Polished Blue Agate Dish

This is a polished agate specimen, a variety of chalcedony quartz characterized by its distinctive banded layers formed over millions of years.

The specimen shows typical banding patterns in shades of blue-gray with a white crystalline center, likely formed in volcanic rock cavities where silica-rich solutions deposited minerals in layers.

Agate specimens are highly valued by mineral collectors, lapidaries, and crystal enthusiasts for their natural beauty and unique patterns. The polished surface enhances the stone's natural banding and translucency, making it appealing for both display and believed metaphysical properties. Collectors particularly appreciate specimens with clear banding, good color contrast, and interesting formations like the geode-like crystalline center visible in this piece.

Likely Brazil, India, or Madagascar

Geologically ancient, commercially polished within the last 50 years