What is this?The decorative glass marbles are used as vase filler, decorative rocks/stones for decorating your fish tank, and vases, and can be also used as DIY craft materials, table scatter decor, photography background, etc.What will I get?Material: Glass; Color: Blue; Feature: Flat; Diameter(Approx): 12-14mm/0.47-0.55 inch; Thickness: 8mm/0.31 inch; In the package of: 50Pcs x Flat Glass MarblesAre there any advantages of the product?Made of glass, polished finish for smooth surface, flat shape and shining look, add fun to your life.These glass marbles have great look for decoration, reusable, have water and aging resistance, no fading, and no peeling.How to use it?Place these mini glass marbles at the bottom of the fish tank, or flower vase for decoration or floral arrangement.