Rocksday

Migmatite

A rock that was heated until it partly melted, leaving swirls of light granite in dark gneiss.

Migmatite specimen
Photo: James St. John, CC BY 2.0, via Wikimedia Commons

How to identify migmatite

  • Swirling, folded light and dark layers.
  • Pale granite-like patches and veins.
  • Coarse grains.

Often confused with

Where it's found

  • Finland
  • Scottish Highlands
  • Canadian Shield

Uses

Countertops and building stone.

Rock tumbling

Great for tumbling.

Did you know?

Its name means 'mixed rock' — part metamorphic, part igneous.

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