Crystals used in these inspiration:
Clear crystal, Indian sapphire, Jet, Lavender, Smoky mauve, Violet and Cyclamen opal
Metal plating used in this inspiration:
Black, Nickel and Antique silver
The best thing about flatback settings, is that you can embed whatever you like in them, whether it is crystal rock, flatback pearls, plastic flowers, buttons, plastic druzy, flatback SW crystals, printed cabochons, beads and many more elements that you want to work with.
All of these elements and martials can be easily glued inside the settings with the E6000 glue for jewelry making.
Have fun creating!