Tweddillite
A variety of Minerals
What is Tweddillite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Tweddillite 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.
Tweddillite Localities Map
See where Tweddillite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Deep red
- Hardness (Mohs)
- 6 - 7
- Density
- 3.84 g/cm³
- Streak
- Brownish red
Chemical Properties
- Chemical Formula
- {CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
- Elements
- Al, Ca, H, Mn, O, Si, Sr
Also Known As
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Tweddillite FAQs
How do I identify Tweddillite?
Tweddillite can be identified by its hardness of 6 - 7 on the Mohs scale, Deep red color. Look for these key characteristics when examining specimens.
What color is Tweddillite?
Tweddillite typically appears in Deep red. Color can vary depending on impurities and formation conditions.
How hard is Tweddillite?
Tweddillite has a hardness of 6 - 7 on the Mohs scale. This gives it moderate hardness.
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