{"id":5690,"date":"2024-12-06T21:10:37","date_gmt":"2024-12-06T19:10:37","guid":{"rendered":"http:\/\/www.e-gems.cz\/?post_type=kamen&#038;p=5690"},"modified":"2025-03-21T12:30:24","modified_gmt":"2025-03-21T10:30:24","slug":"sinhalit","status":"publish","type":"kamen","link":"https:\/\/www.e-gems.cz\/en\/kamen\/sinhalit\/","title":{"rendered":"Sinhalit"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Historie<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sinhalit byl poprv\u00e9 pops\u00e1n v roce 1952 na Sr\u00ed Lance, ale po dlouhou dobu byl zam\u011b\u0148ov\u00e1n za oliv\u00edn. Teprve d\u00edky podrobn\u00fdm chemick\u00fdm anal\u00fdz\u00e1m bylo zji\u0161t\u011bno, \u017ee se jedn\u00e1 o zcela nov\u00fd miner\u00e1l. Sr\u00ed Lanka, kter\u00e1 je historicky bohat\u00e1 na nalezi\u0161t\u011b drah\u00fdch kamen\u016f, byla prvn\u00edm a dlouho jedin\u00fdm zdrojem sinhalitu. Pr\u00e1v\u011b kv\u016fli tomuto objevu dostal sinhalit sv\u016fj n\u00e1zev, kter\u00fd p\u0159ipom\u00edn\u00e1 jeho p\u016fvod.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sr\u00ed Lanka je zn\u00e1m\u00e1 svou bohatou histori\u00ed v oblasti t\u011b\u017eby drah\u00fdch kamen\u016f, jeliko\u017e zde t\u011b\u017ea\u0159i po stalet\u00ed nach\u00e1zeli saf\u00edry, rub\u00edny, m\u011bs\u00ed\u010dn\u00ed kameny a dal\u0161\u00ed vz\u00e1cn\u00e9 miner\u00e1ly. Objev sinhalitu p\u0159idal dal\u0161\u00ed vrstvu k bohat\u00e9 drahokamov\u00e9 tradici tohoto regionu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vlastnosti<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sinhalit m\u00e1 n\u011bkolik v\u00fdrazn\u00fdch vlastnost\u00ed, kter\u00e9 jej odli\u0161uj\u00ed od jin\u00fdch drah\u00fdch kamen\u016f. Jeho chemick\u00fd vzorec je MgAl(BO\u2084) a krystaluje v&nbsp;orthorombick\u00e9m syst\u00e9mu. Jeho tvrdost se podle Mohsovy stupnice pohybuje mezi 6,5 a\u017e 7,5 a jeho index lomu sv\u011btla je 1,665 a\u017e 1,715. Sinhalit m\u016f\u017ee b\u00fdt pr\u016fhledn\u00fd a\u017e pr\u016fsvitn\u00fd, p\u0159i\u010dem\u017e pr\u016fhledn\u00e9 vzorky jsou cen\u011bny nejv\u00edce. Barva sinhalitu je zp\u016fsobena stopami \u017eeleza a dal\u0161\u00edch p\u0159\u00edm\u011bs\u00ed. Ve sv\u00e9 \u010dist\u00e9 podob\u011b by byl bezbarv\u00fd, ale p\u0159\u00edtomnost t\u011bchto prvk\u016f zp\u016fsobuje hn\u011bd\u00e9 a zelen\u00e9 odst\u00edny.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sinhalit je borosilik\u00e1t typick\u00fd pro pegmatitov\u00e9 \u017e\u00edly, kde se vyskytuje spolu s&nbsp;turmal\u00edny, beryly \u010di zirkony. D\u00e1le se lze se sinhalitem setkat v hydroterm\u00e1ln\u00edm procesu, p\u0159i kter\u00e9m se tepl\u00e9 roztoky bohat\u00e9 na b\u00f3r a jin\u00e9 prvky ukl\u00e1daj\u00ed v dutin\u00e1ch hornin. Sinhalit se tak\u00e9 m\u016f\u017ee vyskytovat v metamorfovan\u00fdch v\u00e1penc\u00edch a dolomitech, kde vznik\u00e1 za p\u016fsoben\u00ed tepla a tlak\u016f, kter\u00e9 p\u0159em\u011b\u0148uj\u00ed p\u016fvodn\u00ed miner\u00e1ly na nov\u00e9 formy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdskyt<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vzhledem k tomu, \u017ee sinhalit je vz\u00e1cn\u00fd miner\u00e1l, jsou jeho nalezi\u0161t\u011b omezena na n\u011bkolik lokalit, p\u0159i\u010dem\u017e Sr\u00ed Lanka (oblast Ratnapura) je historicky nejd\u016fle\u017eit\u011bj\u0161\u00edm zdrojem tohoto miner\u00e1lu. D\u00e1le se s&nbsp;n\u00edm m\u016f\u017eeme setkat v&nbsp;oblasti Mogoku v&nbsp;Myanmaru. Men\u0161\u00ed a nep\u0159\u00edli\u0161 p\u011bkn\u00e9 kusy byly nalezeny t\u00e9\u017e v&nbsp;Tanzanii.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Imitace<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sinhalit je ob\u010das zam\u011b\u0148ov\u00e1n za oliv\u00edn.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Syntetick\u00e1 v\u00fdroba<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sinhalit nen\u00ed synteticky vyr\u00e1b\u011bn.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Historie Sinhalit byl poprv\u00e9 pops\u00e1n v roce 1952 na Sr\u00ed Lance, ale po dlouhou dobu byl zam\u011b\u0148ov\u00e1n za oliv\u00edn. Teprve d\u00edky podrobn\u00fdm chemick\u00fdm anal\u00fdz\u00e1m bylo zji\u0161t\u011bno, \u017ee se jedn\u00e1 o zcela nov\u00fd miner\u00e1l. Sr\u00ed Lanka, kter\u00e1 je historicky bohat\u00e1 na nalezi\u0161t\u011b drah\u00fdch kamen\u016f, byla prvn\u00edm a dlouho jedin\u00fdm zdrojem sinhalitu. Pr\u00e1v\u011b kv\u016fli tomuto objevu dostal [&hellip;]<\/p>\n","protected":false},"featured_media":7595,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false},"class_list":["post-5690","kamen","type-kamen","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.e-gems.cz\/en\/wp-json\/wp\/v2\/kamen\/5690","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\/7595"}],"wp:attachment":[{"href":"https:\/\/www.e-gems.cz\/en\/wp-json\/wp\/v2\/media?parent=5690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}