{"id":115,"date":"2025-10-21T21:54:05","date_gmt":"2025-10-21T21:54:05","guid":{"rendered":"https:\/\/bergslagenmetals.com\/?p=115"},"modified":"2025-11-15T16:24:33","modified_gmt":"2025-11-15T16:24:33","slug":"how-is-alum-shale-different-from-other-rocks-mined-in-sweden","status":"publish","type":"post","link":"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/","title":{"rendered":"How is Alum Shale different from other rocks mined in Sweden?"},"content":{"rendered":"\n<p>Most Swedish mines extract ore from hard crystalline rock, whereas alum shale is softer and contains numerous metals and minerals dispersed throughout. It also contains sulphides and weakly radioactive elements.<\/p>\n\n\n\n<p><strong>Sources:<\/strong> Plat\u00e5bergens\u00a0Geopark, &#8220;Alunskiffern&#8221;,\u00a0<a href=\"https:\/\/www.platabergensgeopark.se\/wp-content\/uploads\/2022\/10\/Faktablad-%E2%80%93-Alunskiffern-Plata%CC%8Abergens-Geopark2.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.platabergensgeopark.se\/wp-content\/uploads\/2022\/10\/Faktablad-%E2%80%93-Alunskiffern-Plata%CC%8Abergens-Geopark2.pdf<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Most Swedish mines extract ore from hard crystalline rock, whereas alum shale is softer and contains numerous metals and minerals dispersed throughout. It also contains sulphides and weakly radioactive elements. Sources: Plat\u00e5bergens\u00a0Geopark, &#8220;Alunskiffern&#8221;,\u00a0https:\/\/www.platabergensgeopark.se\/wp-content\/uploads\/2022\/10\/Faktablad-%E2%80%93-Alunskiffern-Plata%CC%8Abergens-Geopark2.pdf<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[12],"tags":[],"class_list":["post-115","post","type-post","status-publish","format-standard","hentry","category-mining-waste-management"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How is Alum Shale different from other rocks mined in Sweden? - Bergslagen Metals<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How is Alum Shale different from other rocks mined in Sweden? - Bergslagen Metals\" \/>\n<meta property=\"og:description\" content=\"Most Swedish mines extract ore from hard crystalline rock, whereas alum shale is softer and contains numerous metals and minerals dispersed throughout. It also contains sulphides and weakly radioactive elements. Sources: Plat\u00e5bergens\u00a0Geopark, &#8220;Alunskiffern&#8221;,\u00a0https:\/\/www.platabergensgeopark.se\/wp-content\/uploads\/2022\/10\/Faktablad-%E2%80%93-Alunskiffern-Plata%CC%8Abergens-Geopark2.pdf\" \/>\n<meta property=\"og:url\" content=\"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/\" \/>\n<meta property=\"og:site_name\" content=\"Bergslagen Metals\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-21T21:54:05+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-15T16:24:33+00:00\" \/>\n<meta name=\"author\" content=\"ohajgiejlg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"ohajgiejlg\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/\"},\"author\":{\"name\":\"ohajgiejlg\",\"@id\":\"https:\/\/bergslagenmetals.com\/en\/#\/schema\/person\/aaab76edb45d94b8bbf5c343e8564303\"},\"headline\":\"How is Alum Shale different from other rocks mined in Sweden?\",\"datePublished\":\"2025-10-21T21:54:05+00:00\",\"dateModified\":\"2025-11-15T16:24:33+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/\"},\"wordCount\":58,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/bergslagenmetals.com\/en\/#organization\"},\"articleSection\":[\"Mining &amp; Waste Management\"],\"inLanguage\":\"en-CA\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/\",\"url\":\"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/\",\"name\":\"How is Alum Shale different from other rocks mined in Sweden? 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It also contains sulphides and weakly radioactive elements. Sources: Plat\u00e5bergens\u00a0Geopark, &#8220;Alunskiffern&#8221;,\u00a0https:\/\/www.platabergensgeopark.se\/wp-content\/uploads\/2022\/10\/Faktablad-%E2%80%93-Alunskiffern-Plata%CC%8Abergens-Geopark2.pdf","og_url":"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/","og_site_name":"Bergslagen Metals","article_published_time":"2025-10-21T21:54:05+00:00","article_modified_time":"2025-11-15T16:24:33+00:00","author":"ohajgiejlg","twitter_card":"summary_large_image","twitter_misc":{"Written by":"ohajgiejlg","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/#article","isPartOf":{"@id":"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/"},"author":{"name":"ohajgiejlg","@id":"https:\/\/bergslagenmetals.com\/en\/#\/schema\/person\/aaab76edb45d94b8bbf5c343e8564303"},"headline":"How is Alum Shale different from other rocks mined in Sweden?","datePublished":"2025-10-21T21:54:05+00:00","dateModified":"2025-11-15T16:24:33+00:00","mainEntityOfPage":{"@id":"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/"},"wordCount":58,"commentCount":0,"publisher":{"@id":"https:\/\/bergslagenmetals.com\/en\/#organization"},"articleSection":["Mining &amp; Waste Management"],"inLanguage":"en-CA","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/","url":"https:\/\/bergslagenmetals.com\/en\/how-is-alum-shale-different-from-other-rocks-mined-in-sweden\/","name":"How is Alum Shale different from other rocks mined in Sweden? 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