For every 150,000 diamonds, only 1 red beryl gemstone is found. Setting the Stage Rhyolite is an extrusive igneous rock while its cousin, granite, is an intrusive igneous rock. Extrusive: magma that breaches Earth’s surface, becoming lava.
Intrusive: magma that fails to breach Earth’s surface.
Igneous: rocks that result from magma or lava cooling…
