS (0)
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| Typical green-gray, fissile, clay-rich. |
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Item Number:
(470015-492) |
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REVIEWS (0)
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| Light grayish green, fine-grained, well-foliated, schistose. |
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Item Number:
(470025-166) |
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REVIEWS (0)
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| Examples of the Most Basic Rocks and Rock-Forming Minerals |
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Item Number:
(470026-278) |
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REVIEWS (0)
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| Slaty cleavage; contains hematite. |
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Item Number:
(470026-006) |
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REVIEWS (0)
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| Pink and gray bands, with biotite; shows good foliation. |
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Item Number:
(470025-842) |
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REVIEWS (0)
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| Well-cemented, medium-grained orthoquartzite. |
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Item Number:
(470154-094) |
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REVIEWS (0)
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| Samples of Intrusive and Extrusive Igneous Rocks |
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Item Number:
(470025-920) |
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REVIEWS (0)
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| Classic, dark; from the Columbia Plateau. |
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Item Number:
(470026-018) |
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REVIEWS (0)
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| Medium-grained with biotite. |
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Item Number:
(470025-168) |
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REVIEWS (0)
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| A Great Way to Begin Your Petrographic Studies |
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Item Number:
(470026-218) |
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REVIEWS (0)
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| Gray to brown mudstone with abundant silt. |
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Item Number:
(470015-462) |
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REVIEWS (0)
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| Light gray, fine small clasts. |
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Item Number:
(470015-484) |
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REVIEWS (0)
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| Fine crystalline, pure calcite. |
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Item Number:
(470026-142) |
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REVIEWS (0)
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| Banded volcanic glass. |
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