Eisco™ Raw Andesite, Igneous Rock Specimen - Approx. 3 Inch

Description

• Andesite features abundant phenocrysts in a fine grained matrix, and offers a great demonstration of igneous porphyry Ideal for identification and classification exercises
• Andesite is an excellent example of porphyry in igneous rocks
• The fine-grained felsic matrix contains larger, identifiable hornblende crystals, indicating two different rates of cooling Each specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY Each specimen sample is packaged in a transparent bag, and is labeled and barcoded for easy identification While each specimen will vary slightly in shape, size and color, it will measure approximately 3 inches in length.