Dark green crystals of the very rare mineral fernandinite associated to yellow crystals of the also rare pintadoite. Both are vanadium minerals and have only been found in a few localities worldwide. From: Slick Rock District, San Miguel County, Colorado, United States of America. — Photo: David Hospital · CC BY-SA 4.0
Pintadoite
Pintadoite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Ca₂V⁵⁺₂O₇·9H₂O.
IMA symbol Ptd, IMA status: questionable, named in 1914.
Occurs as an efflorescence on sandstone in protected outcrops.
It is found associated with Gypsum, quartz.
The name refers to Pintado Canyon, Utah, USA, where the mineral occurs.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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