SciShow is supported by Brilliant.org. Go to Brilliant.org/SciShow to get 20% off of an annual Premium subscription. Rocks or mineral crystals can often remind us of other things in our daily lives, but coming across some of THESE rocks might be one of the creepiest experiences a rockhound can have! Hosted by: Hank Green SciShow is on TikTok! Check us out at www.tiktok.com/@scishow ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Bryan Cloer, Chris Peters, Matt Curls, Kevin Bealer, Jeffrey Mckishen, Jacob, Christopher R Boucher, Nazara, charles george, Christoph Schwanke, Ash, Silas Emrys, Eric Jensen, Adam Brainard, Piya Shedden, Alex Hackman, James Knight, GrowingViolet, Sam Lutfi, Alisa Sherbow, Jason A Saslow, Dr. Melvin Sanicas, Melida Williams, Tom Mosner ---------- Looking for SciShow elsewhere on the internet? SciShow Tangents Podcast: www.scishowtangents.org Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Instagram: instagram.com/thescishow ---------- Sources: spookygeology.com/eye-agate-the-rock-that-looks-back-at-you/ ieeexplore.ieee.org/abstract/document/6213238 gem-a.com/gem-hub/gem-knowledge/optical-chatoyancy-cats-eye-gemstones-sillimanite www.sciencedirect.com/topics/earth-and-planetary-sciences/vesicle www.sciencedirect.com/science/article/abs/pii/S0009281912000670 www.mdpi.com/2075-163X/10/11/1037 Images: commons.wikimedia.org/wiki/File:Agate-Quartz-49959.jpg commons.wikimedia.org/wiki/File:Desert_flower.jpg commons.wikimedia.org/wiki/File:Cymophane.jpg commons.wikimedia.org/wiki/File:Eyeballed_by_all_the_eye_agates_(27395607964).jpg commons.wikimedia.org/wiki/File:Agate-_%26_quartz-lined_geode_5_(32375570960).jpg commons.wikimedia.org/wiki/File:Agate_nodule_(%22Lake_Superior_Agate%22)_(Jo_Daviess_County,_Illinois,_USA)_14_(34743267776).jpg www.istockphoto.com/photo/waves-in-light-agate-structure-gm509407138-85755831 www.flickr.com/photos/jsjgeology/16128028613

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