L'Oreal Paris Double Extend Eye Illuminator Eyeliner, Black Quartz, 0.048 Ounces. Two-step eye illuminating eyeliner professionally developed to define and visibly brighten your eye color. Ophthalmologist and allergy-tested; suitable for sensitive eyes and contact lens wearers. Black Crystal illuminates all eyes, Black Quartz illuminates brown eyes, Black Sapphire illuminates blue eyes, Black Emerald illuminates green eyes. Smudge-resistant, all-day wear.