A geode (/ ˈ dʒ iː. oʊ d /; from Ancient Greek γεώδης (geṓdēs) 'earthlike') is a geological secondary formation within sedimentary and volcanic rocks. Geodes are hollow, vaguely spherical rocks, in which masses of mineral matter (which may include crystals) are secluded.

2024年1月12日 · Use our guide to easily identify if a rock is a geode. It's very easy to walk past an unopened geode without realizing it unless you know what to look for.

2021年4月27日 · A geode is a hollow rock containing minerals or crystals deposited by mineral-rich water. The word “geode” comes from the Greek word for “Earth-like.” Here is a look at how geodes form, colors and types of crystals they contain, how to find geodes, how to crack them open, and how to make them yourself. How Geodes Form

2024年5月2日 · Geodes are geological formations characterized by their spherical shapes and hollow interiors, often lined with colorful crystals. Derived from the Greek word geoides, which means "earthlike," these unique structures catch the eye of scientists and gem enthusiasts alike.

Geodes are spherical rock structures with an internal cavity that is often lined with quartz crystals and banded agate. Some are lined with more mundane or spectacular materials.

2024年1月15日 · At first glance, a geode seems like a plain, round, and ordinary rock. But once you crack it open, you’ll discover a treasure trove of sparkling crystals inside! It starts as bubbles in volcanic rock or as animal burrows, tree roots, or mud balls in sedimentary rock.

Geode, hollow mineral body found in limestones and some shales. The common form is a slightly flattened globe ranging in diameter from 2.5 to more than 30 cm (1 to 12 inches) and containing a chalcedony layer surrounding an inner lining of crystals.