{"id":71,"date":"2010-08-07T00:23:32","date_gmt":"2010-08-07T04:23:32","guid":{"rendered":"http:\/\/advisor.yenmedia.ca\/2010\/08\/07\/tolkowsky\/"},"modified":"2020-05-03T21:39:49","modified_gmt":"2020-05-04T01:39:49","slug":"tolkowsky","status":"publish","type":"page","link":"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/tolkowsky\/","title":{"rendered":"Diamond Characteristics (Advanced) &#8211; Tolkowsky"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row css=&#8221;.vc_custom_1587003472530{margin-bottom: 50px !important;}&#8221;][vc_column]<div class=\"dt-fancy-separator title-left h1-size style-disabled title-color accent-border-color\" style=\"width: 100%;\"><div class=\"dt-fancy-title\"><span class=\"separator-holder separator-left\"><\/span>Tolkowsky Ideal Cuts<span class=\"separator-holder separator-right\"><\/span><\/div><\/div>[vc_column_text css=&#8221;.vc_custom_1587864204211{padding-top: 20px !important;}&#8221;]Starting your online diamond search with focus on ideal cut diamonds is a great path to a brilliant diamond with sparkle and liveliness.\u00a0 For those looking for absolute perfection, learning about the Tolkowsky Ideal Cut will bring your diamond search to the next level.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<h3>Defining Ideal Proportions for Round Diamonds<\/h3>\n<p>In 1919, Marcel Tolkowsky (an engineer by education and member of a Belgian family of diamond cutters) wrote a master\u2019s thesis on the ideal proportions for round diamonds. The ideal proportions designated by Tolkowsky were derived from mathematical calculations that considered both the fire and brilliance of the stone.<\/p>\n<p>The target set by Tolkowsky to be considered\u00a0&#8220;ideal&#8221;\u00a0was of a diamond with:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a title=\"Diamond Crown Angle\" href=\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/diamond-anatomy#crownangle\">Crown angle<\/a>\u00a0of 34.5 degree<\/li>\n<li><a title=\"Diamond Pavilion\" href=\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/diamond-anatomy#pavilion\">Pavilion<\/a>\u00a040.75 degree<\/li>\n<li><a title=\"Diamond Table\" href=\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/diamond-anatomy#table\">Table<\/a>\u00a0of 53 percent<\/li>\n<li>Total Depth of 59.3 percent<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>These diamond proportions are considered as well chosen and have been the industry benchmark for diamonds labeled as \u201cideal\u201d for the past 80 years.\u00a0 In essence, Tolkowsky can be considered the father of the ideal cut diamond.[\/vc_column_text][\/vc_column][\/vc_row][vc_row bg_type=&#8221;bg_color&#8221; bg_color_value=&#8221;rgba(0,0,0,0.04)&#8221;][vc_column][vc_column_text]<\/p>\n<h3>Not Everything Ideal is Really Ideal<\/h3>\n<p>Marcel Tolkowsky&#8217;s &#8216;ideal proportions&#8217; were intended as a set of general &#8220;<em>guidelines<\/em>&#8221; (as certain aspects of a diamond&#8217;s cut had not been taken into consideration or explored). Marketing and branding campaigns at times generalize Tolkowsky&#8217;s concept of ideal diamond proportions in an effort to label diamonds as \u201cideal\u201d even though their properties don&#8217;t fall within the Tolkowsky&#8217;s designated tolerances. \u00a0On the other hand, studies have shown diamonds OUTSIDE of the proportions indicated by Tolkowsky can be equally or even more beautiful than a Tolkowsky Ideal Cut Diamond.<\/p>\n<p>When applying your knowledge about Tolkowsky ideal cuts, our recommendation is to use it for filtering out poor performing diamonds and not for final selection.\u00a0 \u00a0Find out more in our <a href=\"https:\/\/diamondadvisor.ca\/diamond-advice\/diamond-buying-guide\/\">diamond buying guide<\/a>.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<h3>Using Tolkowsky&#8217;s Ideal Proportions<\/h3>\n<p>A brilliant diamond is a complex interrelationship of light reflecting and refracting off the many <a title=\"diamond education about facets\" href=\"\/diamond-education-advanced\/diamond-anatomy\/\">facets<\/a> of a diamond as light travels through it. \u00a0As such, determining which diamonds are desirable and which are overvalued can be tricky. \u00a0When starting your diamond search, use Tolkowsky\u2019s ideal proportions as a baseline and a starting tool to help you filter the good from the bad. \u00a0Other tools such as Ideal Scope and ASET reports will help you narrow down the best diamond from your set.[\/vc_column_text][vc_column_text css=&#8221;.vc_custom_1587868234505{padding-left: 50px !important;}&#8221;]<\/p>\n<div data-pm-slice=\"1 1 []\" data-en-clipboard=\"true\">\n<h4>Guidelines Proportions for Round Ideal Cut Diamonds:<\/h4>\n<\/div>\n<div data-pm-slice=\"1 1 []\" data-en-clipboard=\"true\"><span data-highlight=\"yellow\"><strong>Total depth<\/strong> between <span class=\"dt-highlight\" >59 \u2013 61.8%<\/span> <\/span><\/div>\n<div><span data-highlight=\"yellow\"><strong>Table diameter<\/strong> between <span class=\"dt-highlight\" >53 \u2013 57.5%<\/span> <\/span><\/div>\n<div><span data-highlight=\"yellow\"><strong>Crown angle<\/strong> between <span class=\"dt-highlight\" >34.3 \u2013 34.9 degrees\u00a0<\/span><\/span><\/div>\n<div><span data-highlight=\"yellow\"><strong>Pavilion angle<\/strong> between <span class=\"dt-highlight\" >40.6 \u2013 40.9 degrees\u00a0<\/span><\/span><\/div>\n<div><span data-highlight=\"yellow\"><strong>Girdle edge<\/strong> between <span class=\"dt-highlight\" >thin to medium<\/span><\/span><\/div>\n<div><span data-highlight=\"yellow\"><strong>Culet<\/strong>: none (GIA) or pointed (AGS)<\/span><\/div>\n<div><\/div>\n<p>[\/vc_column_text][vc_column_text]The above guidelines will help you get a stone with the best light performance available.\u00a0 Some of these parameters need to be entered as part of the &#8220;advanced&#8221; settings on a online diamond retailers website.\u00a0 As as example, use our <a href=\"http:\/\/www.jamesallen.com\/loose-diamonds\/round-cut\/?CaratFrom=1.00&amp;CaratTo=1.40&amp;Color=D,E,G,H,I,J&amp;Clarity=VS2,SI1,SI2&amp;Cut=Ideal,Excellent,TrueHearts&amp;PriceFrom=400&amp;PriceTo=10000&amp;Sort=Price%20asc,%20DefaultOrder&amp;advancedParameter=Flour&amp;showAdvanced=show&amp;Polish=EX,ID&amp;Symmetry=EX,ID&amp;Lab=&amp;Flour=None,Negligible,Faint&amp;DepthFrom=59.0&amp;DepthTo=61.8&amp;TableFrom=53.0&amp;TableTo=57.5&amp;data1=text-content\" target=\"_blank\" rel=\"noopener noreferrer\">pre-filtered search<\/a> for ideal diamonds at James Allen.[\/vc_column_text][vc_btn title=&#8221;Search Pre-filtered Ideal Cuts at James Allen&#8221; color=&#8221;peacoc&#8221; size=&#8221;sm&#8221; i_icon_fontawesome=&#8221;fas fa-search&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:http%3A%2F%2Fwww.jamesallen.com%2Floose-diamonds%2Fround-cut%2F%3FCaratFrom%3D1.00%26CaratTo%3D1.40%26Color%3DD%2CE%2CG%2CH%2CI%2CJ%26Clarity%3DVS2%2CSI1%2CSI2%26Cut%3DIdeal%2CExcellent%2CTrueHearts%26PriceFrom%3D400%26PriceTo%3D10000%26Sort%3DPrice%2520asc%2C%2520DefaultOrder%26advancedParameter%3DFlour%26showAdvanced%3Dshow%26Polish%3DEX%2CID%26Symmetry%3DEX%2CID%26Lab%3D%26Flour%3DNone%2CNegligible%2CFaint%26DepthFrom%3D59.0%26DepthTo%3D61.8%26TableFrom%3D53.0%26TableTo%3D57.5%26data1%3Dcta-button||target:%20_blank|&#8221;][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"ult-spacer spacer-6620eefb11d8c\" data-id=\"6620eefb11d8c\" data-height=\"100\" data-height-mobile=\"100\" data-height-tab=\"100\" data-height-tab-portrait=\"\" data-height-mobile-landscape=\"\" style=\"clear:both;display:block;\"><\/div>[\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p><span id=\"textSectionHeader1\">Tolkowsky<\/span> &#8211; <em>Ideal Cuts<\/em><\/p>\n<hr \/>\n<p>Most of a brilliant diamond&#8217;s sparkle and liveliness comes from its cut. Rough diamonds are often cut to retain carat weight, which results in light leaking out the back of the diamond, and often produces a dull lifeless diamond with a smaller diameter.<\/p>\n<p>\u00a0<\/p>\n<h4>DEFINING IDEAL PORPORTIONS FOR ROUND DIAMONDS<\/h4>\n<p>In 1919, <span id=\"textHighlightBlue\">Marcel Tolkowsky<\/span> (an engineer by education and member of a Belgian family of diamond cutters) wrote a master\u2019s thesis on the ideal proportions for round diamonds. The ideal proportions designated by Tolkowsky were derived from mathematical calculations that considered both the fire and brilliance of the stone; these diamond proportions have generally been considered as well chosen and have been the industry benchmark for diamonds labeled as \u201cideal\u201d for the past 80 years.<\/p>\n<p>The target set by Tolkowsky to be considered <span id=\"textHighlightBlue\">&#8220;ideal&#8221;<\/span> was of a diamond with:<\/p>\n<ul>\n<li><a href=\"diamond-education-advanced\/diamond-anatomy#crownangle\" title=\"Diamond Crown Angle\">Crown angle<\/a> of 34.5 degree<\/li>\n<li><a href=\"diamond-education-advanced\/diamond-anatomy#pavilion\" title=\"Diamond Pavilion\">Pavilion<\/a> 40.75 degree<\/li>\n<li><a href=\"diamond-education-advanced\/diamond-anatomy#table\" title=\"Diamond Table\">Table<\/a> of 53 percent<\/li>\n<\/ul>\n<p>When undertaking a diamond search, finding the best diamonds starts with finding ideal cuts.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":607,"menu_order":4,"comment_status":"open","ping_status":"open","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Learn about Tolkowsky ideal cut diamonds and how the many facets of a diamond define it&#039;s brilliance and sparkle.<\/title>\n<meta name=\"description\" content=\"Learn about Tolkowsky ideal cut diamonds and how the many facets of a diamond define it&#039;s brilliance and sparkle.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/tolkowsky\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Learn about Tolkowsky ideal cut diamonds and how the many facets of a diamond define it&#039;s brilliance and sparkle.\" \/>\n<meta property=\"og:description\" content=\"Learn about Tolkowsky ideal cut diamonds and how the many facets of a diamond define it&#039;s brilliance and sparkle.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/tolkowsky\/\" \/>\n<meta property=\"og:site_name\" content=\"The Diamond Advisor\" \/>\n<meta property=\"article:modified_time\" content=\"2020-05-04T01:39:49+00:00\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/tolkowsky\/\",\"url\":\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/tolkowsky\/\",\"name\":\"Learn about Tolkowsky ideal cut diamonds and how the many facets of a diamond define it's brilliance and sparkle.\",\"isPartOf\":{\"@id\":\"https:\/\/diamondadvisor.ca\/#website\"},\"datePublished\":\"2010-08-07T04:23:32+00:00\",\"dateModified\":\"2020-05-04T01:39:49+00:00\",\"description\":\"Learn about Tolkowsky ideal cut diamonds and how the many facets of a diamond define it's brilliance and sparkle.\",\"breadcrumb\":{\"@id\":\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/tolkowsky\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/tolkowsky\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/tolkowsky\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/diamondadvisor.ca\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Diamond Education Advanced\",\"item\":\"https:\/\/diamondadvisor.ca\/diamond-education-advanced\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Diamond Characteristics (Advanced) &#8211; 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