The Bargiolina, a Striking Historical Stone from Monte Bracco (Piedmont, NW Italy) and a Possible Source of Industrial Minerals
Abstract
1. Introduction
2. Materials and Methods
3. Geological Framework
4. Exploitation Setting
5. Commercial Varieties, Mineralogy, Petrography, Physical and Technical Properties
6. Discussion and Perspectives: Sustainable Mining of the Mineral Resources of the Monte Bracco Area
Author Contributions
Funding
Conflicts of Interest
References
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“Golden” Quartzite | Pale Yellow | Olive Green | Marmorina | Kaolinitic Gneiss | |
---|---|---|---|---|---|
Quartz | 90–95 | 85–90 | 85–90 | 70–80 | 50–70 |
Phengite | 2–6 | 2–8 | 5–10 | 10–15 | 5–15 |
K-feldspar | 1–2 | 1–5 | 2–5 | 2–10 | <LOD |
Plagioclase | 1–2 | 1–2 | 2–4 | 2–4 | <LOD |
Chlorite | <LOD | <LOD | traces | traces | 3–8 |
Kaolin | <LOD | <LOD | traces | traces | 8–35 |
On Average [5] | Marmorina [6] | “Golden” Quartzite [6] | |
---|---|---|---|
Bulk density (kg/m3) | 2579 | 2695 | 2695 |
Water absorption coefficient (%) | 0.21 | 0.28 | 0.30 |
Flexural strength (MPa) | 40.5 | 55.5 | 42.3 |
Impact strength (J) | n.a. | 7.4 | 7.4 |
Impact strength (cm) | 102 | n.a. | n.a. |
Knoop microhardness (MPa) | n.a. | 9010 | 9021 |
Abrasion resistance (coefficient) | 0.67 | n.a. | n.a. |
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Cavallo, A.; Dino, G.A. The Bargiolina, a Striking Historical Stone from Monte Bracco (Piedmont, NW Italy) and a Possible Source of Industrial Minerals. Sustainability 2019, 11, 4293. https://doi.org/10.3390/su11164293
Cavallo A, Dino GA. The Bargiolina, a Striking Historical Stone from Monte Bracco (Piedmont, NW Italy) and a Possible Source of Industrial Minerals. Sustainability. 2019; 11(16):4293. https://doi.org/10.3390/su11164293
Chicago/Turabian StyleCavallo, Alessandro, and Giovanna Antonella Dino. 2019. "The Bargiolina, a Striking Historical Stone from Monte Bracco (Piedmont, NW Italy) and a Possible Source of Industrial Minerals" Sustainability 11, no. 16: 4293. https://doi.org/10.3390/su11164293
APA StyleCavallo, A., & Dino, G. A. (2019). The Bargiolina, a Striking Historical Stone from Monte Bracco (Piedmont, NW Italy) and a Possible Source of Industrial Minerals. Sustainability, 11(16), 4293. https://doi.org/10.3390/su11164293