Any idea what this is?

[CharmedOne]

I saw this on ebay from a seller I have purchased from a few times. It's getting a lot of bids so I was just wondering if anyone has any idea what they are. Here is the listing. Thanks so much. ~d

http://www.ebay.com/itm/Stunning-Vi...s_VintageFineJewellery_CA&hash=item1e831df9fa

 

[Ash]

Looks almost like agate to me. but it is a guess at best.

 

[GemGeek]

It said they were shells. Very interesting and I love the color.

 

[CharmedOne]

Thanks for your help I thought the colors were kinda neat too but for $215.37, somebody knew something I didn't