Son found this on the beach and is adamant its something special.

About the size of a lump of coal with glass like speckals.

    • @Miarolitic
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      81 year ago

      Yip definitely gabbro.

      OP, the light/ white mineral is plagioclase the dark almost black mineral is pyroxene.

      If you look at it in sunlight anything with a dark green colour is probably Olivine