Mineral 1.0Test your knowledge of specific minerals

M
E
N
U
« Home | Browse Minerals | QuizzesMinerals by letter: All | K | G | O | A | H | T | P | C | Q | N | Z | S | E | W | M | B | F | D | L
Minerals by class: Silicates | Halides | Carbonates | Sulfates | Oxides | Phosphates | Hydroxides | Native elements | Sulfides
Silicate Subclasses: Nesosilicates | Pyroxenes | Amphiboles | Frameworks | Sorosilicates | Cyclosilicates | Phyllosilicates
  

« Back to mineral listing

A
N
T
I
G
O
R
I
T
E

Click for expanded view




Antigorite  (Serpentine)Mg3Si2O5(OH)4

Class: Silicate
Subclass: Phyllosilicate
Hardness: 2.5 - 3.5
Density: 2.6
Streak: White
Lustre: Greasy or waxy
Habit: Lath-shaped crystals.
Colours: Shades of green

  Crystal System: Monoclinic
Cleavage: Perfect basal
Fracture: Splintery or conchoidal
Magnetism: None
Reaction with HCl: Unknown

Identification in hand sample:
Lustre, colour and habit are indicative.

Associations:
Formed by hydrothermal action of mafics and ultramafics. Associations may include talc, calcite, brucite, chlorite, magnetite and chromite.

  

Inaccurate data? Better photos? .