Review on 🌈 DichroMagic 90 Coe Dichroic Wissmach Texture Scrap on Black - 1/4 lb: Stunning Glass Art Supplies! by Amanda Castillo

I received my order of Dichroic Wissmach Texture Scrap on Black just in time today. Beautiful colors and great details. 3 pieces 2-1/2" x 4" and 4th piece 1-1/4" x 4". The patterns and textures are great and I love the color combination. I'm trying to figure out what the black marks on top of the three large pieces are and I suspect they're taking up that space and reducing the usable length to less than 4 inches. I end up using the adjacent space as small pieces and maybe using black dots just to see what happens. This looks like an area where someone grabbed the part with their thumb or a tool. when did you cover I still don't know enough about dichro to understand how it's done.