I received this at my Hatsumiyamairi (Shinto shrine visit for newborns). I used a different stone for my Okuizome (first meal ceremony), so this is unused. I opened it for the photos. I was told to sterilize it by boiling before use. I also received a set of red wooden chopsticks and a spoon, but I have many spoons, so I'm selling this one. - Set Contents: Chopsticks, spoon, tooth-hardening stone - Color: Red - Material: Wood #Okuizome #ToothHardeningStone Thank you for looking.