medium-sized clear rock crystal sphere from Brazil with yellow inclusion

A medium-sized clear rock crystal sphere from Brazil, with a striking yellow inclusion inside. The inclusion appears like a frozen sun within the transparent quartz volume.

Rock crystal is the purest variety of quartz (SiO₂). Yellow inclusions can have various mineralogical origins: fine limonite particles, densely arranged rutile needles, or an enclosed citrine phase from iron-containing solutions during crystallization.

Precise identification requires microscopic analysis. What is visible in the piece: a yellow light carrier in the clear quartz background, an optical effect that only comes into its own with very clear raw blocks.

Brazilian deposits in Minas Gerais regularly supply quartz spheres with defined inclusion structures in collector quality.

A collector's item with gemologically valuable internal optics and an 18 cm display cabinet size.