"WardsSci000478"

Epidote (Single crystal), Ward's

White, fine, massive, opaque to slightly translucent.

Light gray, earthy.

Rare cast of this early medusiform vendozoan from the precambrian ediacaran beds of the mistaken point formation. Cape race, Newfoundland.

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Large, black, rounded tektite, 1 1/2". Thailand.

Brownish gray, kerogen-rich; commercial oil source.

Survey set improves student's recognition of all three major rock groups.

Gray-to-brown basaltic, with over 50% vesicles.

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Polished, etched iron meteorite slice showing Widmanstatten structure, 1–1 1/2".

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Measure relative humidity with weather bureau-type wet and dry bulb thermometers. Pocket-sized psychrometer is perfect for student use, as it presents no mercury hazards.

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