![]() (Think about that - several percent gas by weight!) When these magmas ascend to the surface, the gas expands in proportion to the pressure reduction. They can be several percent dissolved gas on the basis of weight. Where does all of the gas come from? Some magmas contain a lot of dissolved gas. Some voids are spaces occupied by gases that failed to escape the lava flow before its surface crusted over. Voids in basaltic lava flows often are infilled with agate, quartz, opal and other material delivered by hydrothermal water or groundwater. The most widely known and sought-after geodes are those that formed in areas of volcanic activity. Image copyright iStockphoto / WojciechMT. Each colored band represents an episode of agate formation and a change in the composition of the groundwater that delivered mineral material into the geode. The Story in the Rock: A spectacular sawn and polished geode specimen with multiple layers of colorful agate and a crystal-filled central cavity. There is something special about a beautiful treasure hiding in a rock that looks absolutely ordinary from the outside. When geode-opening demonstrations are given at rock and mineral shows, they always draw a crowd - and that crowd usually produces enthusiastic cheers and gasps when a nice geode is opened. Geodes sell rapidly at gem and mineral shows, science museums, rock shops, art galleries and shops that feature international or natural gifts. Brazil, Uruguay, Mexico, and Namibia are four examples of countries where geodes have become a local industry. In several parts of the world, geode localities have spawned profitable industries that collect them, prepare them for market, and ship them to destinations where they are purchased as items of science, natural art and enjoyment. They love tiny geodes as jewelry, sawn and polished geodes as bookends, and spectacular amethyst geodes as items of home or office decor. Broken open, or sawn and polished, people who have never taken a geology course buy thousands of tons of geodes each year. They are delighted and amazed that an uninteresting rock can contain a beautiful cluster of gemmy crystals, or a colorful lining of banded agate, or both of those in the same cavity. However, the general public has a love affair with them. Please include the order number and item(s) you wish to return.Most geologists enjoy geodes. Please allow 1-2 weeks for your return to be processed.įor all exchange or store credit inquires email request an authorization. We are unable to issue a credit without actual receipt of the item(s) or proof of received return delivery. We cannot be held responsible for items damaged or lost in shipment or return shipment, therefore we recommend an insured and trackable mail service. Return shipment costs are the responsibility of the buyer.Returned goods must be delivered to us unused, in original packaging with tags attaches and in perfect, sellable condition or may not be eligible for an exchange or store credit. Sorry, we do not offer price adjustments on Sales. All items marked "SALE" and/or "DISCOUNTED" items are final sale. Online returns must be delivered to us within 10 days of the date you received the item(s). In-store returns must be delivered to us within 7 days of the date you received the item(s), Pre-sale orders must be amended within 7 days of the date of purchase for store credit or exchange only. Geodes are often used for protection and growth.ĭon't love it? You may return it to us for exchange or a store credit less any shipping charges. Geodes are rocks that are plain on the outside but can have beautiful crystals on the inside. ![]() Over thousands of years, crystals form inside to create an amazing sparkley surprise center. Geodes start their life as a hollow bubble inside a layer of rock. They are associate with chakra alignment and self consciousness. Crystals are believed to bring balance and renew energies of a place and the living beings around it. They look amazing as natural home decoration and keep books align and straight on shelves bringing harmony to the room. The backs are the natural unpolished, raw stone.Ī lot of work goes into making these handmade bookends. Geodes are ancient rocks formed from gas bubbles on past volcanic eruptions or by the dissolution of sedimentary concretions like quicksand over million of years and are known to carry great power within them.Įach one is hand selected for it's natural beauty from rough material, hand cut in halves, with polished fronts. These are beautiful handmade geode bookends! Each bookend is cut, and polished by hand in Brazil from a Moroccan Geode Half.
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