You should know by now that either purple or orange are the way to go for spiney oyster shell. Those are the two sought-after colors. We don't even buy the red and you shouldn't either. Purple requires the deepest dive and thus there is less around. Here, Mr. Cadman has created some simple yet classy earrings. The total weight is .75 of an ounce; they are 1 and 3/8ths-inch long and 1.25 inch wide.