AWESOME Granite Mortar Bowl Wampanoag Indians Martha's Vineyard Rare Find. Condition is Used. Shipped with USPS Priority Mail. Here's just an AWESOME find in Massachusetts at Martha's Vineyard made by the Wampanoag Indians. A Friend of my was visiting there while he found this Beautiful Bowl. This is in great condition and the weight is approximately 36 pounds. Made out of Granite. This measures approximately 17" 1/2 inches at the longest point and 5" inches at the thickest point. And ...10" 1/2 at the widest point. The Bowl is approximately 2" 3/4 inches deep. This would make a spectacular piece to add to your collection, I believe this should surly belong in a Museum personally. Please view my pictures for a better condition and description. If you have any questions please contact me and Thanks for looking.