Hopeite
A variety of Minerals
What is Hopeite?
Hopeite is a hydrated zinc phosphate with formula: Zn3(PO4)2·4H2O. It is a rare mineral used mainly as a collectors specimen. Hopeite crystallizes in the orthorhombic system with prismatic, vitreous white to yellow crystals. It also forms druzy encrustations and reniform (kidney-shaped) masses. The related mineral parahopeite, which has the same composition but different crystal structure, is triclinic. The minerals are formed through oxidation of sphalerite by the presence of phosphate-rich solutions It was first described in 1822 from Moresnet, Liège Province, Belgium and is named after Scottish chemist, Thomas Charles Hope (1766–1844) of the University of Edinburgh. It has been found in Zambia associated with lazulite. Hopeite is one of the 2 conversion minerals arising from the application of the rust converter 'Fertan'.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Hopeite 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.
Hopeite Localities Map
See where Hopeite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
More Images
Quick Facts
Physical Properties
- Color
- Yellow, white, colourless, grey or brown; colourless in transmitted light.
- Hardness (Mohs)
- 3.5
- Density
- 3.08 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Zn3(PO4)2 · 4H2O
- Elements
- H, O, P, Zn
Also Known As
Identify Hopeite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
Hopeite FAQs
How do I identify Hopeite?
Hopeite can be identified by its hardness of 3.5 on the Mohs scale, Yellow color. Look for these key characteristics when examining specimens.
What color is Hopeite?
Hopeite typically appears in Yellow, white, colourless, grey or brown; colourless in transmitted light.. Color can vary depending on impurities and formation conditions.
How hard is Hopeite?
Hopeite has a hardness of 3.5 on the Mohs scale. This gives it moderate hardness.
%252FAbenakiite-(ce)-01.jpg&size=small)
