TUCSON The 2019 Tucson gem shows were defined by larger conversations about ethical mining. Gem Legacy, a nonprofit that seeks to support East African mining communities, debuted officially at JCK Tucson and urged the industry to get involved. Designers were likewise eager to discuss gemstone provenance, from Petra Class’ collection of minty aqua­marines custom-cut in Jaipur, India, to the 10.5 ct. green beryl—hand-picked from a Tanzania mine—in Debra Navarro’s JCK Tucson Design Challenge–winning Vincent ring. As for trends, opals remain infinitely in demand, and emeralds are still on fire. Tourmalines were twinkling everywhere, and rhodochrosite has officially landed on our radar. Get ready. Above: Rough Tourmaline bracelet in 18k and 22k gold; $15,500; Petra Class; petra.class@gmail.com; petraclassdesign.com   AWARDS A Star Is Born actress/songwriter Lady Gaga ma