Vintage silver ring with interchangeable gems

Vintage, pre-owned estimated size 5/6 interchangeable gems - jade and tiger eye looks like it's stamped STFR but I believe it is actually STER for sterling silver purchased at local Arts festival in Florida '89/'90. listed on other platforms. I will consider reasonable offers through the offer link or you can submit a bundle offer to save on shipping cost. Please review all pictures and ask any questions to ensure the item(s) is the color, condition, size, etc. that you are looking for. Thank you for stopping by 🤗