| Is this partially devitrified obsidian? Is this replaced by cristobalite or perlite or rhyolite or Trachyte or what? | 2 | Minerals | | | | |
| Is this really Glossopteris? Seems kinda big for the normal thing, plus shape looks different. | 1 | fossils | | | | |
| What are these extremely shiny surfaces? | 1 | Minerals | | | | |
| Self-grown Copper Sulfate crystal! | 1 | Crystals | | | | |
| All views of mystery crystal | 1 | Minerals | | | | |
| It doesn't matter which part of the world you're from | 1 | antimeme | | | | |
| My precious | 1 | fossils | | | | |
| Tiny nautiloid? | 1 | fossils | | | | |
| I cannot get over how this piece of chipped wood bark looks so similar in shape to a fossil Megalodon tooth | 1 | Pareidolia | | | | |
| I present to you a very objective truth | 1 | antimeme | | | | |
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