Massive Blue Mineral Specimen (Possible Sapphire or Corundum-bearing Rock)

This item is a large, rough specimen of a mineral, most likely a form of massive sapphire or a sapphire-bearing rock given its distinct blue-lavender coloration and context as a 'mineral'. It exhibits an irregular, unpolished or un-tumbled form, indicative of a natural, raw state. The dominant color is a mottled blue-grey to light purple, with significant white to off-white inclusions and patches throughout its surface, suggesting the presence of other minerals or host rock. There are also visible areas of darker speckles and what appears to be metallic or pyritic inclusions, particularly concentrated in some of the recesses and along natural fracture lines, which show a yellowish-brown to brassy hue. The surface texture is notably rugged and uneven, with various natural fissures, crevices, and crystalline faces. Its size is substantial, appearing to be at least a foot in its longest dimension, resting on a table, implying a considerable weight. The light reflections suggest a somewhat dull to sub-vitreous luster on its naturally broken surfaces. There are no clear signs of human-made modifications such as cuts, polishing, or drill holes, indicating it is an untouched geological sample. No discernible maker's marks, signatures, or stamps are visible. The overall condition appears to be natural and stable, with no visible recent damage or repairs, only the inherent characteristics of a rough mineral specimen. Its estimated age is geological, given its natural formation.