Large Agate slice from Brazil, black base

This large 43 cm high agate slice comes from Brazil. It fascinates with its delicate and almost transparent shades, highlighted in black, passing by touches of blue.
Its crystallized heart makes this piece unique. This phenomenon is explained by the fact that some cavities in the center of the agates do not fill completely with silica during their formation. Over time, quartz crystals form inside these empty spaces, adding a sparkling texture and striking contrast to the concentric bands of the stone.
Light and elegant, this slice mounted on a black base reveals another facet of its beauty when the light crosses it. It then takes golden tones and awakens the details of its construction made of nodules, all in 3 millimeters thick... fascinating.