Corsi's classification: | Class 14. Quartz and its varieties; Species 3. Petrified wood |
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Corsi's text: | 180.6 Legni pietrificati |
Corsi's classification: | Class 14. Quartz and its varieties; Species 3. Petrified wood |
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Corsi's text: | 180.6 Legni pietrificati |