Sew-on Crystals by Swarovski® from Silks & Crystals are loose crystals that can be easily sewn by hand or with a standard domestic or industrial embroidery sewing machine. They can be sewn onto any kind of textile or accessory. Sew-on Crystals come in two- or three-hole varieties, with round and oval holes for use in a wide range of decorative applications, from fine embroidery to jewellery. Lochrosen are crystals with just one hole. Sew-on Stones have rounded edges around the holes to guarantee thread protection.