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Rock+Collections
Description:
Glassy; most specimens float in water.
Description:
Classic, very coarse-grained igneous texture.
Catalog Number:
(470025-908)
Description:
A sawn and lacquered slab of classic Precambrian banded layers of hematite (iron) and quartz. Average size: 3" x 4". Ontario, Canada.
Description:
Dense Dolostone.
Catalog Number:
(470025-128)
Description:
[NA_SciEd] Ward's® Quartzite (Kyanite)
Description:
Pink and gray bands, with biotite; shows good foliation.
Description:
Chlorite-bearing.
Description:
Fine crystalline, pure calcite.
Description:
Shiny black volcanic glass showing conchoidal fracture and some spherulites.
Description:
Hematite-cemented quartz; orthoquartzite.
Description:
Classic, dark; from the Columbia Plateau.
Description:
Coarse-grained plagioclase and pyroxene with some olivine.
Description:
Gray, fine, friable, with abundant small sanidine crystal fragments.
Description:
High grade metamorphosed rock showing bands of quartz, feldspar, and biotite.
Description:
Quartzite is hard, non-foliated rock formed from metamorphosed quartz sandstones.
Description:
Black, soft; most widely mined.
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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the
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