"Freeze-Dried Specimens"

Study the Formation of Different Igneous Rocks

Coarse grained and abundant in plagioclase feldspar.

Introduce your students to rocks formed from the cooling of magma and lava.

Includes: six each of obsidian, pumice, and basalt. Set of 18.

Common rocks and minerals for testing and identification studies are 2–3cm each.

Abundant small black phenocrysts in a gray to brown matrix.

Coarse-grained plagioclase and pyroxene with some olivine.

Classic, dark; from the Columbia Plateau.

Banded volcanic glass.

Sale