{"id":417,"date":"2023-07-10T07:57:25","date_gmt":"2023-07-10T07:57:25","guid":{"rendered":"http:\/\/localhost:10039\/?p=417"},"modified":"2024-01-24T07:51:01","modified_gmt":"2024-01-24T07:51:01","slug":"diamond-identification-and-grading","status":"publish","type":"post","link":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/","title":{"rendered":"Diamond Identification And Grading"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><span style=\"font-weight: 400;\">The Nan Yang Gemological Institute, NGI, released the Diamond Identification and Grading Chart in 2006. This chart provides a comprehensive overview of diamond identification and grading. It includes a classification of diamond types, namely Ia, Ib, IIa, and IIb. The chart adopts the widely recognized 4C grading methodology, which assesses diamonds based on their carat weight, color, clarity, and cut. Additionally, the chart highlights various treatments applied to diamonds, as well as the synthetic (lab-grown) diamonds and diamond simulants commonly seen in the industry. It also covers the gemological instruments used to detect these treatments and imitations. Lastly, the chart incorporates weight estimation formulas for diamonds with common cuts.<\/span><\/p>\r\n<p>&nbsp;<\/p>\r\n<p><span style=\"font-weight: 400;\">You may collect a copy of the Chart free of charge at the NGI office.<\/span><\/p>\r\n<p><span style=\"font-weight: 400;\">NGI is in the process of updating the chart. <\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Immerse yourself in the latest gemological innovations that are transforming the way we understand precious stones. Our thought-provoking articles cover cutting-edge research, and innovative testing methods.<\/p>\n","protected":false},"author":1,"featured_media":406,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Diamond Identification And Grading - Nan Yang Gemological Institute: NGI<\/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:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Diamond Identification And Grading - Nan Yang Gemological Institute: NGI\" \/>\n<meta property=\"og:description\" content=\"Immerse yourself in the latest gemological innovations that are transforming the way we understand precious stones. Our thought-provoking articles cover cutting-edge research, and innovative testing methods.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/\" \/>\n<meta property=\"og:site_name\" content=\"Nan Yang Gemological Institute: NGI\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-10T07:57:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-24T07:51:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/wp-content\/uploads\/2023\/07\/ngi_resources_post_img_4-min.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"684\" \/>\n\t<meta property=\"og:image:height\" content=\"445\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"OOm Project\" \/>\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:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/\"},\"author\":{\"name\":\"OOm Project\",\"@id\":\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/#\/schema\/person\/43ded1b462524345598ef5c8a0530bea\"},\"headline\":\"Diamond Identification And Grading\",\"datePublished\":\"2023-07-10T07:57:25+00:00\",\"dateModified\":\"2024-01-24T07:51:01+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/\"},\"wordCount\":137,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/#organization\"},\"image\":{\"@id\":\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/wp-content\/uploads\/2023\/07\/ngi_resources_post_img_4-min.jpg\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/\",\"url\":\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.ngi.com.sg\/diamond-identification-and-grading\/\",\"name\":\"Diamond Identification And Grading - 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