Red-blue agate with amethyst

A red and blue agate with amethyst from Uruguay. The banding runs in a sharply alternating geometry between red and blue, with the violet main quartz phase filling the geode's center.

Agate is a banded variety of chalcedony. The red and blue color combination in one piece documents changing trace element concentrations during the geode's formation.

Iron oxides color it red. The blue coloring results from a distinct mineral component within the microcrystalline structure. The amethyst content as the core phase documents a later mineralization episode.

The combination of red, blue, and violet in one geode is a deposit-related premium rarity. The Uruguayan agate deposits supply premium material in this block size.

A Uruguayan collector's item of architectural gallery dimension with a three-color combination and premium material classification, suitable for reception areas or lofts.