New York City Ballet, Jewels (New York State Theater, Lincoln Center, June 21, 23, 24). Five performances of George Balanchine’s “full-length, three-act plotless ballet,” which is really three separate, sharply contrasted ballets set to the music of Fauré, Stravinsky, and Tchaikovsky. “Rubies” is a virtuoso romp and “Diamonds” a stately, resplendent delight, but “Emeralds” is the true gem, a hauntingly lyrical meditation on love and loss (TT).