Miansai Thin Geo Agate Ring in Metallic Silver. - size 9 (also in 10, 11) Miansai Thin Geo Agate Ring in Metallic Silver. - size 9 (also in 10, 11) Sterling silver ring featuring a single green agate stone in a geometric setting. Imported. MIAR-ML77. 104-0569. Self-taught designer Michael Saiger founded Miansai in the design district of New York City. The handmade collection intrinsically intertwines curiosity and creativity, giving off a classic feel with a touch of youthful influence. Each piece is meticulously crafted from fine Italian leathers, pure precious metals and custom-made marine grade ropes.