The photo is of the actual pendant that is for sale ( SIL_0148_Blue_Raindrops_a ). Handmade by me in 2019, no two pendants are exactly the same. The pendant is made of 0.925 silver (aka sterling silver), and lead-free transparent vitreous enamel applied in the plique-a-jour style. The layers are built up into glass in several firings in a kiln at roughly 1400 to 1450 degrees. Because it is transparent glass, the color reflects the light it is in. Think stained glass.
This pendant is roughly 30 mm tall by 10 mm wide by 3 mm thick (1.18 in by 0.39 in by 0.12 in). This pendant includes a 0.925 silver chain of 18 inches.