Swarovski 3250 RECTANGLE in VITRAIL MEDIUM, a special effect color that changes with movement. Measuring 18mm x 13mm, just about 3/4" x 1/2". These sew-on stones are drilled with two holes (2mm each) so that they can be sewn securely to fabric.
The flat back enables the stone to lie flush against a surface. They can also be used as connectors and links with jewelry findings. These are foiled on the back for maximum sparkle.