This week’s stack pairs 90s neutrals with mixed metals for a low-key luxe vibe. Minimalism meets textural appeal in Nan Collymore’s seven gray diamond Greta band, with its wabi-sabi waviness. Two rings by Lauren Wolf, an edgy-luxe spiked black diamond eternity band and a clean-lined gray-cognac 0.72ct kite cut diamond in cool 18k white gold, add downtown vibes. Top it off with a dramatically curved brown diamond ring by Celine d’Aoust and you have a perfectly understated cool-girl ring stack.