Kingman Spiderweb Turquoise Cluster Pendant Native American Shirley Henry. This sterling silver pendant has eleven (11) matched Kingman Spiderweb cabochons set in a cluster design. Total weight is 24.4 grams. It measures 1 1/2″ x 1 5/8″ and has a 1/2 bale. Traditional Navajo workmanship, Sterling silver marked. Kingman Spiderweb Turquoise – The Kingman Turquoise mine is the LAST commercially producing turquoise mine in the United States. The mine, owned by the Colbaugh family since the late1800’s, has produced beautiful veins of turquoise for over 100 years. Touch of Turquoise invites you to Wear the West!