Grain d'Opium is a French boutique blending Asian folklore with European vintage charm. Founded in Lyon, it offers handcrafted jewelry inspired by Japanese, Indian, and Tibetan traditions, using materials like bronze-toned brass and natural stones. Each piece reflects a fusion of Art Deco and Art Nouveau aesthetics.

Beyond jewelry, the shop features vintage Japanese kimonos from the Shōwa era, showcasing traditional techniques like yuzen dyeing and gold-thread embroidery. Miu personally restores these garments, giving them new life.

Grain d'Opium also offers unique home décor, such as sea urchin lamps and herbariums, crafted from natural and recycled materials. Committed to sustainability, the boutique emphasizes ethical sourcing and artisanal quality.