Images
Formula: Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2
Inosilicate (chain silicate), amphibole,
hornblende root name group,
calcium amphibole subgroup,
amphibole supergroup
Crystal System: Monoclinic
Specific gravity: 3.275 measured, 3.204 calculated
Hardness: 5
Streak: Pale grey-green to grey-white
Colour: Dark green to green-black
Luminescence: No fluorescence under UV
Environments
Magnesio-ferri-hornblende is a relatively new mineral, approved in 2022, but first published without approval
in 2016.
Localities
At the type locality, the magnesio-ferri-horblende type locality, Jinghe county, Bo'ertala Autonomous Prefecture,
Xinjiang, China, magnesio-ferri-hornblende occurs as subhedral columnar crystals up to 3 mm in length in
porphyry skarn.
Associated minerals include plagioclase,
quartz, K-feldspar,
biotite,
magnesio-hastingsite,
zircon, magnetite,
apatite and titanite
(Mindat).
Back to Minerals