Symphony Designs by Schaub - Art For Your Home. Elegant and distinctive art pieces for your home today with quality and style to last a lifetime. The Penshell featured on this piece is truly a treasure of the deep! This large fan shapes shell is indigenous to the Philippine waters. The inside of this shell is smooth and shiny and varies in color from black and dark brown to light brown and amber. The shells are crafted by native Philippine artisans for jewelry and high-end custom furniture inlays, and resembles marble in appearance and durability.