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Dendritic agate is a whitish-gray or colorless chalcedony with tree- or fern-like markings known as dendrites. The dendrites in dendritic agate are iron or manganese inclusions, usually brown or black in color. Though they appear organic due to their fern-like structure, they are actually inorganic; they are formed at fine fracture surfaces through crystallization of weathered solutions of neighboring rock.

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An antique moss agate brooch, Fabergé, workmaster Michael Perchin, St. Petersburg, circa 1890. The hexagonal façade composed of three moss agate sections within rose-cut diamond borders, set with rubies and gems, 56 standard, length: 3.7cm.

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Fractal mineral space by Pascal Petit. Incredible colors! Igneous rocks formed from lava flows of the Archaean era (>2,700 million years ago) are often found to contain disequilibrium-textured crystals characterized by spherulitic, branching or dendritic morphologies that occur in layers near the flow surface.

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Dendritic Agate Natural Rough 485 Gr

Amethyst Sage Agate ... translucent lavender chalcedony is riddled with manganese dendritic inclusions

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Dendritic Agate for chronic illness, one of my crystal healing posters for a Rainbow Spirit crystal shop.

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Dendritic Agate Natural Rough 150 Gr