nice breccia & sparkling rock, id me

[alan p]

Love my local beach so many finds, found this yellowish 47grm stone with pyrite looking patches of crystal like stuff which you can see into a few mils, really sparkles in the sunlight, what is it please, love the breccia, 137 grms brown/salmon colour, some tiny holes have shiny black bits in, no visible metal but is attracted to magnet, filed a window and applied veg oil, bit of 3D affect, both found on beach yesterday

 

[Eu_citzen]

You sure? It looks more like porphyry to me. Perhaps a metamorposed one.