Hello,I would love to help. There were no photos that came with your question. This is a problem that the site has been having and it is not your fault. Please use the Add Files feature on your screen to add pictures of the item and any writing or labels. Sorry for any extra work!
This is not a common item, but I can make an assumption based of things I've seen in the past.
The acrylic case means it was intended for display and the tube filled with dust would lead
me to conclude that it is someone's ashes or ashes from the remains of an important (sentimental or otherwise) building.
It is a shame that there is not a plaque or paperwork with it. For this reason, I could not give it a value.
I do hope what I have added fits with where you got the piece and from that you can put a history together.
To finish, I will need you to click the five stars at the top of your screen and hit the submit button, thanks!
You are so welcome!
Do click the stars for me, I would really appreciate it.