Sold together, the perfect ring stack from NYC-based jewelry designer Catbird! Three threadbare gold rings in size 8.5, one slumbrous opal ring in size 9. Made in Catbird's Brooklyn studio with 100% recycled solid 14k gold. Details for opal ring: 100% recycled solid 14k yellow gold 1.1mm band 2mm and 3mm cabochon cut Australian opals semi-transparent opals showing multiple colors, dominant blues and greens