{"id":108573,"date":"2024-07-17T13:29:56","date_gmt":"2024-07-17T11:29:56","guid":{"rendered":"https:\/\/laboratornidiamanty.cz\/hpht-ou-cvd\/"},"modified":"2026-09-21T20:59:20","modified_gmt":"2026-09-21T18:59:20","slug":"hpht-ou-cvd","status":"publish","type":"post","link":"https:\/\/laboratornidiamanty.cz\/fr\/hpht-ou-cvd\/","title":{"rendered":"HPHT ou CVD ?"},"content":{"rendered":"<h3>&nbsp;<\/h3>\n<h3><span style=\"color: #000000; font-family: Jost, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen-Sans, Ubuntu, Cantarell, Helvetica Neue, sans-serif; font-weight: 400; letter-spacing: 0px;\"><strong>HPHT ou CVD<\/strong> <span style=\"font-size: 16px;\">| Quelle m\u00e9thode de croissance choisir pour un diamant de synth\u00e8se ?&nbsp;<\/span><\/span><\/h3>\n<p style=\"color: #000000;\">HPHT = <strong>H<\/strong>igh <strong>P<\/strong>ressure &amp; <strong>H<\/strong>igh <strong>T<\/strong>emperature (haute pression et haute temp\u00e9rature)<\/p>\n<p><span style=\"color: #000000;\">CVD = <\/span><strong style=\"color: #000000;\">C<\/strong><span style=\"color: #000000;\">hemical <\/span><strong style=\"color: #000000;\">V<\/strong><span style=\"color: #000000;\">apor <\/span><strong style=\"color: #000000;\">D<\/strong><span style=\"color: #000000;\">eposition (d\u00e9p\u00f4t chimique en phase vapeur)<\/span><\/p>\n<p style=\"color: #000000;\">Les diamants de synth\u00e8se sont produits en laboratoire selon deux m\u00e9thodes de croissance : HPHT et CVD. Nous ne nous int\u00e9resserons pas ici directement \u00e0 la m\u00e9thode de croissance elle-m\u00eame, mais plut\u00f4t \u00e0 ce qui devrait, selon nous, \u00eatre important pour vous en tant que client lors du choix d&rsquo;un diamant de synth\u00e8se, et pourquoi. Il s&rsquo;agit de notre avis, fond\u00e9 sur notre propre exp\u00e9rience.&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h4 style=\"color: #000000;\">M\u00e9thode CVD<\/h4>\n<p style=\"color: #000000;\">Nous recommandons de choisir la m\u00e9thode CVD pour les petites pierres non certifi\u00e9es (IGI, GIA). Les diamants de synth\u00e8se cultiv\u00e9s selon la m\u00e9thode CVD sont d\u00e9tect\u00e9s par les testeurs comme des \u00ab diamants \u00bb, alors que les petites pierres HPHT sont d\u00e9tect\u00e9es comme de la \u00ab moissanite \u00bb. Il devient alors difficile de prouver si les pierres sont de la moissanite (SiC &#8211; carbure de silicium) ou des diamants de synth\u00e8se. La pierre sertie devrait \u00eatre retir\u00e9e du bijou, ce qui constitue \u00e9videmment une intervention non souhait\u00e9e et endommagerait un bijou d\u00e9j\u00e0 fabriqu\u00e9.&nbsp;<\/p>\n<p style=\"color: #000000;\">D&rsquo;un autre c\u00f4t\u00e9, il convient \u00e9galement d&rsquo;\u00eatre vigilant et de demander aux vendeurs de diamants naturels une confirmation que les diamants sertis ne sont pas de synth\u00e8se. Ceux-ci sont indiscernables des diamants naturels et, une fois sertis dans un bijou, le client n&rsquo;a aucun moyen de les distinguer. Vous ne pourrez pas non plus distinguer un diamant naturel d&rsquo;un diamant de synth\u00e8se m\u00eame s&rsquo;ils ne sont pas sertis dans un bijou, et cela d\u00e9pend alors de la fiabilit\u00e9 du fabricant quant aux diamants qu&rsquo;il utilise. La seule diff\u00e9rence entre les petits diamants naturels et de synth\u00e8se est le prix. Les petits diamants naturels n&rsquo;ont pas de certification ni de marquage sur le rondiste, contrairement \u00e0 tous les diamants de synth\u00e8se certifi\u00e9s de plus grande taille.&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h4 style=\"color: #000000;\">M\u00e9thode HPHT<\/h4>\n<p><span style=\"color: #000000;\">Pour les diamants de synth\u00e8se certifi\u00e9s de plus grande taille, nous recommandons au contraire de choisir la m\u00e9thode de croissance HPHT. De notre point de vue, il s&rsquo;agit de diamants de synth\u00e8se atteignant une meilleure qualit\u00e9 que ceux produits selon la m\u00e9thode CVD. Les diamants de synth\u00e8se CVD atteignent souvent un degr\u00e9 de couleur inf\u00e9rieur (G-H) et sont ensuite \u00ab am\u00e9lior\u00e9s \u00bb gr\u00e2ce \u00e0 un traitement HPHT d&rsquo;un \u00e0 deux degr\u00e9s = un diamant de synth\u00e8se G-H produit selon la m\u00e9thode CVD peut, apr\u00e8s traitement et application du proc\u00e9d\u00e9 HPHT, atteindre un degr\u00e9 de couleur sup\u00e9rieur. HPHT est en outre une m\u00e9thode qui reproduit fid\u00e8lement les conditions de formation des diamants naturels, qui se forment en profondeur sous terre. Ce qui peut toutefois pr\u00eater \u00e0 confusion, c&rsquo;est que les diamants de synth\u00e8se produits selon la m\u00e9thode HPHT peuvent \u00eatre d\u00e9tect\u00e9s comme de la \u00ab moissanite \u00bb par les testeurs. Cela est d\u00fb \u00e0 la pr\u00e9sence de minuscules particules m\u00e9talliques, qui influencent les testeurs. En revanche, ces diamants de synth\u00e8se portent un num\u00e9ro unique sur le rondiste, qui correspond au num\u00e9ro du certificat fourni avec le diamant de synth\u00e8se. Le client peut ainsi v\u00e9rifier rapidement et facilement les informations relatives \u00e0 la couleur, \u00e0 la puret\u00e9, \u00e0 la taille et aux autres caract\u00e9ristiques, soit directement sur le certificat, soit sur le site internet de l&rsquo;IGI (<\/span><a style=\"color: #000000;\" href=\"https:\/\/www.igi.org\/verify-your-report\/\">Verify Your Report &#8211; IGI<\/a><span style=\"color: #000000;\">). Il est \u00e9galement possible d&rsquo;y t\u00e9l\u00e9charger le certificat \u00e0 tout moment au format PDF.&nbsp;<\/span><\/p>\n<p style=\"color: #000000;\">Le certificat indique \u00e9galement si la pierre peut contenir des traitements suppl\u00e9mentaires (pour la m\u00e9thode CVD), ou qu&rsquo;elle n&rsquo;en contient aucun (HPHT). Cette information figure en bas du document, sous les informations de base relatives au diamant de synth\u00e8se.&nbsp;<\/p>\n<h4 style=\"color: #000000;\"><strong>R\u00e9sum\u00e9 :&nbsp;<\/strong><\/h4>\n<p style=\"color: #000000;\">Pour les petites pierres non certifi\u00e9es, nous recommandons la m\u00e9thode CVD.&nbsp;<\/p>\n<p style=\"color: #000000;\">Pour les diamants de synth\u00e8se certifi\u00e9s de plus grande taille, nous recommandons la m\u00e9thode HPHT.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"color: #000000;\"><b>Attention :&nbsp;&nbsp;<\/b><\/p>\n<p style=\"color: #000000;\">Si vous achetez \u00e9galement des diamants naturels, le vendeur devrait \u00eatre en mesure, sur demande, de v\u00e9rifier si les diamants pr\u00e9sents par exemple sur votre bague sont r\u00e9ellement naturels, car les petits diamants de synth\u00e8se ne portent pas de num\u00e9ro laser sur le rondiste, et les testeurs de diamants classiques les d\u00e9tectent \u00e9galement comme des \u00ab diamants \u00bb. Des testeurs sp\u00e9cifiques, capables de distinguer un diamant de synth\u00e8se d&rsquo;un diamant naturel, sont donc n\u00e9cessaires.&nbsp;<\/p>\n<p style=\"color: #000000;\"><strong>Nous vous proposons un choix de plus de 50 000 !! pierres, et nous sommes convaincus de pouvoir trouver le diamant parfait pour vous. Nous surveillons activement les prix de nos concurrents et pouvons affirmer que nous proposons des diamants de synth\u00e8se comme naturels aux meilleurs prix du march\u00e9.&nbsp;<\/strong><\/p>\n<p style=\"color: #000000;\">Si vous h\u00e9sitez encore, envoyez-nous votre demande et nous vous ferons parvenir sans d\u00e9lai une offre que vous pourrez comparer, sans engagement.&nbsp;<\/p>\n<p style=\"color: #000000;\">Nous nous r\u00e9jouissons de vous lire prochainement !&nbsp;<\/p>\n<p><span style=\"color: #000000;\">Pour toute question concernant les diamants de synth\u00e8se &amp; naturels, n&rsquo;h\u00e9sitez pas \u00e0 nous \u00e9crire \u00e0 l&rsquo;adresse : <\/span><a style=\"color: #000000;\" href=\"mailto:info@laboratornidiamanty.cz\">info@laboratornidiamanty.cz<\/a><span style=\"color: #000000;\">&nbsp;<\/span><\/p>\n<p><span style=\"color: #737e86;\">L&rsquo;\u00e9quipe ULTIMATE-GEMS s. r. o.&nbsp;<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; HPHT ou CVD | Quelle m\u00e9thode de croissance choisir pour un diamant de synth\u00e8se ?&nbsp; HPHT = High Pressure &amp; High Temperature (haute pression et<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":2,"featured_media":108709,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-108573","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>HPHT ou CVD ? - Diamants de laboratoire<\/title>\n<meta name=\"description\" content=\"HPHT ou CVD : quelle m\u00e9thode de croissance choisir pour votre diamant de synth\u00e8se ? 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