Aura agate slices begin as natural agate, a banded form of microcrystalline quartz (SiO₂), and are treated with a thin metallic coating—often titanium or other vapor-deposited metals—to produce an iridescent, rainbow-like surface effect. While the color is enhanced, the underlying agate still displays its natural banding and internal structure.
Features:
- Composition: Silicon dioxide (agate) with a thin metallic coating for color enhancement.
- Appearance: Translucent agate with natural banding patterns, overlaid with a shimmering, iridescent surface.
- Formation: Agate forms in volcanic rock cavities through rhythmic deposition of silica-rich fluids. The aura finish is added via a vacuum deposition process that bonds metal ions to the surface.
- Physical Properties: Hard and durable (Mohs 6.5–7), with a smooth, polished surface.
- Educational Value: Highlights both natural mineral formation and applied surface treatment techniques used in materials science.
Aura agate slices are a visually striking blend of natural geology and modern material processing, making them both decorative and educational.
