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Cože? Hematit není přírodní minerál?
Dotaz z Facebooku.
Krásný den přeji, mám od Vás hematitové kousky různých podob - přívěsek býk, korálky , kříže atd - ale až nyní jsem si uvědomila, že vše je hematit syntetický - a dívala jsem se na Váš web že ani nic z pravého hematitu nemáte - čím to? Lze u Vás sehnat přírodní hematit nebo to z nějakého důvodu ani není reálné chtít? Děkuji ????
Odpověď:
Dobrý den.
Přírodní hematit je stručně řečeno rez (hnědooranžový minerál, velmi měkký, snadno se drolí a barví) a věříme, že z takového minerálu by nikdo určitě nic na sobě nosit nechtěl. Nicméně tím, jak je hematit jako minerál velmi dobře dostupný, dokázali jej výrobci přetvořit z nevyužitelného minerálu díky smísení s uhlím (resp. koksem) na surovinu využitelnou pro výrobu korálků.
Z hnědooranžové rudy tak vzniká díky uhlí černý hematit s vyšším obsahem uhlíku, který je tvrdší, nebarví, ani se samovolně neštípe. Materiál je ale tak zase na druhou stranu o něco křehčí a citlivější na náraz, než původní ruda.
Jednoduše řešeno se z pravého přírodního hematitu nikde nic nevyrábí. Vždy musí dojít alespoň povrchově k protavení s koksem, aby se povrch zacelil a vytvořil pevnou lesklou černou krustu. Někteří výrobci, či prodejci uvádí, že jde stále o přírodní hematit, jelikož původní ruda je přírodní, ale nám osobně přijde, že je to čistě jen marketingový trik, jak kupující obelhat, protože tím zatajují poměrně zásadní úpravu, kterou s minerálem člověk musí provést, aby byl na vzduchu stabilní a mohlo se z něj cokoliv vyrábět.
Děkujeme za pochopení a přejeme příjemný a pohodový den.
Za Korálky Katlas
Ondřej Mangl
Jmenuji se Standa a v Korálkách Katlas mám na starosti vše okolo on-line aktivit. Více se o mne dozvíte zde: stanislavvavrik.cz
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