Lois Sasson was a jewelry designer and activist for gay rights and women’s rights. Ms. Sasson was part of a power couple in those arenas — her partner of 33 years was Lesley Gore, the singer of many1960s hits. Ms. Sasson never made the headlines for feminist and other causes she supported, but those who did viewed her as a vital presence. Ms. Sasson’s support for social justice causes was often reflected in her high-end jewelry, including bracelets that spelled out “Sisterhood Is Global” and “Visible and Powerful.” as well as early depictions of the AIDS ribbon in gold with proceeds going to Broadway Cares/Equity Fights AIDS. “We must come out to believe in something bigger than safe and comfortable lifestyles,” Ms. Sasson told Curve, the lesbian community magazine, in 2019. “Everyone has to look in the mirror and decide what it is they want to be remembered for.” Ms. Sasson died on Dec. 30, 2020 in Manhattan. She was 80. The cause was Covid-19.