LA SPHÈRES Chatham Blue SapphireLab grown, round medium blue sapphire ring. A halo of gold spheres surround the center gem in this artisan made ring. The halo is almost like a little necklace of gold beads and gives the ring a vintage feel. This engagement ring will fit closely next to many available wedding bands(setting will sit above the band). The gemstone is a lab grown medium blue sapphire by Chatham, conflict free by its very nature. Chatham is the premier name in lab created