Christian women are encouraged to focus on inner beauty—character, humility, and godliness—rather than external adornments like makeup and jewelry (1 Peter 3:3–5; 1 Timothy 2:9–10). At the same time, there is nothing inherently sinful about using makeup or jewelry, if seen and used appropriately. While God sees and values the condition of a person’s heart over outward appearances (1 Samuel 16:7b), our outward appearances still matter. Modesty and dressing according to the situations in which you find yourself still apply. Makeup and jewelry can be used to enhance dignity and show respect in appropriate settings, but they should not be the focus. A woman’s true worth is found in her faith and relationship with Christ. In every situation, a Christian woman should present herself in a way that reflects her identity as a child of God.
Beauty is fleeting (Proverbs 31:30), and God looks at the heart, but when interacting with the outside world, a God-following woman should dress for the situation. If it is a formal event, she may wear makeup and jewelry as a sign of respect for herself and recognition of her own dignity. If it is a more casual situation, the makeup and jewelry will probably be less ostentatious, so she won't draw attention to herself for the wrong reasons. Even if the woman can't afford nice jewelry or is allergic to makeup, she can show dignity in other ways like being clean, having a flattering hair style, or having an open, friendly demeanor.
We are children of the King. We are ambassadors for Christ. As such, we should always be dressed with the dignity and poise that the occasion calls for. Sometimes that may mean wearing makeup and jewelry, sometimes not. In every situation, however, we should present ourselves appropriately.