What a distinctive necklace made these three bluish-green crystals together!
One 18mm x 13 mm turquoise crystal makes the largest lake followed by a 12mm cerulean blue round one and a milky sea foam 10mm one. They are encased in beaded bezels that I made with stainless steel coloured Miyuki Delica beads and gold, silvery green, and turquoise round seed beads. 
I've got the inspiration from some artificial lakes not too far from my house, in Elan Valley in Mid Wales. 
The pendant, including the beaded bail, is 1 1/4 inches (4.5 cm) long and 3/4 inch (2 cm) wide and comes with a 16-inch (45 cm).
I prefer to send my jewellery via second-class Royal Mail service unless you instruct me otherwise.