$1,495Median
1Sold (12 mo)
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Kidwellite specimens for sale
3 for sale · $250–$2,500 USD
6 in the gallery
Kidwellite is a hydrated phosphate mineral with iron in the 3+ state, forming as often acicular or tabular crystals in hydrothermal settings. The mineral commonly displays a pale to medium blue or greenish hue and a vitreous to silky lustre, sometimes appearing as radiating sprays or fan-like aggregates. Its habit and color make it recognizable under magnification, particularly when grouped in slender crystals that reflect light along their elongated faces. The type locality and known specimens include occurrences from the USA and Sweden, where mineralogists have documented fine examples in associated phosphate-rich assemblages.
- Formula
- NaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
Buy Kidwellite specimens
View all 3Where Kidwellite is found
Top localities
- Phosphate Stope3 specimens
- Nevada2 specimens
- Arsenate Drift1 specimen
- Norrbotten County1 specimen
About Kidwellite
Collectors prize Kidwellite for its delicate crystal delicacy and the intrigue of phosphate-bearing systems. The combination of color, crystal form, and its relative rarity enhances its appeal among optic collectors and those pursuing well-documented localities. While not among the most common minerals, steady finds in select deposits provide opportunities to study its structure and relationship to other phosphate minerals, offering a rewarding specimen for display and cataloging in a focused collection.
