![]() The whole thing is 41×33 inches big and comes with a custom metal stand to display it.īuying both the stone and the stand currently costs $11,500. ![]() This geode is unique in that it has eight “viewing windows,” meaning eight different places that you can see inside the rock to the crystals beneath. The geode shines with its incredible violet amethyst formations, extracted from basalt deposits in Artigas in Uruguay, one of the world’s primary sources of amethyst. The Multi-Window Amethyst Geode on Metal Stand is a custom creation currently for sale on Fossilera. Multi-Window Amethyst Geode on Metal Stand These include onyx, citrine, and even amethyst. Though some of these variants are called simply the color and the quartz, such as red quartz, others are known as completely different stones. Depending on many geological factors like heat, depth, pressure, age, and surrounding minerals, quartz can form in many different types, qualities, and colors. Quartz cannot be considered a single gemstone only. One of the selling points of this geode is its large viewing cavity, showing an above-average amount of crystals inside. Hematitic inclusions are what scientifically give quartz crystals their red color, which is one of the rarest that can be found (behind amethyst). The final undisclosed sale price of this geode was between $60,000 and $80,000 Hong Kong dollars or $7,646.86-$10,195.81. It is one of the minerals that make up limestone.Ī Rare Red Quartz Geode measuring 24x22x17 cm was sold at the same Bonhams auction, held from November 1-14 in 2020. Other times, the calcite formations are so interesting that they give the geode its unique selling point, as in the case of this example.Ĭalcite is what is known as a polymorph of calcium carbonate. Often, calcite formations damage the purity of the base stone. Did you know?Ĭalcite is a common mineral deposit that forms in geodes alongside the primary mineral. This one went to an unknown bidder for HK$75,625, or the equivalent of USD 9,368.23. It also sold some of the other rare geodes on this list in the Hong Kong Admiralty. This geode was sold at a Bonhams auction called Mineral Treasures from a European Collector, which was held from November 1-14, 2020. They terminate in a crystal made of calcite jutting from the geode’s center into a stony point. The reason it looks amazing and sold for so much, however, is that it includes a mix of other minerals that grow in various formations and give it its unique colors. The base stone of this geode is an amethyst crystal formation.
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