You know your clients best, so give them the best with the first in our Guardian Series, our Guardian Mercury threadless end. Guardian Mercury has one elegant marquise cut cubic zirconia set perpendicular to a sleek moon silhouette. This threadless end comes in 14k yellow gold, white gold and rose gold with a CZ gem in the middle. Use this piece as part of a complex or unique curation, or make it a star of the show! It measures 6.60 mm x 5.20mm.