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Black opal cabochon set in an adjustable sterling silver ring with an eagle design
It can also be found in sedimentary environments
Pink and white agate with beautiful banding
Weight: 8 oz
Volcano Agate Dragon Head Rhodonite Black opal cabochon set inVolcano agate forms when lava from a volcanic eruption cools and creates cavities within the rock due to trapped gas bubbles. Groundwater rich in dissolved silica then percolates through these cavities, gradually depositing layers of silica that crystallize into agate over time, resulting in the distinctive banding patterns often seen in this gemstone. Weight: 21. 31 oz Size: appx 6. 85 inches long and 4. 75 inches tall