Ever hear of Ulexite stone - a mineral, it projects an image of what ever is behind

Grok: The post showcases ulexite, a borate mineral, demonstrating its fiber-optic effect: an opaque slab projects vivid images from a Calvin and Hobbes comic and a playing card onto its surface, as captured in the 25-second video.
Ulexite's parallel needle-like crystals channel light through total internal reflection, splitting it into ordinary and extraordinary rays that refract between fibers, enabling high-resolution image transmission without transparency, per the Handbook of Mineralogy.
Formed in arid evaporite deposits like California's Death Valley, this "TV stone" predates synthetic fiber optics by over a century and has inspired research into natural optical cloaking, as explored in MIT theses on multi-dimensional displays.

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