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, and make mineral identification simple. Granite is a classic igneous rock, and is a must-have sample when discussing rock types, the rock cycle, and the formation, classification, and identification of igneous rocks. This sample is also available in packs of 12.
Features
- Porphyritic granite sample approximately 1″ (3cm) in size
- Large crystals in a variety of shapes and colors make this felsic plutonic rock ideal for lessons in mineral identification and bulk rock chemistry
- Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements
- Great for comparing cooling rates between samples with differently-sized crystals
- Specimen comes in clear labeled and barcoded bag for ideal storage
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