{"id":2005,"date":"2025-09-02T13:47:13","date_gmt":"2025-09-02T16:47:13","guid":{"rendered":"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/?p=2005"},"modified":"2025-10-24T13:20:12","modified_gmt":"2025-10-24T16:20:12","slug":"especularita-hematita","status":"publish","type":"post","link":"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/especularita-hematita\/","title":{"rendered":"Especularita"},"content":{"rendered":"\n<p class=\"has-black-color has-text-color has-medium-font-size\">A especularita (Fe\u2082O\u2083) \u00e9 uma variedade met\u00e1lica de hematita que cristaliza no sistema trigonal, formando cristais tabulares ou lamelares, frequentemente agregados maci\u00e7os ou foliados, com apar\u00eancia met\u00e1lica caracter\u00edstica. Apresenta cor cinza met\u00e1lico a negro brilhante, brilho met\u00e1lico, dureza de 5,5\u20136,5, densidade relativa de 5,2\u20135,3, clivagem imperfeita e fratura irregular. Forma-se em dep\u00f3sitos hidrotermais, magm\u00e1ticos e rochas metam\u00f3rficas ricas em ferro, resistindo bem ao intemperismo e ocorrendo tamb\u00e9m em dep\u00f3sitos aluvionares. \u00c9 fonte de ferro na siderurgia, estudada em mineralogia de ferro e hematitas met\u00e1licas, e seus cristais brilhantes s\u00e3o valorizados por colecionadores; raramente usados como gemas. Ocorre no Brasil (Minas Gerais, Quadril\u00e1tero Ferr\u00edfero; Goi\u00e1s), Alemanha (Harz), \u00c1ustria (Tirol), Estados Unidos (Nova Jersey, Alabama), It\u00e1lia (Elba) e Su\u00e9cia (Kiruna).<\/p>\n\n\n\n<div class=\"minerais-content\">\n<style>\n  \/* Quadradinhos na cor #9c5932 *\/\n  .minerais-content ul.custom-square {\n    list-style-type: none;\n    padding-left: 4em;\n  }\n  .minerais-content ul.custom-square li {\n    position: relative;\n    color: black;\n    margin-bottom: 0.3em;\n  }\n  .minerais-content ul.custom-square li::before {\n    content: \"\u25a0\";\n    color: #9c5932;\n    position: absolute;\n    left: -2.5em;\n    font-size: 1em;\n    top: 0;\n  }\n  \/* Setinha \u25ba antes dos t\u00edtulos *\/\n  .minerais-content .with-arrow::before {\n    content: \"\u25ba\";\n    color: #9c5932;\n    margin-right: 0.4em;\n  }\n  \/* Texto preto e tamanhos *\/\n  .minerais-content p,\n  .minerais-content span,\n  .minerais-content strong,\n  .minerais-content ul,\n  .minerais-content li,\n  .minerais-content td {\n    color: black !important;\n    font-size: 0.95em;\n  }\n  \/* Tabela com espa\u00e7amento interno m\u00ednimo e bordas #9c5932 *\/\n  .minerais-content table.property-table {\n    width: 100%;\n    border-collapse: collapse;\n    margin-bottom: 2em;\n    border: 1.5px solid #9c5932;\n  }\n  .minerais-content table.property-table td {\n    vertical-align: middle;\n    padding: 0.05em 0.1em;\n    text-align: justify;\n    border: 1px solid #9c5932;\n  }\n  .minerais-content table.property-table td:first-child {\n    font-weight: bold;\n    white-space: nowrap;\n    color: black;\n    position: relative;\n    text-align: left;\n  }\n  .minerais-content table.property-table \ntd:first-child::before {\n    content: \"\u25ba\";\n    color: #9c5932;\n    margin-right: 0.4em;\n  }\n  .minerais-content hr.custom-divider {\n    border: none;\n    border-top: 3px solid #9c5932;\n    margin: 2em 0;\n  }\n<\/style>\n\n\n\n<hr class=\"custom-divider\">\n\n<table class=\"property-table\">\n  <tr>\n    <td>Classe<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>\u00d3xidos<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Grupo<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Hematita (variedade met\u00e1lica de ferro)<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Composi\u00e7\u00e3o Qu\u00edmica<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Fe\u2082O\u2083<br>\n          <span style=\"font-size: 0.9em;\">(\u00f3xido de ferro III)<\/span>\n        <\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Sistema Cristalino<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Trigonal<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>H\u00e1bito<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Cristais tabulares ou lamelares<\/li>\n        <li>Frequentemente em agregados maci\u00e7os ou foliados; apar\u00eancia met\u00e1lica muito caracter\u00edstica<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Cor<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Cinza met\u00e1lico a negro brilhante<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Brilho<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Met\u00e1lico<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Dureza (Mohs)<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>5,5 \u2013 6,5<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Densidade Relativa<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>5,2 \u2013 5,3<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Clivagem<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Imperfeita<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Fratura<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Irregular<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n<\/table>\n\n<hr class=\"custom-divider\">\n\n<p style=\"margin-bottom: 1.3em;\">\n  <strong class=\"with-arrow\" style=\"font-size: 1.1em; display: inline;\">Origem<\/strong>\n  <span>\n    Variedade de hematita met\u00e1lica, formada principalmente em dep\u00f3sitos hidrotermais e magm\u00e1ticos, bem como em rochas metam\u00f3rficas ricas em ferro. Resistente ao intemperismo e presente tamb\u00e9m em dep\u00f3sitos aluvionares.\n  <\/span>\n<\/p>\n\n<p class=\"with-arrow\" style=\"margin-bottom: 0.8em; font-size: 1.1em; font-weight: bold; display: block;\">Usos<\/p>\n<ul class=\"custom-square\" style=\"line-height: 1.8;\">\n  <li><strong>Industrial<\/strong> \u2013 Fonte de ferro, usada na siderurgia.<\/li>\n  <li><strong>Cient\u00edfico<\/strong> \u2013 Estudo de minerais de ferro e forma\u00e7\u00e3o de hematitas met\u00e1licas em diferentes contextos geol\u00f3gicos.<\/li>\n  <li><strong>Gemol\u00f3gico<\/strong> \u2013 Cristais bem formados e brilhantes s\u00e3o apreciados em cole\u00e7\u00f5es mineral\u00f3gicas; raramente usados como gema.<\/li>\n  <li><strong>Outros<\/strong> \u2013 Valorizada em cole\u00e7\u00f5es devido ao brilho met\u00e1lico intenso e superf\u00edcies reflexivas.<\/li>\n<\/ul>\n\n<p class=\"with-arrow\" style=\"margin-bottom: 0.8em; font-size: 1.1em; font-weight: bold; display: block;\">Localiza\u00e7\u00f5es T\u00edpicas<\/p>\n<ul class=\"custom-square\" style=\"line-height: 1.8;\">\n  <li><strong>Brasil<\/strong> \u2013 Minas Gerais (Quadril\u00e1tero Ferr\u00edfero), Goi\u00e1s<\/li>\n  <li><strong>Alemanha<\/strong> \u2013 Harz<\/li>\n  <li><strong>\u00c1ustria<\/strong> \u2013 Tirol<\/li>\n  <li><strong>Estados Unidos<\/strong> \u2013 Nova Jersey, Alabama<\/li>\n  <li><strong>It\u00e1lia<\/strong> \u2013 Elba<\/li>\n  <li><strong>Su\u00e9cia<\/strong> \u2013 Kiruna (associada a hematita met\u00e1lica)<\/li>\n<\/ul>\n\n<hr class=\"custom-divider\">\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-2.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2006\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-2-1024x1024.png\" alt=\"\" class=\"wp-image-2006\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-2-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-2-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-2-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-2-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-2-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-2-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-2.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-3.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2019\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-3-1024x1024.png\" alt=\"\" class=\"wp-image-2019\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-3-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-3-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-3-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-3-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-3-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-3-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-3.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-4.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2008\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-4-1024x1024.png\" alt=\"\" class=\"wp-image-2008\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-4-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-4-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-4-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-4-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-4-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-4-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-4.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-5.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2009\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-5-1024x1024.png\" alt=\"\" class=\"wp-image-2009\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-5-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-5-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-5-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-5-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-5-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-5-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-5.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-6.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2007\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-6-1024x1024.png\" alt=\"\" class=\"wp-image-2007\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-6-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-6-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-6-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-6-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-6-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-6-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-6.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-7.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2010\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-7-1024x1024.png\" alt=\"\" class=\"wp-image-2010\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-7-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-7-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-7-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-7-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-7-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-7-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-7.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-8.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2011\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-8-1024x1024.png\" alt=\"\" class=\"wp-image-2011\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-8-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-8-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-8-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-8-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-8-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-8-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-8.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-9.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2012\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-9-1024x1024.png\" alt=\"\" class=\"wp-image-2012\" 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href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-10.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2013\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-10-1024x1024.png\" alt=\"\" class=\"wp-image-2013\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-10-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-10-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-10-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-10-768x768.png 768w, 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href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita.png\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" data-id=\"2018\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-300x300.png\" alt=\"\" class=\"wp-image-2018\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Especularita-200x200.png 200w, 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