Do you recognize this marbled brick?

Pikka

I recently purchased a large lot of used Lego and found a strangely colored 2 x 4 brick (3001) – image attached. It's white with light aqua marbling – on the outside it's mainly white, but on the inside light aqua prevails. I couldn't find this color combination in any catalog, so I suppose it's a defective brick that escaped the quality control check. I know there is a market for marbled bricks – especially ones with weird psychedelic patterns – but mine is rather bland.
So, what would you guys do with it? Sell it here as an ordinary white (or Light Aqua) used brick with a note: "Some marbling present"? Or keep it as a curiosity? Any other ideas?

Area 51 Bricks

I would A: keep it or B: try to sell it on eBay...

Jay37

Given that it has the more modern cross support underneath it rules it out for being a Grangemouth or Bayer test brick. Probably a production error that slipped through. I agree with @TheBrickRoom on what to do with it but I would be interested in adding it to my collection