Jasper is an opaque stone that comes in many colors, most commonly red, brown, yellow, or green, often with interesting patterns, swirls, or spots. Unlike transparent gems like diamonds or emeralds, you can't see through jasper at all. It's made mostly of quartz, one of the most common minerals on Earth, mixed with other materials that give it color and patterns.

People have used jasper for thousands of years to make jewelry, carved seals, decorative objects, and tools. Ancient Egyptians carved jasper into amulets and scarab beetles. In medieval times, people believed different colors of jasper had special powers, though we now know it's simply a beautiful and durable stone. Today, jewelers still use jasper in rings, necklaces, and bracelets because its earthy colors and unique patterns make each piece one of a kind.

The word jasper can also be a person's name. Because it's relatively inexpensive and easy to work with, jasper is a popular stone for beginning rock collectors and for anyone who enjoys the natural beauty of polished stones without the cost of precious gems.