When choosing a present for mom, it is important to convey in it your love, respect and gratitude to your loved one. And it is not so important that the gift is expensive, as it is important that it brings a lot of joy and positiveness.
Recently my mom had a birthday. I found very nice hoop earrings
https://www.fjewellery.co.uk/en/earrings-hoop/
This is an inexpensive gift. But these earrings are very pretty. And I was happy to see the joy in my mother's eyes when she wore earrings