Approximately 1"

Hyalite is like the secret agent of the mineral world. Under normal circumstances, it blends in and is unremarkable, but under UV light, it transforms into something amazing. The glowing green you see here in the image is what happens when a UV light is introduced and its carefully woven disguise is pulled away. Not only is it hiding its radiant green aura from the world, but its own identity as well. You wouldn’t think it’s a form of opal, but it absolutely is. It’s pretty easy to see why we love it so much. It’s just layer upon layer of secrets. Ok, so it’s sneaky, but what’s really happening here?

Some other minerals react under UV light, but nothing is as bombastic as hyalite. It contains trace amounts of uranium (don’t worry, it’s safe) that react to UV light. When hit with UV light, the uranium atoms absorb that high-energy light. Their electrons get “excited” to a higher energy level, and when they fall back down, they release energy as visible light, usually a bright neon green glow. In simplified terms, uranium glows under UV because it absorbs invisible light and re-emits it as visible green light.

If you’re looking for an unassuming, undercover mineral, hyalite is the agent for you.

According to metaphysics, hyalite opal is often associated with clarity, truth, and emotional expression. Because of its clear, glass-like appearance, it’s believed to help bring hidden thoughts and feelings to the surface, making it easier to understand and communicate them. Many people use it for amplifying energy and intentions, similar to other forms of quartz and opal, and it’s thought to enhance focus during meditation.