"Ward's Phenomena"

Anorthosite is an intrusive, igneous rock consisting of predominantly plagioclase feldspar.

Sale

Banded volcanic glass.

Obsidian is hard black colored, volcanic glass.

Samples of Intrusive and Extrusive Igneous Rocks

Porphyritic igneous rock containing biotite, feldspar, and hornblende.

Pegmatite is igneous rock similar to granite but with larger crystals.

Sale

Pumice is light colored glassy rock that floats in water.

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

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

Volcanic glass with snowflakes embedded throughout.

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