Geological Specimens "Rocks in A Bag" Igneous Pk/6

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.

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

*samples may change from time to time