Mother's ring with birthstones came up missing

I left it on the kitchen counter at my son's house one evening. I typically took the ring off because I washed dishes everyday I was there watching my grandson. 

It was my grandma's specially made ring from her husband my step grandfather. Her 3 children's and my and my eldest son's birthstones were on this gold ring.

She and my eldest son's birthday are in December, the garnet. My birthday is July the ruby. My mother's birthday is in May the emerald. Grandpa and uncle Kenny's are in November the topaz. My uncle Paul's is in March the 

 2 garnets

1 ruby

1 emerald 

2 topaz