avant-garde gemstone 925 Silver Jewelry settings, Van Cleef & Arpels patented the "Mystery Setting" in the 1930s, which allowed colored gemstones to be showcased without any visible metal. To achieve this, grooves are carved Remy Human Hair into the side of the gem's pavilion which is slotted onto tiny metal rails. One of the latest innovative settings is Engagement Rings gems within gems with no visible metal.