New Igneous Rocks – Volcanic Ash and Graphic Granite

We have two new igneous samples for you – graphic granite and volcanic ash. Check them out today. Both of these samples make great additions to your collection!

Graphic granite is a form of granite that consists of parallel, rod-shaped quartz crystals in a matrix of feldspar. The quartz grains have an appearance of written script characters when a sample is cut perpendicular to the quartz grains, which gave the rock its name. Get your sample today!

Volcanic is composed of clay to sand-sized particles of rock and volcanic glass. This material is expelled from a volcano during a violent eruption. Steam buildup in a volcano causes violent eruptions that shred the surrounding rock into small, ash particles. Get your sample today!

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