Vintage retro 80s crazy lace agate silver tone ring size 8 or 8.5

This is from my collection which was originally acquired in the 80s. There is no stamping on the silver to confirm metal material but the stone is real based on where I got it from. I was told it’s crazy lace agate. This was handmade in the 80s. See photos for details and measurements. See last photo - approx a size 8 or 8.5 In very good condition.