Quote:
Originally Posted by seanliddelow
Thanks, It must have weathered quite a lot in the intervening years. I thought it may have had something to do with WA's volcanic past.
Sean
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I think the shiny surface is what they call "desert varnish". It is a common occurrence out in the arid areas, where the rocks on the surface develop a smooth shiny look. I don't think anyone has completely worked out why it happens yet, either. But take it to the museum anyway, they should soon sort it out for you.