【Oregon, USA】Oregon Sunstone: Rare Gemstone Trends & Value In 2025
Editor’s NoteThis guide explores the Oregon sunstone, a unique gemstone prized for its beauty, geological origins, and growing cultural and economic…
copper inclusions
【Brazil】Interesting Metallic Platelets in a Brazilian Paraíba Tourmaline
Editor’s NoteThis article details the gemological analysis of a rare 2.52 ct Paraíba tourmaline, confirming its Brazilian origin through advanced…