Grylls Bunny, Botallack Mine, Botallack, St Just, Cornwall, England, UK
Fine light brown Cassiterite in a course Tourmaline matrix from Grylls Bunny section of Botallack. Collected 2005.
© Please reference owner
Greyish-white crystal sections to 4mm in size embedded in a garnet rich, metabastie hornfelses. Collected from the western section of the workings below a horizonal band of tourmaline. Paul G. Oldfield collection
Massive greyish magnetite with pale brownish grossular garnet. The magnetite exhibits polarity and will attract particals of iron. The garnet was identified by XRF. Although it is worth mentioning that andradite is also identified in the eastern section of the workings. Paul G. Oldfield collection. For reference please see paper by N.J. ...
Fine terminated crystal from the western section of the workings. Crystal 18x9mm. Paul G. Oldfield collection
Single 5mm crystal embedded in tourmaline 'schorl'. Paul G. Oldfield collection.
Typical example of cassiterite from this location found at the base of a horizontal band of schorl. Paul G. Oldfield collection
Brown cassiterite in a matrix of black schorl and quartz. From the Grylls Bunny section of Botallack Mine.
© Dale Foster Collection
Thin veinlets of brown cassiterite cutting through a tourmaline rich matrix. Self collected several years ago from the Grylls Bunny.
© Dale Foster collection
Detail view of the cassiterite.
Outline plan of the Grylls Bunny workings made by Geevor technical services department in 1984 and re-drawn by Paul G. Oldfield in 2007
Tourmaline (schorl) dipping approximately 20 degrees northward with traces of cassiterite at the base. Photo Paul G. Oldfield
Workings looking westward, with access to inner workings. Photo Paul G. Oldfield
Adit driven in the late 18th century by John Tonkin of St. Just. At the time the workings were known as 'Grills's Bonny'. Photo Paul G. Oldfield
View of the entrance to one of the tunnels at Grylls Bunny
A general view of the pit showing the entrances to the shallow workings