Formula: (Fe,Fe)2-3Si2O5(OH)4
Origin of name: From English word green
Crystal system: Monoclinic
Crystal class: m
Twinning:
Unit cell:
Colour: Dark green to black; light yellowish green to bluish green in transmitted light
Diaphaneity: Translucent
Luster: Dull
Habit: Massive; rounded granules, minute
Hardness:
Specific gravity: 2.85 to 3.15
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Weakly magnetic
| Back to Alphabetical list | Colour photos | Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |