Son found this on the beach and is adamant its something special.
About the size of a lump of coal with glass like speckals.
this post was submitted on 31 Jul 2023
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What is this thing?
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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