They are secured by posts and snap down backings.
Sterling Silver African Amethyst Small Round Huggie Hoop Earrings Round Amethyst 1 3/8 ct Metal: sterling-silver Main Stone: amethyst Total Weight 1.25 grams Included in the box: Earrings Pouch Made in Thailand.4 ct Sterling Silver African Amethyst Small Round Huggie Hoop Earrings 1 3/8 ct Amethyst Round Earring Style: Hoop Metal Stamp: 925 Sterling Earring Stone Treatment (Genuine and Lab-Created Gemstones): Genuine Earring Total Number of Stones (Genuine and Lab-Created Gemstones): 16 Dimensions: 0.01 inches (H) x 0.