chalcedony in ball-like nodule

The nodular chalcedony presented here in the form of irregular spheres or balls is a variety of quartz. This particular structure results from the accumulation of successive layers of chalcedony around crystallization centers, giving the appearance of small balls adhering to each other. This gray, sometimes translucent model reveals a granular texture and darker mineral inclusions. Valued since antiquity for the manufacture of small ornamental objects and tools, chalcedony was widely used in various civilizations. Deposits of this stone are common in volcanic areas, where silica is abundant, making this mineral accessible in many regions of the world.

This item measures approximately 4 cm.