Unknown beachworn conus

[wateryworld]

These five cones were given to me, so I've no idea where they'd be from, but I'm assuming they are rather beachworn due to their unusual coloration.  The only one I was able to find in the book was called conus sponsalis.  Does anyone have any idea what these could be?  Purple and pink don't appear to be standard cone colours!  Is this due to bleaching?

Thanks!

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