The Sienna Necklace in Blue Quartz $ 99.00 was $ 200.00 Default Title - $ 99.00 Quantity This product is currently sold out. Please fill in the form below if you'd like to be notified when it becomes available. This elegant blue quartz gem chain necklace with a druzy agate center pendant, is part of the Sienna necklace series. At 36 inches, it is perfect for layering with the Marrakesh or Notting Hill Collections. Shop our Necklace Collection Now.