Ever wonder how a Geode forms? Geodes are rocks that are plain on the outside but can have beautiful crystals on the inside. In the Greek language, geode means shape of the earth, and geodes are round like earth or oblong like an egg. They can be a couple inches or several feet in size. Geodes are created in the hollow areas of soil such as animal burrows or tree roots. They are also formed in the bubbles in volcanic rock. Over time, dissolved minerals seep into a hollow area and harden into an outer shell creating the geode. The minerals continue to form on the inside walls of the shell, growing towards the center. The most common dissolved mineral is quartz, but amethyst and other minerals are also found. It can take hundreds of millions of years for the space inside a geode to be filled, and many geodes remain partly hollow. A geode which is completely filled with crystals is called a nodule. Agate-filled nodules are called thunder eggs. We have a large selection of different types of geodes available at the store including the very popular Crack Your Own Geodes! Visit us today! Jacobs Trading - Ye Old Rock Shop 630 Park Ave Beausejour, MB ph 204-268-1856 JacobsTrading.ca
Posted on: Fri, 05 Sep 2014 18:12:48 +0000
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