Kidwellite
A variety of Minerals
What is Kidwellite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Kidwellite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Kidwellite Localities Map
See where Kidwellite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Greenish yellow, Greenish white, Yellow, Light green
- Hardness (Mohs)
- 3
- Density
- 3.34 g/cm³
- Streak
- yellow
Chemical Properties
- Chemical Formula
- NaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33 Formula is slightly simplified; for details see Kolitsch (2004).
- Elements
- Fe, H, Na, O, P
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Kidwellite FAQs
How do I identify Kidwellite?
Kidwellite can be identified by its hardness of 3 on the Mohs scale, Greenish yellow color. Look for these key characteristics when examining specimens.
What color is Kidwellite?
Kidwellite typically appears in Greenish yellow, Greenish white, Yellow, Light green. Color can vary depending on impurities and formation conditions.
How hard is Kidwellite?
Kidwellite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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