Product Description: ★ Opalized Ammonite An ammonite from the Cretaceous period of the Mesozoic Era, approximately 145 to 66 million years ago. Era: Cretaceous Period (approx. 145 to 66 million years ago) Long diameter: Approximately 36mm Weight: Approximately 13g ★ Flake Stone Tool - Arrowhead Era: Unknown Long diameter: Approximately 45mm ☆ Fossils in extremely good condition, when polished, begin to reveal luster, shine, and transparency. As they are finished, they develop iridescent play of color that changes with the angle, making each one endearing. The miracle of the ammonite, which continues to shine beautifully even after becoming a fossil, is a breathtaking sight that makes one feel the mystery of nature. We hope you will enjoy this one-of-a-kind masterpiece as a collection or as educational material for your children. 【Shipping】 Shipping will be via Yu-Yu Mercari delivery. It comes with a guarantee, so you can rest assured. We will ship as soon as possible after confirming payment. We always aim for safe, secure, kind, and courteous transactions to ensure a pleasant experience. Ammonite, Fossil, Natural Stone Bracelet, Crystal, Amulet Feng Shui, Fortune, Power Stone