This page of Mining Memorabilia contains images of some of the items I have collected over the years, not necessarily of Cornish Origin, but all are Mining related.
I have purchased these from various shops and ebay apart from the South Crofty Mine samples.
A sample of tin-bearing lode material from South Crofty Mine, Roskear No:1 North Lode, 360fm. The sample shows a typical composite vein structure and is composed of three easily identifiable segments. At the base is a segment of prussian blue tourmaline breccia (a breccia, in this case a hydrothermal breccia, is composed of fragments, blasted apart under very high pressure and resealed by fresh tourmaline coming out of solution) with minor amounts of quartz and cassiterite. Cassiterite (pale brown, tin dioxide, the main ore of tin) forms the segment above, which is also brecciated. Quartz (white) forms the bulk of the sample, but also shows a number of partings infilled with both tourmaline and cassiterite, indicating the lode was reactivated a number of times after the main tin-bearing segment was deposited, before cooling temperatures and loss of pressure stopped further pulses of mineralisation.
Green fluorite (Calcium Fluoride) from Reeve’s Lode, 400fm level, North Pool Zone, South Crofty Mine. Reeve’s Lode is a major caunter lode (trending roughly E-W) in the Camborne-Redruth District and is known from a number of mines, sometimes under different names. It cuts the earlier ‘right running’ lodes and tends to have a lower temperature assemblage of minerals than them also. In its upper levels. close to surface, it was incredibly rich in secondary (enriched) copper ores and was worked from the early 18th Century in the Pool Adit. In North Roskear Mine it was very rich in copper and zinc (not exploited) down to around the 200fm level where it became sub-economic. In South Crofty it was seen in the east of the mine (below East Pool & Agar mines) and was composed predominantly of fluorite of a variety of colours. The 400fm exposure was the lowest seen in the mine and composed of brilliant deep green and white fluorite. A large slab, originally collected by Nick LeBoutillier and christened ‘Eric’ (and why not?) was part of the geology department collection until the mine closed. After closure it was donated to the East Pool Taylor’s Shaft museum where it can still be seen today.
More details on the wreck can be found here: www.welshmines.org