Botryoidal Chalcedony with Captivating Orange and Purple Hues - Polished Agate Slab Displaying Unique Cracked Surface Texture - Height: 490 mm - Width: 335 mm- 18600 g - (1)






Holds a master’s in chemistry with 25 years’ experience in minerals consulting.
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A monumental polished Calcedonio botrioidale agate slab from Brazil, measuring 490 × 335 × 280 mm and weighing 18.6 kg, with orange and violet tones and a distinctive crackled surface texture.
Description from the seller
Imposing Yellow and Violet Agate slab, Brazil — This extraordinary specimen of Botryoidal Agate captures attention with its unique morphology and rich polychromy. The slab, meticulously polished on one side, reveals a breathtaking color pattern, with a predominance of vivid yellows and oranges blending harmoniously with delicate shades of violet and white. The surface exhibits a naturally cracked or honeycomb texture, the result of a fascinating geological process that gives it a distinctive and almost painterly appearance. Agate is a cryptocrystalline quartz variety, characterized by a fine-band structure and its capacity to assume a wide range of colors. Its formation typically occurs inside cavities of volcanic rocks, where silica-rich solutions slowly deposit, layer by layer, creating the characteristic concentric conformations or, as in this case, botryoidal forms. Botryoidal crystallization appears as a series of spherical masses or clusters, imparting the surface with a particular iridescence and depth. Brazilian provenance is renowned for the production of exceptionally high-quality and large agates. This specimen, due to its considerable size and striking aesthetics, represents a magnificent example of the natural beauty Brazil can offer. The combination of warm and cool colors, together with the surface texture, creates a visually impactful contrast, making it an ideal piece for discerning collectors or as a prestigious decorative element. An object of such magnificence not only enriches any mineral collection but also lends itself to becoming the focal point of a refined environment, from a private study to an elegant salon or a Wunderkammer. Its imposing presence and sculptural aesthetics make it a masterpiece of nature, capable of evoking wonder and admiration. Its natural imperfections and color variations are an integral part of its authenticity and geological history.
Seller's Story
Imposing Yellow and Violet Agate slab, Brazil — This extraordinary specimen of Botryoidal Agate captures attention with its unique morphology and rich polychromy. The slab, meticulously polished on one side, reveals a breathtaking color pattern, with a predominance of vivid yellows and oranges blending harmoniously with delicate shades of violet and white. The surface exhibits a naturally cracked or honeycomb texture, the result of a fascinating geological process that gives it a distinctive and almost painterly appearance. Agate is a cryptocrystalline quartz variety, characterized by a fine-band structure and its capacity to assume a wide range of colors. Its formation typically occurs inside cavities of volcanic rocks, where silica-rich solutions slowly deposit, layer by layer, creating the characteristic concentric conformations or, as in this case, botryoidal forms. Botryoidal crystallization appears as a series of spherical masses or clusters, imparting the surface with a particular iridescence and depth. Brazilian provenance is renowned for the production of exceptionally high-quality and large agates. This specimen, due to its considerable size and striking aesthetics, represents a magnificent example of the natural beauty Brazil can offer. The combination of warm and cool colors, together with the surface texture, creates a visually impactful contrast, making it an ideal piece for discerning collectors or as a prestigious decorative element. An object of such magnificence not only enriches any mineral collection but also lends itself to becoming the focal point of a refined environment, from a private study to an elegant salon or a Wunderkammer. Its imposing presence and sculptural aesthetics make it a masterpiece of nature, capable of evoking wonder and admiration. Its natural imperfections and color variations are an integral part of its authenticity and geological history.
Seller's Story
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It is believed that certain gemstones and minerals have beneficial health and spiritual properties. However, using or wearing gemstones or minerals does not mean that you can treat, cure or prevent any disease. Please consult your health care professional for information on health care issues and do not stop any medications or courses of treatment, without first consulting your health care professional. The use of gemstones or minerals as a wellness therapy is one of personal choice. While stones or crystals have been used historically to relieve or prevent symptoms, the objects sold on our website offer no guarantee of results. Therefore, Catawiki cannot guarantee or be held liable for the effectiveness of these objects sold herein.
It is believed that certain gemstones and minerals have beneficial health and spiritual properties. However, using or wearing gemstones or minerals does not mean that you can treat, cure or prevent any disease. Please consult your health care professional for information on health care issues and do not stop any medications or courses of treatment, without first consulting your health care professional. The use of gemstones or minerals as a wellness therapy is one of personal choice. While stones or crystals have been used historically to relieve or prevent symptoms, the objects sold on our website offer no guarantee of results. Therefore, Catawiki cannot guarantee or be held liable for the effectiveness of these objects sold herein.
