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This is a clear quartz (SiO2) with phantom-like layers of hematite (Fe2O3) included in the crystal along with a secondary layer of overgrowth on parts of the quartz
This item weighs is
5" and weighs 4
from the early Cambrian to the end of the Permian period
Velvet Malachite | Congo Extra Large This is a clear quartzThis specimen features rich, deep green malachite with the classic velvet texture for which Congo malachite is renowned. Formed as a secondary copper mineral, malachite develops its soft, fibrous surface and swirling botryoidal patterns as copper rich solutions alter surrounding rock. This item is 3 x 1. 5 and weighs 2. 85 oz.
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