Chronograph watches are typically sporty affairs. While Patek Philippe claims its new Aquanaut Luce "Rainbow" Chronograph is designed for active ladies, its abundance of gemstones says otherwise. The brand's first self-winding ladies' chronograph features a 39.9 mm rose gold case with an octagonal bezel of two rows: an inner row of 40 flawless rare white Top Wesselton diamonds, and an outer row of 40 sapphires that transition through the colors of the rainbow. A white mother-of-pearl engraved dial lets the stones' colors shine, including the sapphire hour markers that are set outside the gold numerals. It's powered by a Caliber CH 28‑520 movement, visible through the sapphire caseback, and arrives with three composite straps — one each in red, matte beige, and matte white — with a diamond-set fold-over clasp.