Porphyritic Granite Specimen, Pack of 12

Details

Porphyritic Granite Specimen Set - A must-have sample for geology classrooms, this set of 12 specimens is ideal for group study and examination when discussing rock types, the rock cycle, and the formation, classification, and identification of igneous rocks. Granite forms slowly in shallow or evolved magma chambers and is also commonly found as magmatic intrusions in the crust. The large crystals are indicative of a slow cooling rate, making mineral identification simple. Each specimen measures approximately 1" in length and is individually packaged, labeled, and barcoded for easy identification and storage. Our specimens are selected and hand-processed by an actual geologist to ensure each sample exhibits defining features. Sourced from a variety of locations worldwide, our rocks and minerals are processed in Victor, NY.