Choose Peruvian Opal (pink) or Rutile Quartz (black or yellow).Rutile Quartz is a unique version of Quartz, where is has black or yellow streaks of rutile inside, giving it an additional dimension of color. Yellow rutile gives the stone strips of golden yellow color. Each teardrop is about 9mm wide and 9mm tall. And the black rutile similarly has black strips inside the clear quartz. Each teardrop is about 12mm wide and 15mm long.