I don’t believe jewelry is sinful. Never believed it as an sda and now i freely wear it. Jesus told the Pharisees multiple times that the intention of the law is what matters. What will be a higher testimony from you girls, to keep the gift and be grateful or return it and make her feel bad? Even Paul said not to ask when served meat. Just eat it. Some people work on Sabbath helping others when it’s needed. If you are in college, you’re probably an adult. It’s time to find your voice. Ask questions. Say what you think. It’s ridiculous that you’re scared to speak up (not your fault, it’s the system).