"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.

Vente

Brownish gray, kerogen-rich; commercial oil source.

Unpolished metamorphic rock with silky lusture, red-brown colour, and clear parallel intergrown quartz crystals.

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

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Pure, bright yellow, Frasch sulfur.

Ward's® highest quality and purest mineral offerings.

For drag style collecting.

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

Feldspar group; white-to-gray cleavages of sodic plagioclase; some show twinning.

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

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