Item Type: Rings Metal Type: Stainless Steel Gender: Unisex Main Stone: Luminous Fine or Fashion: Fashion Occasion: Casual, Gift Ring Type: Band (7mm) Ring Size: 6, 7, 8, 9, 10, 11, 12, 13 Shape: Heartbeat Style: Trendy, Romantic Customized: Yes P/S* This is a luminous ring. Place under the sun for a few minutes or illuminate it with the flashlight of your mobile phone or any flashlight for a few minutes. Next, put it in the dark and it will glow.