JCK went trend-spotting at January’s VicenzaOro First fair: 1. Rose ring in 18k gold and enamel; $1,500; Graziella for Gold Expressions 2011, Arezzo, Italy; 39-05-753-2641; gruppograziella.it  2. Silver and 18k gold necklace with 0.61 ct. t.w. pyrite; $2,000; Leaderline for Blue White Group, Milan; 39-028-646-3546; leaderline.it   3. Bracelet in silver marcasite; $400; Nanis, Miami; 305-534-7669; nanis.it  4. 18k white gold celebration bracelet with 10 cts. t.w. diamonds; $60,000; Marco Bicego, San Francisco; 866-424-2346; marcobicego.com5. A 17 ct. smoky quartz with 3.30 cts. t.w. brown diamonds in 18k gold; $7,400; Garavelli, Valenza, Italy; 39-01-3194-1350; garavellialdo.it