Whiteworks, United Downs, Gwennap, Cornwall, England, UK

A piece of killas with a layer of quartz and bright brown cassiterite crystals. Some are very transparent. Collection and photo, Paul De Bondt.

© Collection and photo © 2018, Paul De Bondt

Cassiterite veinlet showing the classic matrix found in the Whiteworks Lode when it was cut by the Wheal Maid Decline. There is considerable rich but poorly crystallised cassiterite on the rear face of the specimen, but this aspect displays the structure and texture of the lode exceptionally well.

© Dale Foster Collection

Small isolated crystals, black, bright, on a matrix of quartzite. Some crystals are twinned. This spécimen is notified 'United Downs (mine)'. Ex collection Minéralogie Sorbonne, 1967. Collection JF LANOË / Inv. 0560-399

© Jean-François LANOE

Cassiterite from the Whiteworks Lode as cut by the Wheal Maid Decline project, showing characteristic matrix for the locality.

© Dale Foster collection

Unusually well formed and lustrous crystals of cassiterite from the Whiteworks stopes.

© Dale Foster collection

Typical example of the tin mineralisation found in the Whiteworks stope showing the characteristic pale coloured banded matrix with roughly formed crystalline cassiterite of a somewhat resinous lustre.

© Dale Foster collection

Transparent, slightly green scorodite crystals on massive cassiterite. Currently in my collection.

© Joshua Chambers Photo

Sky blue puffballs. Width of view 5mm. Stack of 45 images.

© Steve Sorrell

Unusually well formed and lustrous crystals of cassiterite from the Whiteworks stopes.

© Dale Foster collection

Cassiterite Var; Wood Tin. A small section of a nugget displaying the typical radiating pattern associated with this variety. N.B. Some of the crystalised specimens of Cassiterite from this location, showed the same pattern on certain faces of the crystals. This curiosity was the subject of a short study by Prof Ken Hosking ACSM, who ...

© R.Morton

Dark green, spherules forming a sort of crust on massive cassiterite. Possibly scorodite. Looks also very similar to chalcosiderite from Wheal Phoenix. Currently in my collection

© Joshua Chambers Photo

Green, opaque mineral on massive cassiterite with associated scorodite. Possibly malachite? Pseudomalachite? Chrysocolla? Currently in my collection

© Joshua Chambers Photo