The European Union on Monday adopted a new package of sanctions on Russia that include an import ban on Russian diamonds, officials said. The package is the 12th packet leveled at Moscow since it sent Russian troops into Ukraine on Feb. 24, 2022, in a full-scale invasion. They are designed to reduce Russia’s access to revenues, metals and technology used to sustain its war effort. The latest round of sanctions was settled last Friday by envoys from the 27 EU member countries but not formally adopted because of an objection from Austria that was subsequently lifted. “We continue to stand with U…