Vanadinite Paper Crystal Model Below is a cut-and-fold paper crystal model of a hexagonal crystal, like the vanadinite crystals that have been found in Arizona. Cut it out on the Solid lines. Fold on the dotted lines. Then, carefully match the tab with the opposite crystal face. The final crystal model looks best when the tabs are glued or taped to the inside of the opposite crystal face. NOTE: If you want color, you will want to color your crystal model before you cut it out!