Thank you for viewing! This is a very lovely necklace. I received it as a gift, so I don't know the details. It appears to be an artificial diamond (zirconia? moissanite?) held securely by four prongs, creating a presence on the neckline. The stone is approximately 6mm. The necklace is silver 925, and the chain has a 5cm adjuster (approximately 45cm to 50cm), allowing you to adjust the length to your liking. The box is light blue. If you don't need the box, I will discount the price by 500 yen. Please let me know in the comments before purchasing. Although it is new and unused, I took it out of the bag only once for the photos. I appreciate your understanding regarding home storage. Reference from the manufacturer's website below: The base metal uses skin-friendly sterling silver, so those with metal allergies can use it with peace of mind. Furthermore, it is multi-layered plated to prevent discoloration and maintain its beautiful shine. [Handmade 4-prong setting] The design uses a 4-prong setting to securely hold the stone, so you can use it without worrying about it falling out. The shape of the prongs is deliberately simple, creating an elegant and sophisticated impression. It is perfect for everyday use for a wide range of ages and for special occasions. [Gift package for gifting] The KRKC necklace comes with a high-quality gift box, so it can be given as a present as is. It's a heartwarming gift, perfect for birthdays, anniversaries, and even everyday surprises. It delivers a special time to both the giver and the receiver. k1-36