Granite vs. Rhyolite: Cooling Differences

The same molten rock can create two totally different stones. It all comes down

to where it cools. Deep inside the Earth, hot magma chills out super slowly.

This gives minerals tons of time to grow into big, visible crystals, creating rocks like

granite where you can see all the sparkly bits. But if that same magma erupts as

lava onto the surface, it cools in a flash. There's no time for big crystals to form,

so you get a rock with tiny, microscopic grains, like rhyolite. So,

granite is the slow-cooked version, and rhyolite is its flash-frozen twin.