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

Gray, fine-grained, massive contact rock.

White, very dark green, and very dark red to light red granoblastic intergrowth of wollastonite, diopside, and andradite.

Coarse-grained plagioclase and pyroxene with some olivine.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Shows porphyritic texture in a fine dark matrix abundant large feldspar phenocrysts. Hand specimen.

When minerals, rocks, and fossils cannot be accurately identified by macroscopic observation and testing, thin section slides can reveal the composition and structure of the specimens on a microscopic level.

Classic, very coarse-grained igneous texture.

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

Pink/gray coarse carbonate rock.

Coarse-grained, with microcline, biotite and horblende phenocrysts.