Displays extrusive
Intrusive rocks
Rock size approx.: 1.5 x 1.5 in. 3.8 x 3.8cm
Geology Kit, Igneous Rock Collection; 15 specimens includes extrusive and intrusive rocks. Commonly used textbook terms are explained in an accompanying guide; Each specimen measures approximately 1 1/2 x 1 1/2 in. 3.8 x 3.8cm.
