A 0.71 carat rectangular octagonal aquamarine with 0.26 carats of round London blue topaz, 0.07 carats of round sky blue topaz, and 0.04 carats of round blue diamond in solid 14K yellow gold on an 18-inch rope chain with spring ring clasp - the multi-blue gemstone necklace in genuine 14K fine jewelry gold. Aquamarine's crisp, transparent pale blue is the anchor stone; London blue topaz adds a deeper, richer blue; sky blue topaz provides the palest expression; blue diamond contributes the blue that carries the most cachet in the gemstone world. Together in solid 14K yellow gold, the four blue-spectrum stones create a layered blue composition measuring approximately 0.30 inches wide.