{"id":5607,"date":"2024-12-04T21:36:44","date_gmt":"2024-12-04T19:36:44","guid":{"rendered":"http:\/\/www.e-gems.cz\/?post_type=kamen&#038;p=5607"},"modified":"2025-03-21T18:48:27","modified_gmt":"2025-03-21T16:48:27","slug":"barvomenny-granat","status":"publish","type":"kamen","link":"https:\/\/www.e-gems.cz\/en\/kamen\/barvomenny-granat\/","title":{"rendered":"Barvom\u011bnn\u00fd gran\u00e1t"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Historie<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Barvom\u011bnn\u00fd gran\u00e1t je zn\u00e1m\u00fd svou schopnost\u00ed m\u011bnit barvu v z\u00e1vislosti na typu sv\u011btla, co\u017e z n\u011bj \u010din\u00ed drah\u00fd k\u00e1men s unik\u00e1tn\u00edmi optick\u00fdmi vlastnostmi. Historie barvom\u011bnn\u00e9ho gran\u00e1tu nen\u00ed p\u0159esn\u011b datov\u00e1na; gran\u00e1ty byly zn\u00e1m\u00e9 a pou\u017e\u00edvan\u00e9 ji\u017e ve starov\u011bku, nicm\u00e9n\u011b specifick\u00fd typ gran\u00e1tu s barvom\u011bnou byl objeven a\u017e ve 20. stolet\u00ed. Prvn\u00ed zn\u00e1m\u00e9 nalezi\u0161t\u011b t\u011bchto gran\u00e1t\u016f bylo pops\u00e1no v Tanzanii v 70. letech 20. stolet\u00ed a objev tohoto drah\u00e9ho kamene vyvolal zna\u010dn\u00fd z\u00e1jem mezi gemology a sb\u011brateli kv\u016fli jeho unik\u00e1tn\u00ed schopnosti m\u011bnit barvu, kter\u00e1 do t\u00e9 doby byla zn\u00e1ma p\u0159edev\u0161\u00edm u alexandritu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vlastnosti<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Barvom\u011bnn\u00fd gran\u00e1t pat\u0159\u00ed do skupiny gran\u00e1t\u016f, co\u017e je \u0161irok\u00e1 rodina miner\u00e1l\u016f s obecn\u00fdm chemick\u00fdm vzorcem X\u2083Y\u2082(SiO\u2084)\u2083, ve kter\u00e9m X a Y p\u0159edstavuj\u00ed r\u016fzn\u00e9 kovy jako \u017eelezo, ho\u0159\u010d\u00edk, hlin\u00edk a v tomto p\u0159\u00edpad\u011b i vanad a chrom. Pr\u00e1v\u011b tyto prvky jsou zodpov\u011bdn\u00e9 za barvom\u011bnn\u00e9 vlastnosti drahokamu. Gran\u00e1t m\u00e1 podle Mohsovy stupnice tvrdost 7 a\u017e 7,5, co\u017e jej \u010din\u00ed vhodn\u00fdm pro \u0161perka\u0159sk\u00e9 vyu\u017eit\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Barvom\u011bnn\u00e9 gran\u00e1ty mohou m\u011bnit barvu z \u010derven\u00e9 nebo r\u016f\u017eov\u00e9 v denn\u00edm sv\u011btle na fialovou nebo modrou pod um\u011bl\u00fdm osv\u011btlen\u00edm, p\u0159i\u010dem\u017e zm\u011bna barvy je zp\u016fsobena rozd\u00edlnou absorpc\u00ed sv\u011bteln\u00fdch vlnov\u00fdch d\u00e9lek p\u0159i r\u016fzn\u00fdch sv\u011bteln\u00fdch podm\u00ednk\u00e1ch. Tato vlastnost je velmi podobn\u00e1 vlastnostem alexandritu, kter\u00fd je zn\u00e1m\u00fd svou schopnost\u00ed m\u011bnit barvu v z\u00e1vislosti na osv\u011btlen\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Geneze<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Barvom\u011bnn\u00fd gran\u00e1t vznik\u00e1 v metamorfovan\u00fdch hornin\u00e1ch, kde se tvo\u0159\u00ed za specifick\u00fdch geologick\u00fdch podm\u00ednek, kter\u00e9 umo\u017e\u0148uj\u00ed vznik miner\u00e1l\u016f bohat\u00fdch na vanad a chrom. Tento proces zahrnuje vysok\u00e9 teploty a tlaky, kter\u00e9 vedou k tvorb\u011b krystal\u016f s unik\u00e1tn\u00edmi optick\u00fdmi vlastnostmi. Podobn\u011b jako u jin\u00fdch gran\u00e1t\u016f, i u barvom\u011bnn\u00e9ho gran\u00e1tu jsou d\u016fle\u017eit\u00e9 podm\u00ednky vzniku a chemick\u00e9 slo\u017een\u00ed horniny. Tyto faktory ur\u010duj\u00ed kvalitu a intenzitu barvom\u011bnn\u00e9ho efektu, kter\u00fd je zcela z\u00e1visl\u00fd na p\u0159\u00edtomnosti spr\u00e1vn\u00fdch stopov\u00fdch prvk\u016f v krystalu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdskyt<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nejv\u00fdznamn\u011bj\u0161\u00ed nalezi\u0161t\u011b barvom\u011bnn\u00e9ho gran\u00e1tu se nach\u00e1zej\u00ed v Tanzanii a na Madagaskaru, p\u0159i\u010dem\u017e pr\u00e1v\u011b tyto st\u00e1ty jsou hlavn\u00edmi producenty tohoto vz\u00e1cn\u00e9ho drahokamu. Nejv\u00fdznamn\u011bj\u0161\u00ed nalezi\u0161t\u011b v&nbsp;Tanzanii se nach\u00e1zej\u00ed v oblasti kolem m\u011bsta Tunduru, na Madagaskaru jsou pak v oblasti Bekily. Men\u0161\u00ed mno\u017estv\u00ed barvom\u011bnn\u00e9ho gran\u00e1tu bylo tak\u00e9 nalezeno v jin\u00fdch zem\u00edch, jako je Sr\u00ed Lanka, Ke\u0148a a Spojen\u00e9 st\u00e1ty americk\u00e9, ale tato nalezi\u0161t\u011b nejsou komer\u010dn\u011b v\u00fdznamn\u00e1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Imitace<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Barvom\u011bnn\u00e9 gran\u00e1ty jsou n\u011bkdy zam\u011b\u0148ov\u00e1ny za barvom\u011bnn\u00e9 p\u0159\u00edrodn\u00ed saf\u00edry, barvom\u011bnn\u00e9 syntetick\u00e9 saf\u00edry a barvom\u011bnn\u00e9 sklo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Syntetick\u00e1 v\u00fdroba<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Synteticky se barvom\u011bnn\u00e9 gran\u00e1ty nevyr\u00e1b\u011bj\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdznamn\u00e9 \u0161perky<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0160perky s barvom\u011bnn\u00fdm gran\u00e1tem jsou \u010dasto vyr\u00e1b\u011bny na zak\u00e1zku a mohou b\u00fdt velmi cen\u011bn\u00e9, zejm\u00e9na pokud obsahuj\u00ed v\u011bt\u0161\u00ed a kvalitn\u00ed kameny. S&nbsp;v\u00fdrazn\u011b barvom\u011bnn\u00fdm gran\u00e1tem je t\u00e9m\u011b\u0159 nemo\u017en\u00e9 se setkat v historick\u00fdch \u0161perc\u00edch, av\u0161ak modern\u00ed \u0161perky vyu\u017e\u00edvaj\u00edc\u00ed tento drah\u00fd k\u00e1men se st\u00e1vaj\u00ed st\u00e1le popul\u00e1rn\u011bj\u0161\u00edmi. Vz\u00e1cnost kamene a jeho fascinuj\u00edc\u00ed schopnost m\u011bnit barvu z n\u011bj \u010din\u00ed ide\u00e1ln\u00ed volbu pro exkluzivn\u00ed prsteny, n\u00e1hrdeln\u00edky a dal\u0161\u00ed luxusn\u00ed \u0161perky.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Historie Barvom\u011bnn\u00fd gran\u00e1t je zn\u00e1m\u00fd svou schopnost\u00ed m\u011bnit barvu v z\u00e1vislosti na typu sv\u011btla, co\u017e z n\u011bj \u010din\u00ed drah\u00fd k\u00e1men s unik\u00e1tn\u00edmi optick\u00fdmi vlastnostmi. Historie barvom\u011bnn\u00e9ho gran\u00e1tu nen\u00ed p\u0159esn\u011b datov\u00e1na; gran\u00e1ty byly zn\u00e1m\u00e9 a pou\u017e\u00edvan\u00e9 ji\u017e ve starov\u011bku, nicm\u00e9n\u011b specifick\u00fd typ gran\u00e1tu s barvom\u011bnou byl objeven a\u017e ve 20. stolet\u00ed. Prvn\u00ed zn\u00e1m\u00e9 nalezi\u0161t\u011b t\u011bchto gran\u00e1t\u016f [&hellip;]<\/p>\n","protected":false},"featured_media":7644,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false},"class_list":["post-5607","kamen","type-kamen","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.e-gems.cz\/en\/wp-json\/wp\/v2\/kamen\/5607","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.e-gems.cz\/en\/wp-json\/wp\/v2\/kamen"}],"about":[{"href":"https:\/\/www.e-gems.cz\/en\/wp-json\/wp\/v2\/types\/kamen"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.e-gems.cz\/en\/wp-json\/wp\/v2\/media\/7644"}],"wp:attachment":[{"href":"https:\/\/www.e-gems.cz\/en\/wp-json\/wp\/v2\/media?parent=5607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}