Mountain Hollow Crystals
Laguna Agate #18
36.4mm x 24.5mm
Considered a rare variety, Laguna’s are one of the most sought after agates in the world. They can be found in a remote mountainous area in Chihuahua, Mexico and are known for their array of colors and tight banding. Some specimens have been known to have over 100 bands per square inch!
Some of these bands produce a parallax effect, or shadowing, depending on how they form within the Agate itself. “When a banded agate forms with close alternating opaque and transparent bands, the light entering the agate can cast an observable shadow from one opaque band onto the next. As the parallel bands change their perceived angle, the appearance of movement and perception of depth occur.”*
The most important things to remember, in my opinion, when shopping for a collector quality specimen: Look for color, tight banding, and preferably #1 variety- meaning they contain a full and complete pattern. (similar to gemstone quality ratings).
*courtesy of Pat McMahan/agateswithinclusions.com - this has been the best description I’ve come across to date