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Special Christmas deal! Get 68% off of a 2-year plan and get an 4 additional months free. Just go to https://nordvpn.org/thoughtemporium and use our coupon code thoughtemporium at checkout. __________________________________________________________________________ Opal is easily one of the most beautiful gem stones and surprisingly it is also quite easy to grow synthetically. Unlike other gems which are solid crystals, opal is made of silica nanoparticles which have to be stacked together in just the right way to produce their magnificent colors. By growing silica nanoparticles of the right size, synthetic opal can be grown that looks just as amazing as the real thing. Videos/channels I mentioned: Smartereveryday - https://www.youtube.com/watch?v=zHecdSDz4uU Nilered - https://www.youtube.com/watch?v=Y0HfmYBlF8g Applied science - https://www.youtube.com/user/bkraz333 Papers: Stober process - https://link.springer.com/content/pdf/10.1007%2Fs11051-016-3691-8.pdf Opal preparation - http://www.pinfire.de/opal-literature/Some-Aspects-of-Opal-Synthesis.pdf Supercritical opal drying - https://www.researchgate.net/publication/273286020_The_application_of_supercritical_drying_in_the_synthesis_of_silica-based_materials Opal images and info - www.synthetic-opals.com ____________________________________________________________________ Support the show and future projects: Patreon: https://www.patreon.com/thethoughtemporium Nebula: https://go.nebula.tv/thethoughtemporium Ko-Fi: https://ko-fi.com/thoughtemporium Become a member: https://www.youtube.com/channel/UCV5vCi3jPJdURZwAOO_FNfQ/join Store: https://thethoughtemporium.ca/ ______________________________________________________ Our Social Media Pages: Tiktok: https://www.tiktok.com/@thethoughtemporium Instagram: https://www.instagram.com/thethoughtemporium/ Facebook: https://www.facebook.com/thethoughtemporium/ Twitter: https://www.twitter.com/emporiumthought Website: http://thethoughtemporium.com/ _____________________________________________________