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Rock+Collections
Description:
Gray, fine-grained, massive contact rock.
Description:
Breccia is a sedimentary rock made up of angular rock fragments.
Description:
Small, rounded pebbles and tightly cemented granules.
Description:
Red, medium, to coarse-grained iron oxide cement; shows hematite bands.
Description:
Slaty cleavage; contains hematite.
Description:
Coarse, “salt and pepper”: dark pyroxene and light andesine.
Description:
Medium-grained with biotite.
Catalog Number:
(470218-840)
Description:
Without Glued-On Grains That Wear Off, Chart Stands up to Repeated use.
Description:
Rhyolite is a pale, pink felsic rock with lower density than most igneous rocks.
Description:
White, mature, friable.
Description:
Classic, very coarse-grained igneous texture.
Description:
Pink and gray bands, with biotite; shows good foliation.
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:
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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