{"id":12668,"date":"2026-07-04T18:39:52","date_gmt":"2026-07-04T17:39:52","guid":{"rendered":"https:\/\/carbonstoneuk.co.uk\/staging\/cvd-vs-hpht-lab-grown-diamonds\/"},"modified":"2026-07-04T18:39:52","modified_gmt":"2026-07-04T17:39:52","slug":"cvd-vs-hpht-lab-grown-diamonds","status":"publish","type":"post","link":"https:\/\/carbonstoneuk.co.uk\/staging\/cvd-vs-hpht-lab-grown-diamonds\/","title":{"rendered":"CVD vs HPHT Lab-Grown Diamonds: What\u2019s the Difference?"},"content":{"rendered":"<p><strong>Quick answer:<\/strong> CVD and HPHT are two different processes used to grow diamonds in a laboratory. Both produce real, certified diamonds. For the finished stone in your ring, the growth method makes almost no visible difference &mdash; the 4Cs and certification matter far more.<\/p>\n<h2>What is HPHT?<\/h2>\n<p><strong>HPHT (High Pressure, High Temperature)<\/strong> recreates the intense pressure and heat found deep within the earth, where natural diamonds form. A small diamond seed is exposed to these conditions and a larger diamond grows around it.<\/p>\n<h2>What is CVD?<\/h2>\n<p><strong>CVD (Chemical Vapour Deposition)<\/strong> grows a diamond from a carbon-rich gas inside a sealed chamber. Carbon atoms settle onto a seed layer by layer, building the crystal over time.<\/p>\n<h2>CVD vs HPHT at a glance<\/h2>\n<table class=\"cs-table\">\n<thead>\n<tr>\n<th>&nbsp;<\/th>\n<th>CVD<\/th>\n<th>HPHT<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Method<\/td>\n<td>Carbon gas deposition<\/td>\n<td>Extreme pressure &amp; heat<\/td>\n<\/tr>\n<tr>\n<td>Result<\/td>\n<td>Real diamond<\/td>\n<td>Real diamond<\/td>\n<\/tr>\n<tr>\n<td>Certification<\/td>\n<td>IGI \/ GIA where stated<\/td>\n<td>IGI \/ GIA where stated<\/td>\n<\/tr>\n<tr>\n<td>Everyday appearance<\/td>\n<td>Identical to the eye<\/td>\n<td>Identical to the eye<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Does it matter which you choose?<\/h2>\n<p>Not really. Once a diamond is cut, polished and graded, its beauty comes down to the <a href=\"https:\/\/carbonstoneuk.co.uk\/staging\/the-4cs\/\">4Cs<\/a> and its certificate &mdash; not the growth method. Browse our <a href=\"https:\/\/carbonstoneuk.co.uk\/staging\/shop\/\">lab-grown diamond rings<\/a> to see them for yourself.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVD and HPHT are the two ways lab-grown diamonds are made. Learn what each method means and why it rarely affects the finished diamond you wear.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[103],"tags":[],"class_list":["post-12668","post","type-post","status-publish","format-standard","hentry","category-lab-grown-diamonds","entry"],"_links":{"self":[{"href":"https:\/\/carbonstoneuk.co.uk\/staging\/wp-json\/wp\/v2\/posts\/12668","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/carbonstoneuk.co.uk\/staging\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/carbonstoneuk.co.uk\/staging\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/carbonstoneuk.co.uk\/staging\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/carbonstoneuk.co.uk\/staging\/wp-json\/wp\/v2\/comments?post=12668"}],"version-history":[{"count":0,"href":"https:\/\/carbonstoneuk.co.uk\/staging\/wp-json\/wp\/v2\/posts\/12668\/revisions"}],"wp:attachment":[{"href":"https:\/\/carbonstoneuk.co.uk\/staging\/wp-json\/wp\/v2\/media?parent=12668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/carbonstoneuk.co.uk\/staging\/wp-json\/wp\/v2\/categories?post=12668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/carbonstoneuk.co.uk\/staging\/wp-json\/wp\/v2\/tags?post=12668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}