A| Cornish Mine Terms |
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| Term | Definition | Examples |
| Acid Rock | A rock such as Granite containing a high amount of silica. | |
| Adit | An underground
term.A horizontal Tunnel from a mine opening out onto a hillside or valley
floor.
Used for drainage, access or to explore for lodes. |
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| Adventurer | The Partner or shareholder
in a Cornish mine.
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| Agent | Held overall authority for running mine on a day to day basis. | |
| Air Pump | A pump which drew condensate and air from the condenser of a steam engine. | |
| Angle Bob | A crank used to transfer a flat rods motion from horizontal to vertical. | |
| Arbors | The three shafts that carry the hand levers in the valve gear of a Cornish beam engine. | |
| Assessory | Additional minerals to the three main minerals of Granite. (Quartz, Felspar and Mica) | |
| Attle | Rock containing little or
no ore
Wherever possible trammed and tipped into an old Gunnis |
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| Azurite | Cu3(CO3)2(OH)2 a basic copper
carbonate formed by the corrosive action of air and water on other Copper
minerals. It is similar to the green tarnish that forms on pure copper.
Azurite in addition to being a copper ore is used as a gemstone and as a pigment. It is closely related to the green mineral malachite. Features
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