Hedenbergite (CaFeSi₂O₆) is the iron-rich end-member of the diopside-hedenbergite continuous series in the calcium clinopyroxene group. It forms classic skarn assemblages at the contact between iron-rich rocks and limestone, producing dark green to black prismatic crystals on calcite or magnetite matrix. Famous from Nordmark (Sweden) and Sichuan/Liaoning skarn deposits.
Key Facts
- Mohs hardness 5.5–6.5.
- Monoclinic; ~87° prismatic cleavage angles (pyroxene diagnostic).
- Forms continuous solid-solution with diopside (Mg endmember).
- Iron-rich pyroxene of calcic skarn assemblages.
- Common with andradite garnet and magnetite at carbonate-igneous contacts.
Notable Localities
Nordmark and Långban (Sweden) are type-area sources. Sichuan and Liaoning skarn deposits yield Chinese collector specimens.
Found at these Localities
- Sichuan (四川)
