"WardsSci000478"

Strong Enough for Heavy Stream Table Use

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

White, fine, massive, opaque to slightly translucent.

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

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Brownish gray, kerogen-rich; commercial oil source.

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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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Shiny crystal clusters and crystalline groups, this 'fools gold' is brassy and leaves a black streak.

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

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

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For drag style collecting.

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