{"id":82867,"date":"2020-05-27T12:10:42","date_gmt":"2020-05-27T17:10:42","guid":{"rendered":"https:\/\/www.detroitja.com\/?p=82867"},"modified":"2024-01-30T16:05:58","modified_gmt":"2024-01-30T22:05:58","slug":"effects-of-chromium-in-ruby-emerald-and-alexandrite","status":"publish","type":"post","link":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/","title":{"rendered":"Effects of Chromium in Ruby, Emerald and Alexandrite"},"content":{"rendered":"<p>Certain chemical elements are responsible for body color in varying gem materials. Chromium is a chromophore responsible for the bright red of ruby and the bright green of emerald (Douma, 2017). The type, number, and arrangement of atoms in gemstones can affect what our brain interprets as color. It is very common for the same transition elements in gemstones to produce differing effects in different environments (Gem-A, 2009).<\/p>\n<h2><strong>Ruby<\/strong><\/h2>\n<p>The rich red color of ruby, Al2O3 , is due to an impurity within the aluminum oxide crystal structure. Traces of chromium (Cr3+), replace aluminum (Al3+), about one atom of aluminum per hundred is replaced by a chromium in ruby (Sicree,2007).<\/p>\n<figure id=\"attachment_83328\" aria-describedby=\"caption-attachment-83328\" style=\"width: 562px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-83328 size-full\" src=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/ruby.jpg\" alt=\"\" width=\"562\" height=\"387\" srcset=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/ruby.jpg 562w, https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/ruby-300x207.jpg 300w\" sizes=\"(max-width: 562px) 100vw, 562px\" \/><figcaption id=\"caption-attachment-83328\" class=\"wp-caption-text\"><center>Image courtesy of John Harris gemlab.co.uk<\/center><\/figcaption><\/figure>\n<p>There is a broad absorption band in the green to yellow that diminishes the transmission of green to yellow light and results in the transmission of red light in ruby spectrum. Ruby has an absorption band around 550nm due to chromium.<\/p>\n<h2><strong>Emerald<\/strong><\/h2>\n<p>Emerald is a variety of the mineral <em>beryl<\/em>, Be3Al2Si6O18. The chromium ion (Cr3+) replaces aluminum (Al3+) in the mineral\u2019s structure, very similar to that in ruby. Slight differences in the bond strengths between ruby and emerald result in shifts in the absorption and transmission bands.<\/p>\n<figure id=\"attachment_83333\" aria-describedby=\"caption-attachment-83333\" style=\"width: 552px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-83333 size-full\" src=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/emerald.jpg\" alt=\"\" width=\"552\" height=\"400\" srcset=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/emerald.jpg 552w, https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/emerald-300x217.jpg 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><figcaption id=\"caption-attachment-83333\" class=\"wp-caption-text\"><center>Image courtesy of John Harris gemlab.co.uk<\/center><\/figcaption><\/figure>\n<p>There is a slightly weaker absorption from the yellow to the red in emerald. Consequently, this sort of absorption diminishes the transmission of red light and has a resultant transmission of blue\/green light. Emerald\u2019s chromium line is around 600nm.<\/p>\n<h2><strong>Alexandrite<\/strong><\/h2>\n<p>Alexandrite and other gems that exhibit a color change effect depend delicately on the balance of the transmitted light. Daylight contains high proportions of blue and green light; while incandescent light contains a higher balance of red light. Daylight causes the stone to appear green while an incandescent light source would make the stone appear red (Gem-A, 2009 and Fritsch, and Rossman, 1987)<\/p>\n<figure id=\"attachment_83332\" aria-describedby=\"caption-attachment-83332\" style=\"width: 540px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-83332 size-full\" src=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/Alexandrite.jpg\" alt=\"\" width=\"540\" height=\"434\" srcset=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/Alexandrite.jpg 540w, https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/Alexandrite-300x241.jpg 300w\" sizes=\"(max-width: 540px) 100vw, 540px\" \/><figcaption id=\"caption-attachment-83332\" class=\"wp-caption-text\"><center>Image courtesy of John Harris gemlab.co.uk<\/center><\/figcaption><\/figure>\n<p>In\u00a0 alexandrite\u00a0 the\u00a0\u00a0 chromium\u00a0 band\u00a0 is\u00a0\u00a0 around\u00a0 580nm intermediate between ruby and emerald.<\/p>\n<h2><strong>Conclusion<\/strong><\/h2>\n<p>The same number of oxygen atoms surround the Cr3+ as emerald, ruby, and alexandrite although those oxygen ions are in a differing pattern, at different distances from the Cr3+ . (Gem-A 2009) The host materials then interact with the chromium differently. When the electrons are excited (illuminated) it causes absorption of certain wavelengths of light, resulting in color. (Fritsch, and Rossman, 1987) The difference in body color can be directly related to how much energy (example. Sunlight) is required for an electron to jump from one level to another.<\/p>\n<figure id=\"attachment_83336\" aria-describedby=\"caption-attachment-83336\" style=\"width: 664px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-83336 size-full\" src=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/table1.jpg\" alt=\"\" width=\"664\" height=\"456\" srcset=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/table1.jpg 664w, https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/table1-300x206.jpg 300w\" sizes=\"(max-width: 664px) 100vw, 664px\" \/><figcaption id=\"caption-attachment-83336\" class=\"wp-caption-text\"><center>Slight changes in octahedral coordination environment lead to changes in the splitting of the t2g and eg orbitals, which changes the color the material (OSU, 2003).<\/center><\/figcaption><\/figure>\n<figure id=\"attachment_83337\" aria-describedby=\"caption-attachment-83337\" style=\"width: 736px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-83337 size-full\" src=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/table2.jpg\" alt=\"\" width=\"736\" height=\"576\" srcset=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/table2.jpg 736w, https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/table2-300x235.jpg 300w\" sizes=\"(max-width: 736px) 100vw, 736px\" \/><figcaption id=\"caption-attachment-83337\" class=\"wp-caption-text\"><center>In each of the three gemstones Cr3+ impurities substitute for Al3+ on an octahedral site (OSU, 2003).<\/center><\/figcaption><\/figure>\n<h2>References<\/h2>\n<p>Douma, M., curator. (2008). Why are rubies red?<br \/>\nIn Cause of Color. Retrieved 2017 http:\/\/www.webexhibits.org\/causesofcolor\/6AA.html<\/p>\n<p>Fritsch, E., and Rossman G.R. (1987) &#8220;An Update on Color in Gems. Part 1: Introduction and Colors Caused by Dispersed Metal Ions.&#8221; Gems &amp; Gemology Vol. 23.NO.3 https:\/\/www.gia.edu\/gems-gemology\/fall-1987-color-gems-fritsch<\/p>\n<p>Gemmological Association of Great Britain, (2009) Diploma in Gemmology London section D7 pg 23-24<\/p>\n<p>Sicree, A. A. (2007)&#8221;Chrome, Rubies, Emeralds, and Alexandrite.&#8221; Popular Mineralogy #7 http:\/\/worcestermineralclub.org\/wp-content\/uploads\/2015\/03\/PopMin-07a.pdf<\/p>\n<p>https:\/\/cbc-wb01x.chemistry.ohio- state.edu\/~woodward\/ch754\/lect2003\/optical1_lect21.pdf<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Just the other day I happened to wake up early. That is unusual for an engineering student. After a long time I could witness the sunrise. I could feel the sun rays falling on my body. Usual morning is followed by hustle to make it to college on time. This morning was just another morning yet seemed different.<\/p>\n","protected":false},"author":1,"featured_media":83333,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Effects of Chromium in Ruby, Emerald and Alexandrite - Detroit Jewelry Appraisers<\/title>\n<meta name=\"description\" content=\"Learn about the effects of chromoum in gemstones such as Ruby, Emerald,and Alexandrite.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Effects of Chromium in Ruby, Emerald and Alexandrite - Detroit Jewelry Appraisers\" \/>\n<meta property=\"og:description\" content=\"Learn about the effects of chromoum in gemstones such as Ruby, Emerald,and Alexandrite.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/\" \/>\n<meta property=\"og:site_name\" content=\"Detroit Jewelry Appraisers\" \/>\n<meta property=\"article:published_time\" content=\"2020-05-27T17:10:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-30T22:05:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/emerald.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"552\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/\"},\"author\":{\"name\":\"Admin\",\"@id\":\"https:\/\/www.detroitja.com\/#\/schema\/person\/91d6ce3ee8d06d8945dfa5e0a76d4d20\"},\"headline\":\"Effects of Chromium in Ruby, Emerald and Alexandrite\",\"datePublished\":\"2020-05-27T17:10:42+00:00\",\"dateModified\":\"2024-01-30T22:05:58+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/\"},\"wordCount\":608,\"publisher\":{\"@id\":\"https:\/\/www.detroitja.com\/#organization\"},\"articleSection\":[\"Articles\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/\",\"url\":\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/\",\"name\":\"Effects of Chromium in Ruby, Emerald and Alexandrite - Detroit Jewelry Appraisers\",\"isPartOf\":{\"@id\":\"https:\/\/www.detroitja.com\/#website\"},\"datePublished\":\"2020-05-27T17:10:42+00:00\",\"dateModified\":\"2024-01-30T22:05:58+00:00\",\"description\":\"Learn about the effects of chromoum in gemstones such as Ruby, Emerald,and Alexandrite.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.detroitja.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Effects of Chromium in Ruby, Emerald and Alexandrite\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.detroitja.com\/#website\",\"url\":\"https:\/\/www.detroitja.com\/\",\"name\":\"Detroit Jewelry Appraisers\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.detroitja.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.detroitja.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.detroitja.com\/#organization\",\"name\":\"Detroit Jewelry Appraisers\",\"url\":\"https:\/\/www.detroitja.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.detroitja.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/04\/logo.png\",\"contentUrl\":\"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/04\/logo.png\",\"width\":1000,\"height\":330,\"caption\":\"Detroit Jewelry Appraisers\"},\"image\":{\"@id\":\"https:\/\/www.detroitja.com\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.detroitja.com\/#\/schema\/person\/91d6ce3ee8d06d8945dfa5e0a76d4d20\",\"name\":\"Admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.detroitja.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/46de73de388d606da26aa5777506fd18?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/46de73de388d606da26aa5777506fd18?s=96&d=mm&r=g\",\"caption\":\"Admin\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Effects of Chromium in Ruby, Emerald and Alexandrite - Detroit Jewelry Appraisers","description":"Learn about the effects of chromoum in gemstones such as Ruby, Emerald,and Alexandrite.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/","og_locale":"en_US","og_type":"article","og_title":"Effects of Chromium in Ruby, Emerald and Alexandrite - Detroit Jewelry Appraisers","og_description":"Learn about the effects of chromoum in gemstones such as Ruby, Emerald,and Alexandrite.","og_url":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/","og_site_name":"Detroit Jewelry Appraisers","article_published_time":"2020-05-27T17:10:42+00:00","article_modified_time":"2024-01-30T22:05:58+00:00","og_image":[{"width":552,"height":400,"url":"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/05\/emerald.jpg","type":"image\/jpeg"}],"author":"Admin","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Admin","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/#article","isPartOf":{"@id":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/"},"author":{"name":"Admin","@id":"https:\/\/www.detroitja.com\/#\/schema\/person\/91d6ce3ee8d06d8945dfa5e0a76d4d20"},"headline":"Effects of Chromium in Ruby, Emerald and Alexandrite","datePublished":"2020-05-27T17:10:42+00:00","dateModified":"2024-01-30T22:05:58+00:00","mainEntityOfPage":{"@id":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/"},"wordCount":608,"publisher":{"@id":"https:\/\/www.detroitja.com\/#organization"},"articleSection":["Articles"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/","url":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/","name":"Effects of Chromium in Ruby, Emerald and Alexandrite - Detroit Jewelry Appraisers","isPartOf":{"@id":"https:\/\/www.detroitja.com\/#website"},"datePublished":"2020-05-27T17:10:42+00:00","dateModified":"2024-01-30T22:05:58+00:00","description":"Learn about the effects of chromoum in gemstones such as Ruby, Emerald,and Alexandrite.","breadcrumb":{"@id":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.detroitja.com\/effects-of-chromium-in-ruby-emerald-and-alexandrite\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.detroitja.com\/"},{"@type":"ListItem","position":2,"name":"Effects of Chromium in Ruby, Emerald and Alexandrite"}]},{"@type":"WebSite","@id":"https:\/\/www.detroitja.com\/#website","url":"https:\/\/www.detroitja.com\/","name":"Detroit Jewelry Appraisers","description":"","publisher":{"@id":"https:\/\/www.detroitja.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.detroitja.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.detroitja.com\/#organization","name":"Detroit Jewelry Appraisers","url":"https:\/\/www.detroitja.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.detroitja.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/04\/logo.png","contentUrl":"https:\/\/www.detroitja.com\/wp-content\/uploads\/2020\/04\/logo.png","width":1000,"height":330,"caption":"Detroit Jewelry Appraisers"},"image":{"@id":"https:\/\/www.detroitja.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.detroitja.com\/#\/schema\/person\/91d6ce3ee8d06d8945dfa5e0a76d4d20","name":"Admin","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.detroitja.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/46de73de388d606da26aa5777506fd18?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/46de73de388d606da26aa5777506fd18?s=96&d=mm&r=g","caption":"Admin"}}]}},"_links":{"self":[{"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/posts\/82867"}],"collection":[{"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/comments?post=82867"}],"version-history":[{"count":10,"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/posts\/82867\/revisions"}],"predecessor-version":[{"id":83339,"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/posts\/82867\/revisions\/83339"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/media\/83333"}],"wp:attachment":[{"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/media?parent=82867"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/categories?post=82867"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.detroitja.com\/wp-json\/wp\/v2\/tags?post=82867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}