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Magnesita – Fuente de magnesio
Add 12 high-quality pieces to your collection
Porphyry - Madrid
Discover and learn with authentic Minerals
This collection is the continuation of the Premium Collection of metallic ores
Obsidiana Negra XL Pez fósil Magnesita – Fuente de magnesioRock Class igneous rock Rock Subclass Volcanic (volcanic glass) Origin Hidalgo, Mexico Size Medium: 3. 00 4. 00 cm Large: 4. 00 5. 00 cm Obsidian, or volcanic glass, is molten lava that has cooled rapidly. Its composition is mainly of silicic oxides, being very similar to that of granite or rhyolite. The piece you receive may differ slightly from the photo shown as the rocks are natural and no piece is identical. The size is approximate.
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