Band one-of-a-kind trillion cut tanzanite necklaceDescription 18k yellow gold trillion cut tanzanite necklace, set in Januka's proprietary band setting. Dainty and sophisticated for any occasions, whether it is business or casual. This necklace has a silicon adjuster at the back which allows you to shorten it to the length you desire to fit your look of the day. Band collection from Januka uses their proprietary setting method which tactfully carves each stone, so the gold sinks perfectly into the