It looks like you're describing a type of surface material, perhaps a composite or natural stone like marble, which is predominantly blue in color with gold veining. This kind of material often evokes a sense of elegance and depth, making it popular for use in architectural and interior design projects. The reference to the seabed suggests a deep, rich blue reminiscent of ocean depths, while the gold veining adds a touch of luxury and sophistication. Materials like this are widely used for countertops, flooring, wall cladding, and other decorative surfaces in both residential and commercial settings. They are prized for their beauty, durability, and the unique character they bring to spaces.