Metamorphic texture
Symplectite / kelyphite texture
Fine intergrowths of two or more minerals. Kelyphite is a symplectite rim formed by garnet breakdown.
What it means
Breakdown reactions as pressure or temperature changed.
Where to look for it
Granulite, eclogite, garnet peridotite
Photo examples
Alex Strekeisen (symplectite) · Alex Strekeisen (kelyphite) · Search Wikimedia Commons