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A W (Tony) Grover: south face of Mount Adams
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[ Jessica ]: Alpha/Beta quartz gravel from the Bandelier Tuff
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Ron Wolf: Gypsum var. Selenite
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Ron Wolf: Wulfenite
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Ron Wolf: Wulfenite
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Alan Cressler: Bosque Estatal de Quanica, Municipio de Guayanilla, Puerto Rico, Caribbean Sea, Marion O. Smith, and Brian Killingbeck 1
sjrankin: Antarctic Pressure Ridges (and Cloud)
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benno.dierauer: 🌴🌴🌊
James St. John: Resetting Evolution’s Clock? End-Cretaceous Extinction and the Origin of Modern Mammals
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[ Jessica ]: Chalcocite Iridescence
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Pejasar: Cloud tickling
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scttcarl: Under The Rim
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Ron Wolf: Pyrite on Quartz
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Pacific Crest Trail Association: Basking Snake
sjrankin: Transantarctic Mountains
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Beatrix MK: Golden Canyon
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A Lion: Fresh, hot, crunchy lava - Fagradalsfjall
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A Lion: The storm is coming
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scttcarl: Full Moon Tide
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ronmcbride66: A cloudy day in Connemara
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Joel Pee: Pyritized ammonites - Volga River Russia 160MYO
10b travelling (sorry: glitch, so resubmitting): Uyuni morning
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garshna: Valley of Fire State Park
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The^Bob: Transmission of thin sample of blue amber
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The^Bob: Perylene in in blue amber - term diagram
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ronmcbride66: The Erriff river near Leenane, Co. Galway
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jeandelalune: Sumidero Canyon
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ronmcbride66: A boardwalk in a peat bog, Mayo
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BioKnowlogy: Astronomy 056 - Fukang Meteorite
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The^Bob: Ozone in a rock