Definitely an interesting direction to take. I really like the idea of the rock being an access to a person's history with a little time travel thrown in. It has potential. Certainly could be blown into a full story with the right narrative. The writing could use a little bit of work, though. Namely, with the formatting and grammar.

I'm not sure if it's just on my end or not, but the entirety of the story is only one big paragraph. You want to make sure you put in the appropriate paragraph breaks to ease the flow of reading. As for the grammar, if you're like me and struggle to find people willing to proofread, then I suggest using tools like Grammarly and Pro Writing Aid. They shouldn't be your only tool for editing, but they can really help to tighten up your work. 

Nevertheless, don't let this discourage you. In the end, you did a great job coming up with a creative take on a rock. The tale is sad and tragic with an unexpected twist which hit the feels for me as I'm a father. You did a great job. With some more writing practice, I truly believe you could come up with something pretty grand. :)