This series of tableware is made of Water Buffalo Horn, not unlike the ferrules commonly found on Japanese-style handles. They are extremely well-finished and have a nice polish. Being a natural material, the color and pattern may vary greatly (the actual product may vary from photos).
The Chasaji is a spoon traditionally used for measuring tea. This spoon holds approx. 5ml of water.
The Water Buffalo Horn products are NOT dishwasher safe.