"Sample+Dippers"

Brown, fluorescent crystals intergrown in dolomite rock.

Extended Study of the Effects of Weathering.

Brown, earthy, massive; used for yellow pigment.

Look at Evolution through the Study of Homology

Light gray, earthy.

Brownish gray, kerogen-rich; commercial oil source.

Use the ideal gas law to determine the ambient pressure in the room.

How Healthy is the Stream?

Easy to use microtome to prepare slide sections.

Manganese Instrumental Test 0 to 30 ppm

For drag style collecting.

White, fine, massive, opaque to slightly translucent.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Gray, fine, friable, with abundant small sanidine crystal fragments.

Pink/gray coarse carbonate rock.

Coarse-grained, with microcline, biotite and horblende phenocrysts.