very clear rock crystal sphere from Madagascar with beautiful shimmering inclusions

A very clear rock crystal sphere from Madagascar, with fine shimmering internal inclusions that appear as shifting reflective points as the light changes. 16 cm diameter with gemmological clarity.

Rock crystal is the purest variety of quartz (SiO₂). The shimmering inclusions can have various origins: micro-cavities with fluid inclusions, growth discontinuities, or fine accompanying mineral particles.

As the sphere is rotated, the reflective points shift, a dynamic phenomenon classified in the collector's trade as internal scintillation. Larger inclusion structures enable this optical effect.

Madagascar supplies quartz of outstanding clarity from the pegmatite deposits of the Vakinankaratra region. The combination of clarity with defined internal inclusions is relevant for collectors.

A collector's item with gemmologically valuable internal dynamics.