This 3.95 ct rainbow garnet from San Pedro Mountain measures 12mm x 6mm x 3mm and features a bold, angular freeform shape with excellent polish and crisp edge lines. What makes this piece especially captivating is its rich banded diffraction, with vibrant blue, green, yellow, and magenta tones stacked like spectral brushstrokes across the central face.

While the iridescence is slightly faded on the terminal edges, the core of the stone reveals a powerful window into the lamellar structure, showcasing how light bends and reflects across the micro-layered growth planes of this rare optical phenomenon.

It’s a beautiful specimen that balances gem aesthetic and natural science—a collector's stone with both character and color play.