This is a pigment I purchased from Pigment Tokyo about two years ago. I opened it shortly after buying it, but have not used it since. It was stored with oil painting materials, so the sticker on the front of the bag has discolored, but the contents show no discoloration or other changes. ↓ From the Pigment Tokyo website: [Ir] WNT 605 Price: 880 yen per 15g Particle size: Φ5-40µm This pigment is composed of thin, plate-like natural mica and is coated with a layer of metal oxide. It is characterized by a wide range of expressions and colors, from smooth hues to those with strong luminosity and polarization. Type: Art supplies