COLOR. Tortoise Ivory MATERIALS. Cellulose Acetate DIM. .6'' Diameter Hypoallergenic Post - Stainless Steel Cellulose Acetate Material ~ Much stronger and more durable than an acrylic material. Cellulose acetate is less brittle and wont break as easily. A renewable resource ~ essentially made from a wood pulp. It is the same material used for high-end eyewear frames. A fresh take off the classic tortoise shell hoop earrings. sustainable & eco-friendly jewelry