.42 Blue Topaz Necklace in 14K Yellow Gold.  This modern 16” necklace features .42 carats of blue topaz finished in 14 karat yellow gold. Dangling slightly from the bold chain link necklace, three (3) .14 carat blue topaz accentuate the neckline with delicate style. The topaz gems have a faint, icy blue hue that complements the warmer tone of the 14k yellow gold chain.