Maricite is usually colorless to gray, but is sometimes a pale brown color and it has a white streak. It has a vitreous luster due to its low values of refractive indices, α = 1.676 β = 1.695 γ = 1.698, and its opacity is transparent to translucent (Fleisher, et al., 1979). Maricite has no cleavage or pleochroism, and it does not fluoresce in UV light.