"Ward's® Thermochemistry In The Bag Inquiry Demonstration Activities"

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

Classic, dark; from the Columbia Plateau.

Nearly pure, green crystalline forsterite.

Pure, white, earthy “China clay”.

Grayish black trap rock.

Gray with line crinoid columnal fragments.

Pure, bright yellow, Frasch sulfur.

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

Dense and massive.

Buff, coarse, crystalline “Austin Marble” with shell casts and molds.

Great example of plant cells and mitosis.

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

Light gray, fine small clasts.

Abundant small black phenocrysts in a gray to brown matrix.

Pure, large, transparent-to-translucent cleavages, Mohs’ hardness of 4.

Flexible multi-tube rack.