11. Lapis lazuli, a metamorphic rock considered a semi-precious stone because of its color
(By Hannes Grobe, Wikimedia Commons)
12. Variolite, an igneous volcanic rock commonly found in the form of round pebbles
(By Schaferpho, Wikimedia Commons)
13. Llanite, a subvolcanic rock known for its pattern, only found it Llano county, Texas
(Wikimedia Commons)
14. Jaspillite, a chemical rock also known as Jasper taconite, used as a gemstone
