These geodes have beautiful crystal color and quality and come straight from the mines, allowing us to offer the best prices. These geodes are in the ballpark of 4 feet plus and weigh upwards of 100 pounds. If you are looking to buy a massive display piece to blow your friend’s minds, we have a few huge amethyst geodes from Uruguay and Brazil. If you are interested in owning a geode they come in a variety of sizes and price points and are more attainable than ever from FossilEra. There are many different varieties of geode but some of our most popular specimens are the aforementioned amethyst geodes, sparkly clear quartz geodes from Morocco, brown calcite and clear quartz keokuk geodes from Illinois, Iowa, and Missouri, and massive celestine geodes with sky-blue crystals from Madagascar. Our stunning South American amethyst geodes often sport calcite crystal associations or glinting orange goethite inclusions in the terminations of the amethyst. Typically, geodes are lined with quartz crystals (or any of the quartz varieties) but may have other mineral associations depending on the content of the leached fluids as the geode formed. These fascinating formations are the product of empty cavities within rock filling with a silica rich solution and then solidifying along the walls over a long stretch of time. Stunning Geodes - One of the coolest natural occurrences are geodes. Scalenohedral beam calcite from Morocco and Illinois are quite popular for their large size and opposing sherp terminations cave calcite from Peru offers branching shapes and bright coloring and manganocalcite fluoresces a hot pink under shortwave UV light. With recent acquisitions of phenomenal pagoda, hematite-included beveled-edge, and funky cave calcite from China, we have expanded our rich calcite inventory to include even more awesome specimens. Its organic content means there is a high probability that it will fluoresce under UV lighting. A white, yellow, or orange calcium-carbonate mineral and pseudomorph of aragonite, calcite appears just about everywhere, often as a fun bonus association in geodes or as gnarly stalactites. However, we should be grateful that calcite grows everywhere and in so many different forms with so much variety and availability, calcite makes for an affordable and fascinating addition to any collection. In fact most geologic material is made up of super-fine crystals, however, when we think of a stunning quartz scepter or a fist-size aquamarine, “macro”-growth crystals are what we are imagining.Ĭalcite - Because of its tendency to form just about anywhere moist and full of limestone, calcite is often overlooked as a collector-quality mineral. Looser patterns create amorphous minerals, whereas rigid structures (known as a crystalline lattice) dictate all of the multitudinous shapes that crystals appear in. That's all well and good but what does it mean? Essentially, each mineral is made up of similar components that follow a set pattern that gives the mineral its shape and solidity. Minerals are defined as inorganic solids that are composed of ordered molecules in a repeating pattern. Nature does all of the work and we get to reap the rewards. Mineral Specimens - Mineral specimens are one of the most awe-inspiring and interesting collectables on the market. If you have any questions feel free to reach out to one of our knowledgeable customer support staff via email at or on the phone at (866) 550-2013 (weekdays 7:00am to 4:00pm PST). New mineral specimens are available for purchase on an almost daily basis, so be sure to check out for new listings frequently, or set up a customizable email alert if you would like to be notified when that perfect piece has arrived! Most orders are shipped within 1-2 business days and we provide a 30 day, no questions asked, money back guarantee on all purchases. We take great pride in offering a large selection of high quality mineral specimens and crystals for sale from around the world, that are accurately described and photographed, and at excellent prices. Over 14,000 reviews provided by Ekomi, an independent review collecting service, shows that our customers have given us an average 4.9 out of 5 star satisfaction rating. In our first eight years in business selling fossils, crystals and fine mineral specimens we have shipped over 150,000 orders around the globe.
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