Jewelry case made of blown glass with ice crystals as a motif. Ice crystals are small ice crystals, and the beautiful natural phenomena of snow caused by the combination of ice crystals have attracted us. This jewelry case expresses the image of hexagonal pillars, which are the basis of ice crystals, combined by stacking glass hexagonal pillars. The polyhedron's refraction of light becomes more complex and makes the jewelry look beautiful as if it were frozen. In addition, two patterns consisting of clear glass and frosted glass were produced experimentally.