Ethiopian Welo Rough Opal Top Grade Specimen - 16ct #04 

Ethiopian Crystal Opal specimen stone with radiant rainbow tones
Available on our website www.caldercrystals.com/produc...
Country of Origin: Ethiopia
10-point scale of mineral hardness: 5.5 - 6.5 (10 - Hard, 1 soft)
Treatment: Untreated, natural raw state Available at our etsy shop and website
www.etsy.com/uk/shop/CalderCr...
www.caldercrystals.com/?s=eth...