This is a magatama (curved bead) from the middle Kofun period. It is made of very beautiful green glass. I believe it predates the significant shift in preference from dark green magatama, primarily made of jade and jasper, to the vibrant red magatama that came from the continent. Its seahorse-like shape is also characteristic of the middle Kofun period. While magatama made of agate and jasper are common, those made of glass, which represented the cutting-edge technology of the time, are extremely rare. How about it, if you like it? - Color: Transparent dark green - Shape: Curved shape - Presence of hole: Yes Thank you for looking.