Elrathia kingi - trilobite magnet Quantity in Basket: None Code: MIS-933 Price: $6.00 Shipping Weight: 0.40 pounds Quantity: Time: Middle Cambrian, approximately 540 million years ago. Location: Wheeler Shale, House Range, Millard Co. Utah, USA. Dimensions: 3-3/8" x 2-1/8"