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Cake day: July 4th, 2023

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  • neptune@dmv.socialtoScience Memes@mander.xyz⌛⌛
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    7 months ago

    Good example. Obsidian is apparently 70% silica. Iron is apparently what makes it black in color. If it’s thin enough, it is translucent.

    If you cool pure silica slowly enough, with impurities to cause seeding, you will get tons of crystals, not a single glass, that won’t be transparent.