There would be no bright and colorful fireworks without rocks and minerals. A firework is produced by launching a shell containing fuel and a color mix high into the air, where it explodes.

Minerals are typically formed when molten rock, or magma, cools ... comprised of aluminum oxide. The red color is caused by traces of chromium. Corundum also forms sapphire in many colors ...

The most colorful of all may just be rainbow obsidian, which features an array of iridescent colors, including shades of green, purple, and blue. Colorful, sure, but we’d say it reminds us more ...