https://www.etsy.com/au/listing/476996119/sz-85-natural-mesmerising-fire-opal

Gemstone: FIRE Opal genuine gemstone
Gemstone locality: North Africa
Hardness: 3-4 Mohs Scale
Gem size: 6 mm diameter
Head size: 18 mm diameter
Ring size: US Sz.8.5;  Australian & British Q 3/4
Ring weight: 3g
Metal: 925 Solid Sterling Silver

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