Commodity |
Description |
| Coal |
A combustible, organoclastic, sedimentary rock containing >50% by weight of carboneceous material and moisture and composed mainly of lithified plant remains. |
| Diamond |
A naturally occurring, high-pressure form of Carbon, valued as an industrial mineral because of its hardness and as a gem. Diamonds ultimately derive from kimberlite and lamproite and form placer deposits. |
| General |
The following glossary contains definitions of certain technical terms. |
| Gold |
A soft, yellow and corrossion-resistant element. It is one of the most malleable and ductile metals occurring in veins and alluvial deposits. |
| Nickel |
A silver-white, hard, yet malleable metallic element capable of a high polish and resistant to corrosion that is chiefly used in alloys and as a catalyst. |
