{"id":5493,"date":"2022-12-19T10:57:44","date_gmt":"2022-12-19T09:57:44","guid":{"rendered":"http:\/\/dalloz-stones.com\/cz-best-alternative-diamond\/"},"modified":"2023-03-30T10:22:38","modified_gmt":"2023-03-30T08:22:38","slug":"cz-best-alternative-diamond","status":"publish","type":"post","link":"https:\/\/dalloz-stones.com\/fr\/cz-best-alternative-diamond\/","title":{"rendered":"Le zirconium ou CZ : la meilleure alternative au diamant"},"content":{"rendered":"
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Aujourd\u2019hui, le diamant est la pierre pr\u00e9cieuse la plus dure, la plus pure et la plus brillante au monde. Elle est aussi l\u2019une des plus rares : en cause, son processus de cr\u00e9ation qui n\u00e9cessite de 1 \u00e0 3,3 milliards d\u2019ann\u00e9es\u2026<\/strong> Autant dire que depuis sa d\u00e9couverte il y a pr\u00e8s de 5 000 ans, l\u2019homme n\u2019a eu de cesse de chercher \u00e0 reproduire ce mat\u00e9riau exceptionnel.<\/strong><\/strong><\/p>

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Les ersatz de diamant cr\u00e9\u00e9s ont \u00e9t\u00e9 nombreux : d\u2019abord, les strass au XVIIIe<\/sup> si\u00e8cle en verre de plomb, le spinel synth\u00e9tique, la fabulite ou encore le yag au d\u00e9but du XXe<\/sup> si\u00e8cle\u2026 C\u2019est le cubic zirconium, invent\u00e9 en 1973, qui remportera finalement les faveurs des joaillers. En effet, le zirconium cubique, une fois taill\u00e9 aux bonnes proportions, \u00e9tait difficilement identifiable \u2013 m\u00eame par des professionnels \u2013 et \u00e0 raison, ses propri\u00e9t\u00e9s sont tr\u00e8s proches du diamant\u2026<\/p>

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\"\"
CZ sous diff\u00e9rents angles<\/figcaption><\/figure>
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Une grande r\u00e9sistance aux hautes temp\u00e9ratures<\/strong><\/strong><\/h2>

Avec sa grande r\u00e9sistance aux hautes temp\u00e9ratures, le zirconium cubique s\u2019av\u00e8re \u00eatre une des meilleures alternatives possibles au diamant, notamment pour le sertissage. Loin de la temp\u00e9rature de fusion remarquable du diamant qui culmine \u00e0 3546,85 \u00b0C, le CZ peut tout de m\u00eame supporter d\u2019\u00eatre chauff\u00e9 jusqu\u2019\u00e0 2 680\u00b0C.<\/p>

Sa brillance et sa transparence<\/strong><\/strong><\/h2>

L\u2019indice de r\u00e9fraction du zirconium est de 2,18, ce qui le place tr\u00e8s proche du diamant dont l\u2019indice est particuli\u00e8rement \u00e9lev\u00e9 (2,41), lui donnant sa grande capacit\u00e9 \u00e0 r\u00e9fl\u00e9chir la lumi\u00e8re. C\u2019est principalement la bonne taille de la pierre qui lui donnera toute sa profondeur et sa brillance.<\/p>

Son scintillement, ses \u201cfeux\u201d arc-en-ciel<\/strong><\/strong><\/h2>

Le CZ est aussi une pierre synth\u00e9tique \u00e0 la dispersion tr\u00e8s forte (0.058\u20130.066), bien sup\u00e9rieure \u00e0 celle du diamant (0.044), ce qui signifie qu\u2019il renvoie un fort scintillement \u2013 on dit qu\u2019il brille de mille feux\u2026 C\u2019est ce qui rend le cubic zirconia si particulier par rapport \u00e0 ses concurrents et en fait une des meilleures alternatives au diamant !<\/p>

Sa duret\u00e9<\/strong><\/h2>

Le CZ est \u00e9galement particuli\u00e8rement r\u00e9sistant, contrairement au strass tr\u00e8s utilis\u00e9 en bijouterie. Sur l\u2019\u00e9chelle de Mohs, mesurant la duret\u00e9 des mat\u00e9riaux, il est en effet \u00e0 8,5 quand le diamant est \u00e0 l\u2019indice maximal qui est de 10. En comparaison, le cristal synth\u00e9tique \u2013 comme chez Swarovski \u2013 a une duret\u00e9 de 7. Plus la duret\u00e9 est \u00e9lev\u00e9e, plus la pierre restera intacte dans le temps : le diamant par exemple ne pr\u00e9sentera jamais de rayure \u00e0 sa surface.<\/p>

Son prix<\/strong><\/h2>

La raret\u00e9 d\u2019un mat\u00e9riau fait son prix, le diamant ne d\u00e9roge pas \u00e0 la r\u00e8gle avec un prix moyen de 5000\u20ac \u00e0 6000\u20ac pour un diamant d\u2019un carat (soit 0,2 grammes). Son prix est exponentiel en fonction du nombre de carats de la pierre : plus elle est grosse, plus elle est rare. En comparaison, le CZ est bon march\u00e9 avec ses 1\u20ac par carat.<\/p>

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Pour finir, si les diamantaires ont mis en place des certificats de garantie pour les diamants (reposant sur les \u201c4C\u201d : cut, clarity, carat, color), le cubic zirconia est d\u00e9sormais soumis aux m\u00eames exigences et attentes que la pierre la plus dure au monde. La gravure au laser, faite sur diamant comme garantie en suppl\u00e9ment du certificat, s\u2019est \u00e9galement d\u00e9mocratis\u00e9e pour le CZ avec des acteurs du domaine comme Preciosa et Swarovski, et bient\u00f4t Dalloz\u2026<\/p>

Cependant, le diamant et le cubic zirconia se ressemblent, elles peuvent tout de m\u00eame \u00eatre facilement diff\u00e9renci\u00e9es gr\u00e2ce \u00e0 une analyse approfondie de leurs propri\u00e9t\u00e9s.<\/p>

<\/div>","protected":false},"excerpt":{"rendered":"

Aujourd\u2019hui, le diamant est la pierre pr\u00e9cieuse la plus dure, la plus pure et la plus brillante au monde. Elle est aussi l\u2019une des plus rares : en cause, son processus de cr\u00e9ation qui n\u00e9cessite de 1 \u00e0 3,3 milliards d\u2019ann\u00e9es\u2026<\/p>\n","protected":false},"author":2,"featured_media":5495,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[15],"tags":[],"class_list":["post-5493","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee"],"acf":[],"yoast_head":"\nLe zirconium ou CZ : la meilleure alternative au diamant • Dalloz stones & rough<\/title>\n<meta name=\"description\" content=\"What is the best alternative to diamond ? 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