To create these "glass tiles", I adhered a brass stencil of squares to the patterned paper and applied Versafine ink, making sure that the ink only went inside the open squares and not past the outside edges of the stencil. After removing the stencil, I applied clear embossing powder and heated it. This can be done as I have, on patterned paper, or over a stamped image.
Papers: white cardstock (Georgia Pacific), purple cardstock (Bazzill), pp (Creative Imaginations)
Ink: Colorbox Black
Accessories: ribbon (Kathy G.), black embossing powder (stash), clear embossing powder (stash), Copics, brass stencil (Lasting Impressions)