DescriptionThese tourmaline stone are especially helpful in improving the living environment. It can be used for fish tank and aquariums to offer fish a comfortable living environment and simple colors design can improve the visual enjoyment.Features-Color:As Shown -Material:Black tourmaline -Size:4.00X4.00X2.00cm/1.57X1.57X0.79in -Note:The product is irregular and the size is about 2-4cm.- These natural tourmaline stones have a smooth finish with no rough edges, stylish and beautiful.- The unique design and exquisite craftsmanship ensure its popularity and practicality.- Use for a unique decor in vases, fish tank, planters, aquariums, home and office decoration, etc.- Also for ponds, water features, fountains, pots and pathways outside, featuring good decorative effect.- Perfect to meet your most decorating needs, with these stones you can add beauty to all your needs.