On Facebook -JOIN I Antique Online.com: Collectors of Antiques and Collectibles.
Here is the link for the group https://www.facebook.com/groups/327133184409134/
Please join our FB group where YOU can post directly.
A Community For People Who Buy, Sell or Collect Antiques, Collectibles and Art
Can we have some pictures of them or are we supposed to guess what they look like?
To post pics use the 2nd icon above--mouse over, "image".
There are some rare shells but most collections are obtained by the tourist and are personal to him or her, only as reminders of their beach vacation.
Pictures would help.
In the meantime check out these collections to help identify what you have and their worth.
Also, check Ebay 'sold' for shells and identify which ones you have. I bought one box a while back from a huge collection from a late marine biologist, all superb examples with labels. One went for 129.-a Brazillian conch.
I grew up in a beach side community and have a vast array of sea life knowledge, but can't impart much without imagery.
If you are experiencing difficulties trying to post any imagery, try instead some additional online research.
Let us know if these links help, or if further assistance may be required, we'll see what we can do.