You can purchase from Aleshia (I can't remember her name correctly). It will be available to purchase after you build level 2 house as I remembered. She will come to you at night to let you know. Anyway. you can purchase 1 ring per time after you build level 3 and each ring will cost 100k. I definitely remember this was discuss some where inside this thread in the past and it will good if try to read through. Thanks.