Description:After enough sun or light exposure, these stones can achieve good luminescent effect in the dark and last approximately 5 to 8 hours.This luminous stone is characterized by mini size and light weight, which enables it to be carried around conveniently.Stone is made of non-radioactive resin, which is eco-friendly and does no harm to human body.The length of the product is 1.3cm, the width is 0.9cm.These stones can be used to create a beautiful and somewhat romantic path, aquarium or garden.Item Name: Luminous StoneMaterial: ResinFeatures: Multiple Colors, Luminous, BeautifulSize Details: 1.3cm x 0.9cm/0.51" x 0.35" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Thequantityisabout300pcs,duetomanualcalculation,thequantitymighthas1-5pcsmoreorless,hopeyoucanunderstand,thankyou.Package Includes:300 x Luminous Stone