Mods: made higher back neck with some short rows, sewed in shell buttons to fasten up open slits.

Knitted with golden metallic thread. Now it sparkles like a real granite stone :)

Very long (and boring) project. Huge row gauge took a lot of time. But the result is worth of any efforts.

Sweaterpile in the last picture:

Robin
Granite
McIntosh
Triffle