More than 60 minerals can be found on the island, particularly blue glaucophane ( observable on the surface ), epidote or garnet.
32.
Secondary minerals such as calcite, epidote, quartz or talc can precipitate from the circulating groundwater filling the voids and cementing the rock.
33.
The specific gravity of calumetite could not be measured because of the difficulty in separating the quartz and epidote from the calumetite mineral coating them.
34.
Typical minerals formed at this time include garnet, pyroxene, epidote, chlorine-rich amphiboles, malayaite, vesuvianite, siderite and axinite.
35.
The best developed and largest crystals are those found with orthoclase, quartz, epidote, and calcite in veins in granite at Arendal in Norway.
36.
The name dollaseite-( Ce ) was chosen in honor of Professor Wayne Dollase, who performed broad research on the epidote-group minerals.
37.
It is a metamorphic rock, a crystalline marble with crystals between 0.2 e and 0.6 mm, with coloured veins of epidote and chlorite.
38.
Quartz crystals make up 25 %, plagioclase 5 %, alkali feldspar 10 %, biotite 5-10 % which is altered to chlorite, epidote and leucoxene.
39.
Pleochroism is often especially intense in small spots which surround minute enclosures of other minerals, such as zircon and epidote, these are known as " pleochroic halos ."
40.
It contains Donaldson Formation ( a marine fan ), Savage Dolomite which contains stromatolites; Bernafai Volcanics containing albite epidote actinolite chlorite; Corinna Dolomite, and Tunnelrace Volcanics.
