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Rock+Collections
Description:
Classic, very coarse-grained igneous texture.
Description:
Fine crystalline, pure calcite.
Description:
Gray to buff, with numerous ooliths and fossil fragments.
Description:
Shiny black volcanic glass showing conchoidal fracture and some spherulites.
Description:
Gray, fine, friable, with abundant small sanidine crystal fragments.
Catalog Number:
(470015-154)
Description:
Colorful visual reference of various stages of rock transformation.
Description:
Gray metamorphosed shale showing "slaty cleavage".
Catalog Number:
(470015-460)
Description:
Shows porphyritic texture in a fine dark matrix abundant large feldspar phenocrysts. Hand specimen.
Description:
Pink/grey marble colored metamorphosed carbonate rock.
Description:
Gray with line crinoid columnal fragments.
Description:
Black, soft; most widely mined.
Description:
Soapstone is a talc-schist primarily composed of talc.
Description:
Brownish black, intermediate stage between peat and bituminous coal.
Catalog Number:
(470014-828)
Description:
Students determine a mineral's hardness between five and 10 on Mohs' scale.
Catalog Number:
(470026-298)
Description:
White, very dark green, and very dark red to light red granoblastic intergrowth of wollastonite, diopside, and andradite.
Description:
Diorite is a mix of dark pyroxene and light andesine provides perfect representation of an intermediate igneous rock.
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