Vintage Navajo Sterling Silver Heart Pendant Charoite or Sugalite & Lapis. Marked Sterling on the back. No maker’s name or initials. It reminds me of Joan Slifka Designs. Including the large bale, it is 3 3/8″ long and 1 5/8″ widest. Weighs 32.6 grams. The blue stone is lapis. Tarnish especially in recessed areas.