Antique Lab Grown Ruby Natural Diamond Halo Ring Solid 10k Gold size 6.25

This is an Edwardian era lab-grown ruby, haloed by natural rose-cut diamond chips. It does appear that one stone was replaced--likely in the early 20th century with a single cut. I don't find it noticeable at glance--but want to disclose it. The diamonds are going to be in the I clarity with a grayer coloring. The ring is unmarked (common for the era) but is tested and guaranteed to be solid 10k gold. The ring is a size 6.25.

The ruby is about 5.75mm. A rough guess is about .25ctw for the diamonds. The ring weighs 2.1g.