Piece Unique Perfume by Parfums Gres, There is a certain amount of artistry present in Piece Unique perfume. This unisex fragrance epitomizes haute couture. The opening notes of its composition include angelica, musk, black pepper, mandarin orange and pink pepper. The core notes are artemisia, plum and jasmine. Lastly, the base consists of patchouli, incense, suede and white musk.