Agate /ˈæɡət/ is a rock consisting primarily of cryptocrystalline silica, chiefly chalcedony, alternating with microgranular quartz. It is characterized by its fineness of grain and variety of color. Although agates may be found in various kinds of host rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks. They start out as air bubbles inside a layer of volcanic rock. When rain hits the rock, the rock slowly releases chemicals into the small amount of water that soaks through them. Over millions of years, this water forms tiny crystals such as clear quartz or purple amethyst crystals. The process could also form bands or stripes seen in agate. Believe it or not, there’s no easy way to tell what’s inside of a geode until it’s cut open or broken apart.Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. There are many different varieties of quartz, several of which are semi-precious gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia.
We love that geodes offer rough, natural vibes and that no two are exactly alike in shape or color. From book ends to accessory décor, these organic geode decor ideas bring energy, creativity, and a sense of history to your home.
- The photos above are an example, yours may vary from rock size and or color shade
- Average Length 16in to 20in