Pyriboles
Relief - high
Colour - colourless
RI -
Birefringence -
Interference colours - 3rd order
Comments - Show complex zoning and intergrowths between compositions.
Pyribole/anthophyllite/actinolite (colourless) with carbonate and chlorite
PPL
Metaperidotite, Achmelvich, NW Scotland
Pyribole/anthophyllite/actinolite with carbonate and chlorite. The field of view above under ccrossed polars.
XPL
Metaperidotite, Achmelvich, NW Scotland
Pyribole/anthophyllite/actinolite with carbonate and chlorite
XPL
Metaperidotite, Achmelvich, NW Scotland
Euhedral/subhedral crystals showing complex compositional zoning. The cores are probably anthophyllite or actinolite, the 'wings' are probably triple-chain pyriboles (jimthompsonite, chesterite).
XPL
Metaperidotite, Achmelvich, NW Scotland
Euhedral/subhedral crystals showing 'wings' of triple-chain pyriboles (jimthompsonite, chesterite).
XPL
Metaperidotite, Achmelvich, NW Scotland
Euhedral basal section of ?anthophyllite, with complex zoned triple chain pyriboles/anthophyllite/actinolite.
XPL
Metaperidotite, Achmelvich, NW Scotland