Since collections can have completely different description fields a direct transfer is not possible, but there is an easy way to do it.
Few simple steps an you're done:
1. You need to create an export of all the samples want to transfer from original collection. You need to check their boxes in the list view.
2. Click on export.
3. Go to the target collection and download import template:
4. Copy the columns from the export file to the new import template. One column at a time, and paste as values. Do not copy the SysID column! make sure you follow the general import instructions.
5. Upload the file to target collection, from the import page:
Please note that duplicate catalog numbers are not allowed, so the item from the original collection (or at least it's cat. number) should be deleted first.
6. Go back to original collection, check all transferred items and choose 'Delete'.