Synadelphite
A variety of Minerals
What is Synadelphite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Synadelphite 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.
Synadelphite Localities Map
See where Synadelphite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless (crystal centers), red to brown (exteriors), blackish; colourless to pale brown or reddish in transmitted light.
- Hardness (Mohs)
- 4.5
- Density
- 3.56 g/cm³
Chemical Properties
- Chemical Formula
- Mn2+9(As5+O4)2(As3+O3)(OH)9 · 2H2O
- Elements
- As, H, Mn, O

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Synadelphite FAQs
How do I identify Synadelphite?
Synadelphite can be identified by its hardness of 4.5 on the Mohs scale, Colourless (crystal centers) color. Look for these key characteristics when examining specimens.
What color is Synadelphite?
Synadelphite typically appears in Colourless (crystal centers), red to brown (exteriors), blackish; colourless to pale brown or reddish in transmitted light.. Color can vary depending on impurities and formation conditions.
How hard is Synadelphite?
Synadelphite has a hardness of 4.5 on the Mohs scale. This gives it moderate hardness.


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