John Faithfull ππͺπΊπ΄σ §σ ’σ ³σ £σ ΄σ Ώπ§‘βπ»βπΏ#MinCup25 Today is #leucite vs #carpathite. Leucite is nice - readily forms lovely 24-faced icosatetrahedral crystals looking like white garnets. And only found in insanely K-rich and Si-poor igneous rocks - eg Vesuvius. However, it's got to be carpathite for me. A rare + astounding crystalline organic material formed from hot waters. It forms lovely crystals, has a sparkly high refractive index + fluoresces fabulously under UV light. A miracle of nature! #Geology #Mineralogy #Coronene
Bob McMeekingNot to mention the amazing jumping crystals. There are even some videos if you access the paper
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