| · | [Tungsten]Market Price of Tungsten Concentrates in China | 1/1/2020 |
| · | [Tungsten]Market Price of Ferrotungsten70% in China | 1/1/2020 |
| · | [Tungsten]Market Price of AmmoniumParatungstate in China | 1/1/2020 |
| · | [Tungsten]Market Price of Tungsten Concentrates in China | 12/31/2019 |
| · | [Tungsten]Market Price of Ferrotungsten70% in China | 12/31/2019 |
| · | [Tungsten]Market Price of AmmoniumParatungstate in China | 12/31/2019 |
| · | [Tungsten]Market Price of Tungsten Concentrates in China | 12/30/2019 |
| · | [Tungsten]Market Price of Ferrotungsten70% in China | 12/30/2019 |
| · | [Tungsten]Market Price of AmmoniumParatungstate in China | 12/30/2019 |
| · | [Tungsten]Market Price of Tungsten Concentrates in China | 12/27/2019 |
| · | [Tungsten]Market Price of Ferrotungsten70% in China | 12/27/2019 |
| · | [Tungsten]Market Price of AmmoniumParatungstate in China | 12/27/2019 |
| · | [Tungsten]Market Price of Tungsten Concentrates in China | 12/26/2019 |
| · | [Tungsten]Market Price of Ferrotungsten70% in China | 12/26/2019 |
| · | [Tungsten]Market Price of AmmoniumParatungstate in China | 12/26/2019 |