Igneous Rock Collection (15 samples)

Contains 15 Igenous rock samples.  Igneous rock (derived from the Latin word ignis meaning fire) is one of the three main rock types, the others being sedimentary and metamorphic rock. Igneous rock is formed through the cooling and solidification of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from partial melts of pre-existing rocks in either a planet's mantle or crust  For more information on igneous rocks, click here.  Samples are a little larger than 50c coin sized.

Contains:

1. Biotite Granite

2. Granite

3. Syenite

4. Diorite

5. Gabbro

6. Anorthosite

7. Hornblende Basalt Porhphry

8. Trachyte Porphyry

9. Felsite

10. Andesite

11. Basalt

12. Obsidian

13. Pitchstone

14. Pumice

15. Scoria