Rhinestone Guy (RG) Asymmetrical Square Shape is a larger, flat back square similar to Swarovski Square Art. 2420. It features multitude of facets that reflect lights in multiple directions. They are part of the collection of rhinestone luxury crystal (glass) shapes.
The stones are flat back and foiled for extra reflection. These are machine cut glass (not acrylic).
These family of crystal is great for intricate designs and other glue on applications.