"WardsSci000478"

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Ward's® Sandstone (Siliceous)

Gray, fine to medium-grained “Berea grit”.

Clearance

Chert is a microcrystalline, hard, silica mineral.

Clearance

Scoria is a dark-colored rock formed from lava with a high gas content.

Limestone is a gray calcium carbonate that will fizz with dilute HCl.

Sale

Shale is a rich, gray fissile clay rock.

Sale

Bituminous rich black shale for hands-on investigations.

Sale

Hematite-cemented quartz; orthoquartzite.

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