The Earrings and Butterfly Backs are made from Sterling Silver and plated in Rhodium, which keeps it shinier for longer.
The Earrings are set with Swarovski Zirconia stones. These are high quality Cubic Zirconia's made by Swarovski. They are different to Swarovski Crystals. Swarovski Zirconia closely resembles diamonds. A tiny Swarovski logo has been laser-etched onto each stone, this mark can only be seen with a 10x loupe.
Metal: Rhodium-Plated Sterling Silver
Stone: Swarovski Zirconia Imperial Mosaic Cut, 6.5mm
Weight (Single Earring, without butterfly): 1.17g
Total Weight (pair of earrings including butterflies): 2.64g
Height: 7.73mm
Width: 7.73mm
Thickness: 5.18mm
Hallmark: No, silver jewellery does not have to be hallmarked if it weighs under 7.78 grams.