Thank you for viewing. This is a gold necklace with a green cubic zirconia. The material is surgical stainless steel (304). 316L, 304, and 202, known as surgical stainless steel, are low-allergen materials and are used in medical tools such as scalpels and scissors, as well as luxury watches. It is a special stainless steel with excellent properties, such as being rust-resistant and resistant to corrosion, oxidation, and heat. Size: 40cm + 6cm adjuster Top charm: 20mm x 15mm Material: Surgical stainless steel (304) Gold coating Color: Gold Please feel free to ask any questions.