The Igneous Rock Bag is an economy collection of 6 commonly known igneous rocks. Igneous rocks are formed by the cooling of molten rock, either magma or lava. Each generous specimen is 11/4" to 1 1/2" and is contained in a zip lock bag with a label. IGNEOUS ROCKS PUMICE - DARK VOLCANIC APPEARANCE, VESICULAR ROUGH TEXTURE OBSIDIAN - BLACK, GLASSY RHYOLITE - LIGHT COLOURED, POSSIBLE BANDING BASALT - DARK COLOURED, FINE GRAINED GABBRO – DARK COLOURED, LARGE, EVIDENT CRYSTALS GRANITE – SMALL, EVEN SIZED SPECKLES OF LIGHT AND DARK
Brand : American Educational Products
