This statistic shows how ore quality in seleced commodities has declined between 2004 and 2009. In 2004, 2.22 carats were found per ton of diamond, while this figure had dropped to 1.84 in 2009.
Selected base metals ore-grade quality in existing mines from 2004 to 2009
Characteristic
2004
2009
Copper (%)
0.62
0.42
Zinc (%)
3.16
0.65
Nickel (%)
1.25
0.5
Gold (g/T)
1.4
0.82
Platinum (g/T)
4.07
3.51
Diamond (ct/T)**
2.22
1.84
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Accenture. (November 29, 2010). Selected base metals ore-grade quality in existing mines from 2004 to 2009 [Graph]. In Statista. Retrieved May 19, 2025, from https://www.statista.com/statistics/187611/base-metals-ore-grade-quality-in-existing-mines-from-2004/
Accenture. "Selected base metals ore-grade quality in existing mines from 2004 to 2009." Chart. November 29, 2010. Statista. Accessed May 19, 2025. https://www.statista.com/statistics/187611/base-metals-ore-grade-quality-in-existing-mines-from-2004/
Accenture. (2010). Selected base metals ore-grade quality in existing mines from 2004 to 2009. Statista. Statista Inc.. Accessed: May 19, 2025. https://www.statista.com/statistics/187611/base-metals-ore-grade-quality-in-existing-mines-from-2004/
Accenture. "Selected Base Metals Ore-grade Quality in Existing Mines from 2004 to 2009." Statista, Statista Inc., 29 Nov 2010, https://www.statista.com/statistics/187611/base-metals-ore-grade-quality-in-existing-mines-from-2004/
Accenture, Selected base metals ore-grade quality in existing mines from 2004 to 2009 Statista, https://www.statista.com/statistics/187611/base-metals-ore-grade-quality-in-existing-mines-from-2004/ (last visited May 19, 2025)
Selected base metals ore-grade quality in existing mines from 2004 to 2009 [Graph], Accenture, November 29, 2010. [Online]. Available: https://www.statista.com/statistics/187611/base-metals-ore-grade-quality-in-existing-mines-from-2004/
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