Etsy – EKJsNatural Wonders
https://www.etsy.com/listing/663313018/one-tumbled-banded-carnelian-aka-sard
https://www.etsy.com/shop/EKJsNaturalWonders/items/?search_query=sardonyx
Alternative August Birthstone Sardonyx Crystals
Polished Sardonyx Crystals from EKJsNatural Wonders