Description
A beautiful Goethite after Marcasite pseudomorph featuring sharply preserved crystal forms and a polished display face that highlights the specimen’s natural metallic lustre and internal texture. The polished surface reveals the rich iron‑oxide sheen characteristic of Yorkshire Goethite, while the remaining natural areas retain the rugged, earthy appearance typical of historic mining localities in the region.
This is a true pseudomorph, where the original Marcasite crystal structure has been completely replaced by Goethite while maintaining the original form. The result is a mineral with strong geological significance and excellent display aesthetics.
Goethite pseudomorphs after Marcasite are highly prized by collectors in Yorkshire, where historic mining districts produced some of the UK’s most recognisable iron sulphide replacements. Over centuries of natural oxidation, Marcasite transformed fully into Goethite, preserving the crystal architecture in remarkable detail.
Origin
This specimen originates from Yorkshire, UK, a region renowned for its historic mining spoil heaps across the Yorkshire Dales National Park. The most notable occurrences are found in the shallow dumps of Swaledale and Wensleydale, where long‑term weathering of iron sulphides created distinctive Goethite pseudomorphs after Marcasite.
Collectors value these Yorkshire specimens for their rarity, geological history, and the way they preserve the original Marcasite crystal shapes — making them some of the most iconic iron oxide pseudomorphs in the UK.
Finish
Natural, polished face, Freeform Specimen.
Dimensions
- 15cm x 11cm x 4cm at widest points (approximately)
- 0.746kg
Important Information
The item pictured is the exact item you will receive. Please pay attention to the actual size given in the listing as the pictures are generally enlarged to show details. Colour may be a little different due to the colour calibration of each individual monitor or light levels.
