Richard Gibson
@richardgibson.bsky.social
Geologist (gravity & magnetics, tectonics), mineral collector, old cycler in Butte, Montana USA. Author "What Things Are Made Of," "History of Earth Perpetual Calendar." ⚒️ #geology posts: https://richardigibson.substack.com . Equality for all, no MAGA.
#MineralMonday Gypsum and tridymite on clinker (rock metamorphosed by natural coal fires), Powder River Basin, Wyoming USA. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
November 24, 2025 at 4:01 PM
#MineralMonday Gypsum and tridymite on clinker (rock metamorphosed by natural coal fires), Powder River Basin, Wyoming USA. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
The gastropod here is obviously not in the feeding position, but I always liked to think it was just rotated for some reason. Maybe the whole relationship was just fortuitous... Token is about 40 mm.
November 23, 2025 at 3:34 AM
The gastropod here is obviously not in the feeding position, but I always liked to think it was just rotated for some reason. Maybe the whole relationship was just fortuitous... Token is about 40 mm.
The Soviet Union may have issued stamps every year for Geologists Day (first sunday in April)
November 15, 2025 at 1:24 AM
The Soviet Union may have issued stamps every year for Geologists Day (first sunday in April)
Non- #MineralMonday Man-made taconite pellets, compressed pulverized iron ore, collected at a mine in Upper #Michigan in 1967. The #EdmundFitzgerald had 26,000 tons more than this 50 years ago today. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
November 10, 2025 at 4:14 PM
Non- #MineralMonday Man-made taconite pellets, compressed pulverized iron ore, collected at a mine in Upper #Michigan in 1967. The #EdmundFitzgerald had 26,000 tons more than this 50 years ago today. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday #Copper pseudomorph after pseudohexagonal aragonite twin, Corocoro, Bolivia. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
November 3, 2025 at 3:25 PM
#MineralMonday #Copper pseudomorph after pseudohexagonal aragonite twin, Corocoro, Bolivia. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Youngite = brecciated agate and/or jasper + chalcedony. 4 x 4 cm. Fluorescent. Guernsey, Wyoming USA ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
October 20, 2025 at 4:03 PM
#MineralMonday Youngite = brecciated agate and/or jasper + chalcedony. 4 x 4 cm. Fluorescent. Guernsey, Wyoming USA ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Topaz, red with rutile inclusions. 7 x 6 cm. Tepetate, San Luis Potosi, Mexico ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
October 13, 2025 at 3:24 PM
#MineralMonday Topaz, red with rutile inclusions. 7 x 6 cm. Tepetate, San Luis Potosi, Mexico ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
Next time you're in Montana, go to the clay pit in the Greyson Shale (Belt) north of Cardwell. It's where Clays in Calico in Cardwell got their materials.
October 11, 2025 at 4:16 PM
Next time you're in Montana, go to the clay pit in the Greyson Shale (Belt) north of Cardwell. It's where Clays in Calico in Cardwell got their materials.
#MineralMonday Barite, Cerro Warihuyn, Miraflores, Huamalies Prov., Huanuco, Peru. 88 mm. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
October 6, 2025 at 2:44 PM
#MineralMonday Barite, Cerro Warihuyn, Miraflores, Huamalies Prov., Huanuco, Peru. 88 mm. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Calcite, Rensselaer, Indiana USA, 8 cm wide. The brown coating is from petroleum in the host rock. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
September 29, 2025 at 3:09 PM
#MineralMonday Calcite, Rensselaer, Indiana USA, 8 cm wide. The brown coating is from petroleum in the host rock. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday #Gold octahedron 0.8 mm, on quartz, Ouray Mining District, Colorado. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
September 22, 2025 at 2:51 PM
#MineralMonday #Gold octahedron 0.8 mm, on quartz, Ouray Mining District, Colorado. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Quartz pseudomorphs after anhydrite, Rio Grande do Sul, Brazil. Longest blade 10.5 cm, on quartz with green celadonite in basalt vug. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
September 15, 2025 at 3:09 PM
#MineralMonday Quartz pseudomorphs after anhydrite, Rio Grande do Sul, Brazil. Longest blade 10.5 cm, on quartz with green celadonite in basalt vug. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Calcite, butterfly/knee/heart twins, attrib to Frizington, Cumbria, England. Probably mined before 1910; some tiny hematite inclusions. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
September 8, 2025 at 3:49 PM
#MineralMonday Calcite, butterfly/knee/heart twins, attrib to Frizington, Cumbria, England. Probably mined before 1910; some tiny hematite inclusions. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Cristobalite “snowflakes” in obsidian, Arizona USA. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
September 1, 2025 at 3:09 PM
#MineralMonday Cristobalite “snowflakes” in obsidian, Arizona USA. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Malachite, Mud Springs Range, New Mexico USA. 1.5 mm. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
August 25, 2025 at 8:51 PM
#MineralMonday Malachite, Mud Springs Range, New Mexico USA. 1.5 mm. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Erythrite, Sonora, Mexico. Cobalt arsenate, Co3(AsO4)2 · 8H2O. Field of view approx. 1 cm. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
August 18, 2025 at 3:21 PM
#MineralMonday Erythrite, Sonora, Mexico. Cobalt arsenate, Co3(AsO4)2 · 8H2O. Field of view approx. 1 cm. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Smoky Quartz, Switzerland, approx. 2 cm. Unusual faces are probably trapezohedrons or steep rhombohedrons. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
August 11, 2025 at 4:40 PM
#MineralMonday Smoky Quartz, Switzerland, approx. 2 cm. Unusual faces are probably trapezohedrons or steep rhombohedrons. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Xocomecatlite (green), Trixie Mine, Utah USA. More here, with gold: richardigibson.substack.com/p/xocomecatl... ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
August 4, 2025 at 1:46 PM
#MineralMonday Xocomecatlite (green), Trixie Mine, Utah USA. More here, with gold: richardigibson.substack.com/p/xocomecatl... ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Uraninite, Spruce Pine, North Carolina USA, cube with malformed dodecahedrons, 1 cm.⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
July 28, 2025 at 2:06 PM
#MineralMonday Uraninite, Spruce Pine, North Carolina USA, cube with malformed dodecahedrons, 1 cm.⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Star muscovite (twins), 3 cm high. Jenipapo pegmatite, Itinga, Minas Gerais, Brazil. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
July 21, 2025 at 1:37 PM
#MineralMonday Star muscovite (twins), 3 cm high. Jenipapo pegmatite, Itinga, Minas Gerais, Brazil. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday For #Bastille Day, malachite pseudomorph after cuprite (octahedrons and dodecahedrons), Chessy, France, 13x10 mm ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
July 14, 2025 at 2:34 PM
#MineralMonday For #Bastille Day, malachite pseudomorph after cuprite (octahedrons and dodecahedrons), Chessy, France, 13x10 mm ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday Pyrite “sun,” Sparta, Illinois, 6 cm diameter. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
July 7, 2025 at 1:25 PM
#MineralMonday Pyrite “sun,” Sparta, Illinois, 6 cm diameter. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday a day late: measuring mostly magnetite in Montana by USGS. richardigibson.substack.com/p/new-aeroma... ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
July 1, 2025 at 6:44 PM
#MineralMonday a day late: measuring mostly magnetite in Montana by USGS. richardigibson.substack.com/p/new-aeroma... ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
#MineralMonday ferroan dolomite (we called these ankerite 50 years ago, but they aren’t really). Crystal group about 1 cm wide. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
June 23, 2025 at 5:42 PM
#MineralMonday ferroan dolomite (we called these ankerite 50 years ago, but they aren’t really). Crystal group about 1 cm wide. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience