Strengite
A variety of Minerals
What is Strengite?
Strengite is a relatively rare iron phosphate mineral with the formula: FePO4 · 2H2O. The mineral is named after the German mineralogist Johann August Streng (1830–1897). Lavender, pink or purple in hue, it is similar to variscite and is partially soluble, particularly in conditions where there is a low pH and low oxidation-reduction potential.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Strengite 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.
Strengite Localities Map
See where Strengite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Purple, violet, pink, peach-blossom-red, carmine, greenish white, colorless; Colourless to pale pink in transmitted light.
- Hardness (Mohs)
- 3.5 - 4
- Density
- 2.84 g/cm³
- Streak
- white
Chemical Properties
- Chemical Formula
- FePO4 · 2H2O
- Elements
- Fe, H, O, P
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Strengite FAQs
How do I identify Strengite?
Strengite can be identified by its hardness of 3.5 - 4 on the Mohs scale, Purple color. Look for these key characteristics when examining specimens.
What color is Strengite?
Strengite typically appears in Purple, violet, pink, peach-blossom-red, carmine, greenish white, colorless; Colourless to pale pink in transmitted light.. Color can vary depending on impurities and formation conditions.
How hard is Strengite?
Strengite has a hardness of 3.5 - 4 on the Mohs scale. This gives it moderate hardness.
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