{"id":4295,"date":"2013-04-03T17:00:28","date_gmt":"2013-04-03T23:00:28","guid":{"rendered":"http:\/\/sanuja.com\/blog\/?p=4295"},"modified":"2013-04-07T16:45:07","modified_gmt":"2013-04-07T22:45:07","slug":"ore-minerals-and-rocks","status":"publish","type":"post","link":"https:\/\/sanuja.com\/blog\/ore-minerals-and-rocks","title":{"rendered":"Ore Minerals and Rocks"},"content":{"rendered":"
\"Different<\/a>
Different types of pyrites.<\/figcaption><\/figure>\n

Arsenopyrite<\/strong><\/h2>\n

\"311_rx_Arsenopyrite\"<\/a>\"311_rx_Arsenopyrite_2\"<\/a>\"311_rx_Arsenopyrite_3\"<\/a><\/p>\n

Not and ore, but common sulphide associated with ores Usually granular masses of a silvery or whitish-grey. H (5.5-6), very heavy with good cleavage, metallic luster brighter than pyrite or pyrrhotite. Black streak that smells slightly of garlic.<\/p>\n

Asbestos\u00a0(serpentine)<\/strong><\/h2>\n

\"311_rx_Asbestos_3\"<\/a>\"311_rx_Asbestos\"<\/a>\"311_rx_Asbestos_2\"<\/a><\/p>\n

Industrial\u00a0mineral\u00a0(insulation)\u00a0<\/p>\n

Azurite<\/strong><\/h2>\n

\"311_rx_Azurite_Malachite\"<\/a>\"311_rx_Azurite_Malachite_2\"<\/a>\"311_rx_Azurite_Malachite_3\"<\/a><\/p>\n

Copper\u00a0indicator\u00a0mineral\u00a0(rarely\u00a0ore). Hydrous copper carbonate, bright azure blue, heavy, semi-hard (3.5-4) with pale blue streak. Commonly occurs as a film or earthy granular or concretionary masses.<\/p>\n

Bornite<\/strong><\/h2>\n

\"311_rx_Bornite\"<\/a><\/p>\n

Copper (Cu)\u00a0ore. Brownish-purple compact granular masses (rarely cubic) which are usually tarnished to an irridescent purple and blue film (peacock ore). Soft (3), very heavy and fragile with good cleavage, metallic luster.<\/p>\n

Chalcopyrite<\/strong><\/h2>\n

\"311_rx_Chalcopyrite\"<\/a>\"311_rx_Chalcopyrite_2\"<\/a>\"311_rx_Chalcopyrite_3\"<\/a><\/p>\n

Copper (Cu)\u00a0ore. Dark or brassy-yellow often with an irridescent film (bright greens, reds, blues in contrast to the deep purple of bornite). Generally granular masses, H (3.5-4), heavy, no cleavage, conchoidal fracture with metallic to semi-metallic luster. Greenish-black streak.<\/p>\n

Chromite<\/strong><\/h2>\n

\"311_rx_Chromite\"<\/a><\/p>\n

Chromium (Cr) ore. Black, granular masses with a vaguely glassy luster compared with magnetite and ilmenite. Heavy, hard (5.5), no cleavage, dark brown streak.<\/p>\n

Galena<\/strong><\/h2>\n

\"311_rx_Galena\"<\/a><\/p>\n

Lead (Pb) ore. Hardness of 2 to 3 making it very soft. Cubic crystals with prefect or almost perfect cleavage. High density rock with a bright metallic luster and dark grey streak. Usually found as compact granular masses.<\/p>\n

Goetite\/\u00a0Limonite<\/strong><\/h2>\n

\"311_rx_Goetite\"<\/a><\/p>\n

Iron\u00a0ore\u00a0and\u00a0iron\u00a0indicator\u00a0mineral\u00a0<\/p>\n

Graphite<\/strong><\/h2>\n

\"311_rx_Graphite\"<\/a>
\nIndustrial\u00a0mineral\u00a0(lubricant,\u00a0thermal\u00a0conductor)<\/p>\n

Hematite<\/strong><\/h2>\n

\"311_rx_Hematite\"<\/a>\"311_rx_Hematite_2\"<\/a>\"311_rx_Hematite_3\"<\/a><\/p>\n

Iron\u00a0ore. It is possible to find hematitle in silver colour in nature. The best method to identify them is to use the colour of the streak which is red.<\/p>\n

Ilmenite<\/strong><\/h2>\n

\"311_rx_Ilmenite\"<\/a>\"311_rx_Ilmenite_2\"<\/a><\/p>\n

Titanium\u00a0ore. Locally very weakly magnetic, blackish granular masses with dull submetallic luster. Heavy, H (5-6), no cleavage, black to brownish-red streak.<\/p>\n

Limonite<\/strong><\/h2>\n

\"311_rx_Limonite\"<\/a><\/p>\n

Magnetite<\/strong><\/h2>\n

Iron (Fe)\u00a0ore. Highly magnetic, iron-black, granular masses with dull submetallic luster and blueish irridescence. Very heavy, H (5.5-6), no cleavage, black streak.<\/p>\n

Malachite<\/strong><\/h2>\n

Copper\u00a0indicator\u00a0mineral\u00a0(rarely\u00a0ore). Emerald-green-pale green film or rarely acicular fibrous crystals. H (3.5-4), sometimes silky luster, light green streak.<\/p>\n

Molybdenite<\/strong><\/h2>\n

\"311_rx_Molybdenum\"<\/a>\"311_rx_Molybdenum_2\"<\/a><\/p>\n

Industrial\u00a0mineral\u00a0(lubricant)\u00a0and\u00a0molybdenum<\/p>\n

Native\u00a0Copper<\/strong><\/h2>\n

\"311_rx_Copper\"<\/a><\/p>\n

Copper (Cu)\u00a0ore. Soft (2.5-3) copper-red, very heavy, ductile and malleable with a hackly fracture, metallic luster. Occurs in compact or dendritic masses. Often has a greenish film of malachite.<\/p>\n

Pyyrhotite<\/strong><\/h2>\n

\"311_rx_Pyyrhotite_2\"<\/a>\"311_rx_Pyyrhotite\"<\/a><\/p>\n

Not\u00a0and\u00a0ore,\u00a0but\u00a0common\u00a0sulphide\u00a0associated\u00a0with\u00a0ores. Usually magnetic, not as strong as magnetite. Bronze-silvery and duller than pyrite, massive, granular aggregates, sometimes irridescent. Very heavy, H (3.5-4.5), fragile with parting, bright metallic luster.<\/p>\n

Pyrite<\/strong><\/h2>\n

\"311_rx_Pyrite\"<\/a>\"311_rx_Pyrite_2\"<\/a>\"311_rx_Pyrite_3\"<\/a><\/p>\n

Not\u00a0and\u00a0ore,\u00a0but\u00a0common\u00a0sulphide\u00a0associated\u00a0with\u00a0ores. striated cubic or sometimes octahedarl crystals but more commonly granular aggregates with bright metallic luster and a fairly brassy-yellow, H (6-6.5), greenish-black streak.<\/p>\n

Sphalerite<\/strong><\/h2>\n

\"311_rx_Sphalerite\"<\/a><\/p>\n

Zinc (Zn)\u00a0ore. Hardness of about 3 – 4.5. Pale yellow-brown streak, very variable from yellow or reddish brown to blackish (with high iron) to colourless. Heavy, fragile with perfect cleavage parallel to crystal faces. Usually has a waxy to resinous luster and can be transparent.<\/p>\n

References:<\/strong>
\nGeology 311 Lab Manual, University of Calgary<\/p>\n","protected":false},"excerpt":{"rendered":"

Arsenopyrite Not and ore, but common sulphide associated with ores<\/p>\n","protected":false},"author":2,"featured_media":4313,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[17],"tags":[8,23],"class_list":["post-4295","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-earth-science","tag-academic","tag-geology"],"jetpack_featured_media_url":"https:\/\/sanuja.com\/blog\/wp-content\/uploads\/2013\/04\/311_rx_Azurite_Malachite_2.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/posts\/4295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/comments?post=4295"}],"version-history":[{"count":0,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/posts\/4295\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/media\/4313"}],"wp:attachment":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/media?parent=4295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/categories?post=4295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/tags?post=4295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}