Description
Exceptional 464g A-Grade Kambaba Jasper Sphere
This 464g A-Grade Kambaba Jasper Sphere from Madagascar is a beautifully polished mineral specimen with rich green tones and distinctive orbicular patterns. The photographs show the actual crystal you will receive, allowing you to appreciate its unique colouration, markings, and finish before purchase. A 1cm scale cube is included to provide accurate size reference. Like all of our specimens, this sphere comes with a Certificate of Authenticity, confirming it is a 100% genuine natural crystal. Carefully selected for quality, pattern clarity, and polish, this sphere is ideal for collectors, display, or anyone who appreciates the beauty of natural geological materials.
Geological History and Ancient Biological Origins
Kambaba Jasper is an extraordinary stone formed from fossilised stromatolites, some of the oldest known biological structures on Earth. These layered colonies were created by cyanobacteria—microorganisms that thrived in shallow marine environments billions of years ago. Their activity left behind distinctive circular and banded formations, which over great spans of time became preserved within mineral-rich sediments in what is now Madagascar.
As these ancient microbial mats fossilised, silica-rich groundwater gradually replaced the organic material with chalcedony and microcrystalline quartz. This process captured the flowing swirls and rounded cellular patterns that define Kambaba Jasper today. Madagascar’s ancient sedimentary regions, shaped by shifting seas, volcanic activity, and tectonic uplift, provided the ideal conditions for these stromatolitic structures to form and mineralise. The result is a stone that carries both geological and biological significance, offering a window into Earth’s deep past.
Mineral Composition and Crystal Structure
Kambaba Jasper is a variety of chalcedony, a microcrystalline form of quartz known for its compact structure and fine texture. The quartz microcrystals interlock to form a dense, durable matrix capable of achieving an exceptional polish, which is clearly evident on this 464g sphere. The natural colours range from deep mossy greens to darker, almost black regions, creating organic contrasts across the stone’s surface.
The orbicular or swirling patterns—often appearing as rounded “cells” or concentric circles—are the hallmark of the fossilised stromatolite formations within the jasper. These patterns give each sphere its individual character and are fully natural, with no treatments or enhancements. The polished spherical shape reveals the full complexity of these markings, allowing the viewer to follow the patterns seamlessly from any angle.
Madagascar Locality and Geological Significance
Madagascar is a renowned source of high-quality jasper and chalcedony, producing some of the most visually striking ornamental stones in the world. The specific regions where Kambaba Jasper forms are characterised by ancient geological formations that date back billions of years. These environments once supported extensive microbial colonies, which later mineralised into the distinctive orbicular stone prized by collectors today.
The craftsmanship associated with Madagascan lapidary work ensures that spheres such as this 464g specimen display their natural beauty to the highest standard. The deep colour saturation and well-defined patterning seen in this piece are signature features of Madagascan Kambaba Jasper.
Display Qualities and Collecting Value
Weighing 464g, this sphere offers a substantial yet manageable size ideal for display. The smooth polish enhances its colour depth, while the sphere shape highlights the continuous flow of patterns, making it a captivating piece from every viewing angle. Whether placed on a stand, shelf, or as part of a mineral collection, it brings both visual appeal and geological fascination to any space.
Collectors value Kambaba Jasper spheres not only for their aesthetics but also for their scientific significance as fossil-rich minerals. This A-Grade sphere has been chosen for its clarity of pattern, attractive colour balance, and quality of finish, making it a standout addition to any collection.
All of our Crystals are 100% Genuine Specimens & come with a Certificate of Authenticity.
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