Under the bright lights of Super Bowl LX, where legacy and excess have always shared the same locker room, one diamond encrusted chain has decided that subtlety is overrated.  Nearly $13,000 worth of frozen bravado now hangs in the balance — a custom Super Bowl LX chain designed for the grand stage in Santa Clara, where the Seahawks and Patriots will collide with history on the line. The centerpiece is impossible to ignore: an 80mm-by-65mm Super Bowl LX logo pendant, flooded with 25MM diamonds,