Ferri-kaersutite
A variety of Kaersutite Root Name Group
What is Ferri-kaersutite?
Kaersutite is a dark brown to black double chain calcic titanium bearing amphibole mineral with formula: NaCa2(Mg3TiAl)(Si6Al2)O22(OH)2. Ferro-kaersutite is the divalent iron rich endmember of the kaersutite group, with the iron replacing magnesium in the structure. It occurs as phenocrysts in alkalic volcanic rocks; in nodules of peridotite and gabbro in alkalic basalts; in syenites, monzonites and carbonatite tuffs. Mineral association includes titanian augite, rhoenite, olivine, ilmenite, spinel, plagioclase and titanian pargasite. It was first described in 1884 and is named for Qaersut (formerly Kaersut), Umanq district in northern Greenland.
Ferri-kaersutite Market Value Calculator
Estimate the market value of Ferri-kaersutite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Ferri-kaersutite Localities Map
See where Ferri-kaersutite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Brown
Chemical Properties
- Chemical Formula
- NaCa2(Mg3Fe3+Ti)(Al2Si6O22)O2 The Kaersutite group minerals are WO2- dominant amphiboles defined with : A(Na+K+2Ca)> 0.5 apfu, B: Ca dominant CTi > 0.5 apfu and WO > 1.0 apfu Ferri-kaersutite is defined with A position: Na dominant C2+ position: Mg dominant C3+ position: Fe dominant
- Elements
- Al, Ca, Fe, Mg, Na, O, Si, Ti
Identify Ferri-kaersutite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you