{"id":49233,"date":"2020-03-16T04:00:51","date_gmt":"2020-03-16T02:00:51","guid":{"rendered":"http:\/\/gioiellis.com\/?p=49233"},"modified":"2024-08-05T18:01:19","modified_gmt":"2024-08-05T16:01:19","slug":"allarme-diamanti-falsi","status":"publish","type":"post","link":"https:\/\/gioiellis.com\/fr\/allarme-diamanti-falsi\/","title":{"rendered":"Alarme faux diamants"},"content":{"rendered":"<p><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<script><br \/>\n     (adsbygoogle = window.adsbygoogle || []).push({<br \/>\n          google_ad_client: \"ca-pub-1422720793454724\",<br \/>\n          enable_page_level_ads: true<br \/>\n     });<br \/>\n<\/script><\/p>\n<p><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-format=\"fluid\" data-ad-layout=\"image-side\" data-ad-layout-key=\"-fe+6a+31-k2+pr\" data-ad-client=\"ca-pub-1422720793454724\" data-ad-slot=\"8583266876\"><\/ins><br \/>\n<script><br \/>\n     (adsbygoogle = window.adsbygoogle || []).push({});<br \/>\n<\/script><\/p>\n<p><strong>M\u00e9fiez-vous des fraudes: augmente le nombre de diamants synth\u00e9tiques qui sont propos\u00e9s frauduleusement comme naturels.<\/strong><br \/>\nAlarme diamants. Les experts rapportent une mont\u00e9e de diamants synth\u00e9tiques pass\u00e9s comme r\u00e9els. L&rsquo;ann\u00e9e dernier un bon nombre de faux diamants ont \u00e9t\u00e9 identifi\u00e9s par le Gemological Institute of America en Inde. Gia, en fait, a trouv\u00e9 un nombre inhabituellement \u00e9lev\u00e9 de diamants synth\u00e9tiques non rapport\u00e9s, qui ont \u00e9t\u00e9 m\u00e9lang\u00e9s avec des diamants naturels.<\/p>\n<figure id=\"attachment_49235\" aria-describedby=\"caption-attachment-49235\" style=\"width: 709px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/falso-diamante.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-49235 size-full\" src=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/falso-diamante.jpg\" alt=\"Falsio diamante\" width=\"709\" height=\"472\" title=\"\" srcset=\"https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/falso-diamante.jpg 709w, https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/falso-diamante-300x200.jpg 300w, https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/falso-diamante-83x55.jpg 83w, https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/falso-diamante-220x145.jpg 220w\" sizes=\"auto, (max-width: 709px) 100vw, 709px\" \/><\/a><figcaption id=\"caption-attachment-49235\" class=\"wp-caption-text\">Falso diamante<\/figcaption><\/figure>\n<p>Lire aussi: <strong><a href=\"http:\/\/gioiellis.com\/fr\/comment-reconnaitre-un-diamant-vrai-ou-faux\" target=\"_blank\" rel=\"noopener noreferrer\">Reconna\u00eetre si un diamant est\u00a0autentique<\/a>.<\/strong><br \/>\nPour \u00eatre pr\u00e9cis, ils ont \u00e9t\u00e9 identifi\u00e9s 101 diamants synth\u00e9tiques dans un paquet de 323 pierres au laboratoire de Mumbai de GIA. Tous sont petits: de 0,014 \u00e0 0,015 carats. Le probl\u00e8me est que le service d&rsquo;analyse a \u00e9t\u00e9 offert depuis quelques ann\u00e9es: combien de fausses pierres ont \u00e9t\u00e9 certifi\u00e9es authentiques avant? En fait, ce n&rsquo;est pas la premi\u00e8re fois qu&rsquo;une fraude est d\u00e9tect\u00e9e: la premi\u00e8re grande d\u00e9couverte de pierres synth\u00e9tiques non d\u00e9clar\u00e9es a eu lieu en mai 2012, lorsque plusieurs centaines de diamants CVD ont \u00e9t\u00e9 envoy\u00e9s \u00e0 l&rsquo;Institut Gemological \u00e0 Anvers et \u00e0 Mumbai, D&rsquo;\u00eatre certifi\u00e9s comme des diamants naturels.<\/p>\n<figure id=\"attachment_49236\" aria-describedby=\"caption-attachment-49236\" style=\"width: 709px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/esame-diamante.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-49236\" src=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/esame-diamante.jpg\" alt=\"Esame di un diamante in India\" width=\"709\" height=\"462\" title=\"\" srcset=\"https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/esame-diamante.jpg 709w, https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/esame-diamante-300x195.jpg 300w, https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/esame-diamante-84x55.jpg 84w\" sizes=\"auto, (max-width: 709px) 100vw, 709px\" \/><\/a><figcaption id=\"caption-attachment-49236\" class=\"wp-caption-text\">Esame di un diamante in India<\/figcaption><\/figure>\n<p>M\u00eame ces faux diamants ont \u00e9t\u00e9 cr\u00e9\u00e9s avec la technique appel\u00e9e CVD (n&rsquo;est pas le seul syst\u00e8me): est un acronyme qui indique la technique qui permet de fabriquer des diamants avec le d\u00e9p\u00f4t chimique de\u00a0vapeur. Essentiellement, un m\u00e9lange d&rsquo;hydrog\u00e8ne et de m\u00e9thane est soumis \u00e0 des temp\u00e9ratures tr\u00e8s \u00e9lev\u00e9es (environ 900 degr\u00e9s). A ce moment-l\u00e0, les mol\u00e9cules divis\u00e9es et transform\u00e9es en \u00e9l\u00e9ments carbone sont d\u00e9pos\u00e9es sur un petit morceau de silicium, de tungst\u00e8ne, de molybd\u00e8ne, de carbure de silicium, de nitrure de silicium ou de verre de quartz. Les cristaux qui sont form\u00e9s ont la m\u00eame texture et l&rsquo;apparence de ceux d&rsquo;un diamant naturel. Le processus est cher, mais pour les diamants de petite taille est extr\u00eamement pratique. Sauf pour ceux qui croient acheter un diamant naturel.<\/p>\n<p>Celui d\u00e9couvert en Inde n&rsquo;\u00e9tait pas le seul cas de fraude: conform\u00e9ment \u00e0 la BBC, sur le site de commerce \u00e9lectronique d&rsquo;Alibaba, par exemple, des publicit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes qui proposaient des diamants synth\u00e9tiques aussi naturels.<\/p>\n<figure id=\"attachment_49237\" aria-describedby=\"caption-attachment-49237\" style=\"width: 709px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/verifica-diamanti.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-49237\" src=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/verifica-diamanti.jpg\" alt=\"Verifica dei diamanti in India\" width=\"709\" height=\"449\" title=\"\" srcset=\"https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/verifica-diamanti.jpg 709w, https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/verifica-diamanti-300x190.jpg 300w, https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/verifica-diamanti-87x55.jpg 87w\" sizes=\"auto, (max-width: 709px) 100vw, 709px\" \/><\/a><figcaption id=\"caption-attachment-49237\" class=\"wp-caption-text\">Verifica dei diamanti in India<\/figcaption><\/figure>\n<p>Ce type de fraude inqui\u00e8te les grandes soci\u00e9t\u00e9s mini\u00e8res. La r\u00e9ponse pourrait \u00eatre l&rsquo;utilisation de la blockchain, une technologie qui garantit l&rsquo;authenticit\u00e9 de toute transaction et nous permet de retracer l&rsquo;origine de tout objet ou vente enregistr\u00e9 sur cette plateforme. Everledger en Australie et Tracr de De Beers sont des exemples d&rsquo;utilisation de la technologie blockchain. Le g\u00e9ant russe de l&rsquo;extraction de diamants Alrosa a \u00e9galement annonc\u00e9 l&rsquo;automne dernier qu&rsquo;il rejoindrait la plate-forme Tracr. Probl\u00e8me r\u00e9solu? Malheureusement non: tous les diamants mont\u00e9s sur les bijoux en vente ne proviennent pas de ces grands fabricants. <strong>Federico Graglia<\/strong><\/p>\n<figure id=\"attachment_49238\" aria-describedby=\"caption-attachment-49238\" style=\"width: 709px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/diamante-sintetico.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-49238\" src=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/diamante-sintetico.jpg\" alt=\"Diamanti sintetici\" width=\"709\" height=\"452\" title=\"\" srcset=\"https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/diamante-sintetico.jpg 709w, https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/diamante-sintetico-300x191.jpg 300w, https:\/\/gioiellis.com\/wp-content\/uploads\/2017\/03\/diamante-sintetico-86x55.jpg 86w\" sizes=\"auto, (max-width: 709px) 100vw, 709px\" \/><\/a><figcaption id=\"caption-attachment-49238\" class=\"wp-caption-text\">Diamanti sintetici<\/figcaption><\/figure>\n<figure id=\"attachment_19597\" aria-describedby=\"caption-attachment-19597\" style=\"width: 709px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2015\/01\/04_Il-diamante-sintetico.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-19597\" src=\"http:\/\/gioiellis.com\/wp-content\/uploads\/2015\/01\/04_Il-diamante-sintetico.jpg\" alt=\"Diamanti sintetici\" width=\"709\" height=\"474\" title=\"\" srcset=\"https:\/\/gioiellis.com\/wp-content\/uploads\/2015\/01\/04_Il-diamante-sintetico.jpg 709w, https:\/\/gioiellis.com\/wp-content\/uploads\/2015\/01\/04_Il-diamante-sintetico-300x201.jpg 300w, https:\/\/gioiellis.com\/wp-content\/uploads\/2015\/01\/04_Il-diamante-sintetico-82x55.jpg 82w\" sizes=\"auto, (max-width: 709px) 100vw, 709px\" \/><\/a><figcaption id=\"caption-attachment-19597\" class=\"wp-caption-text\">Diamanti sintetici<\/figcaption><\/figure>\n<p><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><\/p>\n<p><!-- rettangolo grande --><br \/>\n<ins class=\"adsbygoogle\" style=\"display: inline-block; width: 336px; height: 280px;\" data-ad-client=\"ca-pub-1422720793454724\" data-ad-slot=\"8343610496\"><\/ins><br \/>\n<script><br \/>\n(adsbygoogle = window.adsbygoogle || []).push({});<br \/>\n<\/script><br \/>\n<script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-format=\"autorelaxed\" data-ad-client=\"ca-pub-1422720793454724\" data-ad-slot=\"9203601299\"><\/ins><br \/>\n<script><br \/>\n     (adsbygoogle = window.adsbygoogle || []).push({});<br \/>\n<\/script><\/p>","protected":false},"excerpt":{"rendered":"<p>M\u00e9fiez-vous des fraudes: augmente le nombre de diamants synth\u00e9tiques qui sont propos\u00e9s frauduleusement comme naturels. Alarme diamants. Les experts rapportent une mont\u00e9e de diamants synth\u00e9tiques pass\u00e9s comme r\u00e9els. L&rsquo;ann\u00e9e dernier un bon nombre de faux diamants ont \u00e9t\u00e9 identifi\u00e9s par le Gemological Institute of America en Inde. Gia, en fait, a trouv\u00e9 un nombre inhabituellement \u00e9lev\u00e9 de diamants synth\u00e9tiques non rapport\u00e9s, qui ont \u00e9t\u00e9 m\u00e9lang\u00e9s avec des diamants naturels. Lire aussi: Reconna\u00eetre si un diamant est\u00a0autentique. Pour \u00eatre pr\u00e9cis, ils ont \u00e9t\u00e9 identifi\u00e9s 101 diamants synth\u00e9tiques dans un paquet de 323 pierres au laboratoire de Mumbai de GIA. Tous sont<\/p>\n","protected":false},"author":6,"featured_media":49235,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4,9570],"tags":[9,6490,8601],"class_list":["post-49233","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-diamanti","tag-diamanti","tag-gia","tag-diamanti-sintetici","style--link-1"],"acf":[],"_links":{"self":[{"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/posts\/49233","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/comments?post=49233"}],"version-history":[{"count":1,"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/posts\/49233\/revisions"}],"predecessor-version":[{"id":128311,"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/posts\/49233\/revisions\/128311"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/media\/49235"}],"wp:attachment":[{"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/media?parent=49233"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/categories?post=49233"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gioiellis.com\/fr\/wp-json\/wp\/v2\/tags?post=49233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}