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306 of #365Minerals 🧪⚒️

Leadhillite:
- A carbonate mineral
- Has a high density since it contains lead (~2.5 times more dense than quartz)
- Can be yellow, blue or green
- Forms in the oxidised zone of lead deposits
- Named after Leadhills in Scotland, its type locality #minerals #MineralMonday
Translucent, pale yellow and green leadhillite crystals with some bright blue caledonite on matrix. From Leadhills, Lanarkshire, Scotland, UK. Specimen on display in the Natural History Museum, London.
November 3, 2025 at 12:37 PM
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nadwgab.bsky.social
307 of #365Minerals 🧪⚒️

Hummerite:
- A potassium magnesium vanadate mineral
- Forms via the leaching of vanadium oxide ores
- Named after its type locality Hummer Mine in Paradox Valley, Colorado, USA #minerals #MineralMonday
Orange veins of hummerite, resembling lichen, in grey clay. From Hummer, Colorado, USA. Specimen on display in the Natural History Museum, London.
November 3, 2025 at 12:51 PM