Thank you for viewing. These hook earrings feature a pinkish ruby that dangles and sways, offering both a mature and cute look. All the metal components used are K18 gold. Please rest assured that there is no coating. They have sturdy, slightly larger hooks, with a K18 hallmark on the hook portion. The ruby fluoresces under a black light. See image 8. I obtained these a while ago and have only tried them on. The gold shows no discoloration and is in a pristine, sparkling condition. I have not worn them out. The color is suitable for the upcoming autumn season. Earring Length: Approximately 25mm Ruby: Approximately 8mm x 5mm Weight: 1.23g *Measurements are approximate. *Weight is also approximate, so there may be some error. Before listing, I cleaned them with my ultrasonic cleaner (image 10) and a gold-specific jewelry cleaner, so I believe you can use them with peace of mind. There may be overlooked scratches, scuffs, or dullness. Please refrain from purchasing if you are a sensitive person, overly concerned about the condition, or seeking perfection, as these are used products and have been stored at home. Due to the prevention of item substitution, exchanges and returns are not accepted. Thank you for your consideration. Material: K18 (18k Yellow Gold) No accessories included. #k18 #18k #earrings #hookearrings #ruby #naturalstone #powerstone #mineral