Troyská unce

1 troyská unce zlata

Troyská unce (výslovnost [trojská] i [troaská][1], častěji psáno jako trojská unce, v angličtině troy weight nebo troy ounce) je základní váhová jednotka (přibližně 31,1 gramu) používaná na národních a mezinárodních trzích stříbra, zlata, platiny a dalších drahých kovů, příp. drahokamů. Název pochází od francouzského města Troyes, kde se v ní poprvé obchodovalo již v období středověku.[2]

Pro troyskou unci se používá zkratka 1 oz t, případně 1 t oz, 1 oz. tr. apod. Podle mezinárodní normy ISO 4217, která definuje zkratky pro měny, je pro drahé kovy vážené v troyských uncích určena zkratka tvořená písmenem X následovaným dvěma písmeny chemické značky kovu: XAG – stříbro, XAU zlato atd.

  • 1 troyská unce = 31,1034768 gramů
  • 1 troyská libra = 12 troyských uncí = 373,2417216 gramů
  • 1 kilogram = 32,15 troyských uncí (zaokrouhleně)
  • 175 troyských uncí = 192 uncí


Reference

  1. ↑ Akademický slovník cizích slov. Praha, Academia 1998 ISBN 80-200-0982-5
  2. ↑ KALABIS, Zbyněk. Mince z drahých kovů. Vaše peníze uloží nebo zhodnotí. Měšec.cz [online]. Internet Info, 2017-05-18 [cit. 2017-05-18]. Dostupné online. ISSN 1213-4414. 

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