Ferri-obertiite
A variety of Obertiite Root Name Group
What is Ferri-obertiite?
Ferri-obertiite is an amphibole group mineral that was formally approved by the International Mineralogical Association in 2015. It has the chemical formula Na(Na2)(Mg3FeTi)(Si8O22)O2. Ferri-obertiite is highly sodic and is especially characterized in the presence of oxygen instead of a hydroxy group or fluorine at the W site, which compensates for the relatively high positive charge due to the dominance of ferric iron and presence of titanium. Similar to many other amphiboles, ferri-obertiite is monoclinic with space group C2/m. The name honors professor Roberta Oberti of the University of Pavia, Italy.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ferri-obertiite 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.
Ferri-obertiite Localities Map
See where Ferri-obertiite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Pink-orange
Chemical Properties
- Chemical Formula
- Na(Na2)(Mg3Fe3+Ti)(Si8O22)O2 Ferri-obertiite is a obertiite root name amphibole in the WO2- dominant amphibole group with Mg as the dominant element in the C2+ position and Fe3+ as the dominant element in the C3+ position.
- Elements
- Fe, Mg, Na, O, Si, Ti
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Ferri-obertiite FAQs
How do I identify Ferri-obertiite?
Ferri-obertiite can be identified by its Pink-orange color. Look for these key characteristics when examining specimens.
What color is Ferri-obertiite?
Ferri-obertiite typically appears in Pink-orange. Color can vary depending on impurities and formation conditions.