"WardsSci000478"

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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For drag style collecting.

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Compact, 2-in-1 field tool and weather instrument.

Pure, bright yellow, Frasch sulfur.

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Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.

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Pure translucent to white, rhombic cleavages, Mohs’ hardness of 3.

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Withstands the strongest brush.

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Clear, euhedral points and sections.

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1 pound of black sand packaged in a heat-sealed bag.