Cobalt Blue Glass Cullet Chunk

This item is a large, irregularly shaped specimen of cobalt blue glass cullet, likely a byproduct or raw material from a high-quality glass manufacturing facility. The piece is characterized by its deep, saturated indigo and navy blue hues, which appear nearly black in thicker sections but reveal a vibrant cerulean translucency when light passes through the thinner edges. Physically, the object displays a distinct conchoidal fracture pattern across its surface, typical of amorphous solids like glass, resulting in sharp, curved ridges and smooth, shell-like indentations. Extensive surface abrasions, scuffs, and white impact marks are visible throughout, suggesting it was historically tossed into a pile or tumbled against other similar pieces. Some internal 'swirl' or 'seed' patterns are detectable within the matrix, indicating the flow of molten glass before it cooled into this solid mass. The texture is glass-smooth in some areas and gritty in others due to surface wear and possible calcification or environmental mineral deposits trapped in the crevices. There are no visible maker's marks or stamps, as is common with industrial raw glass. This piece likely dates from the mid-20th century to the present, serving as a decorative slag glass piece often found as garden accents, paperweights, or raw material for artisans. Its value is derived from the high purity of its cobalt coloration and its raw, sculptural form.

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