*Material: Natural Stone and crystal,Size: 23*23*8mm, Weight: 10-11g,(1cm=0.393inch,1inch=2.54cm) *Why buy natural crystals ?Natural crystals have absorbed energy from nature for tens of millions of years,Wearing natural crystals can change one’s energy and magnetic field so as to maintain one’s spiritual happiness and physical and mental health. *Crystal crystal necklaces are ideal gifts for loved ones during Christmas, Anniversary, Valentine’s Day, Mother’s Day, Father’s Day and Birthday. It is suitable for men and women, suitable for casual wear or formal wear, to provide the perfect day and night accessories. *Any natural stone / natural Ammonite are hard to keep a fixed shape,color and veins,actually no two are alike,so please understand if you got the items have difference with picture,thank you!Please allowed 1-5mm differences due to manual measurement,thanks! *Service: Your satisfaction is our greatest honor. If you have any questions after receiving the product, please contact us in time. We are 100% committed to your complete satisfaction.