The best 2021 jewelry gifts and trends, according to London Jewelers

It’s p-a-r-t-y time at the dazzling, recently renovated London Jewelers flagship in Manhasset, LI. “We’re finally starting to celebrate again,” says Candy Udell, London’s president. “And to mark special occasions with beautiful things.”   Those new freedoms have led to a spike in demand. “It’s like coming out of hibernation,” she says. “We lost a…