uncommon
epidote
pistachio green · it is unakite's green half
The tell
Pistachio to olive green. Sometimes a whole pebble of it, more often a seam or a scatter of green running through a basalt cobble. Either way, it has none of the segmented turtleback of a greenstone and none of the bubbly crust of a prehnite.
If you find green in the Keweenaw, epidote is by far the likeliest answer. Greenstone is the rare one and it looks nothing like this under a tilt.
What it gets mistaken for
- unakite
- isle royale greenstone
- serpentine
- green quartz
The facts
- also calledpistachio green · it is unakite's green half
- age~1.06 billion yrs
- where it turns upSuperior shore · green pebbles and seams
- the field markgreen all through · not bubbly, not segmented
10% of every order goes to northern Michigan animal shelters.