Maternal History

I want to clarify the history of my engagement ring because I think it's really cool :) 

It was the engagement ring of my mother's great grandpa's sister, Grace.  Or my mom's mom's dad's sister.  Or my grandmother's mother's aunt.  I think all those work and I've got that right.  Aunt Grace didn't have any children so the ring was first passed down her niece and namesake, my Nana's mother.  Then passed down to my Nana, then my Mom and now to me.  What I find extra special is that I'm the first to receive the ring as an engagement ring since the original owner, my great-great-aunt Grace in 1870 (best estimated year).  Let's hope we have a girl at some point so I can continue to pass it down the maternal side of our family tree!