There are no engravings or certificates for the stone or chain, and the type of stone is unknown. Please read the entire description before purchasing. Returns and exchanges will not be accepted due to the increase in return and exchange scams. Ladies' Heart Purple Heart Necklace Flower Pink Necklace Both tops are approximately 1.7 cm Flower chain Approximately 42 cm Heart chain Approximately 40-45 cm If you have any questions, please ask before purchasing.