Search results
Results from the WOW.Com Content Network
As a result, Cornwall was one of the most important mining areas in Europe until the early 20th century. It is thought that tin ore (cassiterite) was mined in Cornwall as early as the Bronze Age. [7] Over the years, many other metals (e.g. lead and zinc) have been mined in Cornwall. [8]
Cassiterite is a tin oxide mineral, SnO 2.It is generally opaque, but it is translucent in thin crystals.Its luster and multiple crystal faces produce a desirable gem. . Cassiterite was the chief tin ore throughout ancient history and remains the most important source of t
Cassiterite often accumulates in alluvial channels as placer deposits due to the fact that it is harder, heavier, and more chemically resistant than the granite in which it typically forms. [8] These deposits can be easily seen in river banks , because cassiterite is usually black or purple or otherwise dark, a feature exploited by early Bronze ...
Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...
Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE. "Say" for EG, used to mean "for example". More obscure clue words of this variety include: "Model" for T, referring to the Model T.
Smoke billows from the Kenneth Fire in West Hills, California, on Jan. 9, 2025. On Jan. 9, 2025, police announced one person was in custody after someone heard a suspect "was attempting to light a ...
Herodotus (430 BC) had only vaguely heard of the Cassiterides, "from which we are said to have our tin", but did not discount the islands as legendary. [2] Later writers—Posidonius, Diodorus Siculus, [3] Strabo [4] and others—call them smallish islands off ("some way off," Strabo says) the northwest coast of the Iberian Peninsula, which contained tin mines or, according to Strabo, tin and ...
cassiterite Creator Alchemist-hp. Support as nominator — Mae din \ talk 07:15, 6 April 2010 (UTC) Weak support-- nice picture, but there is quite a lot of noise in the darker areas. I think this problem was made worse in the uploader's second version of the picture, in which he/she attempted to brighten the picture.