Hardness of Gold, - misconceptions!

Written by Stuart Noble

The Scottish Heirloom Company, like most jewellery manufacturers, produces our product range in Sterling Silver, 10 kt (karat), 14kt and 18kt gold.

When choosing items in gold, customers are often reluctant to chooserepparttar higher karats of gold. This is not due torepparttar 138709 higher prices, but they have heard that 18 kt gold is softer and will wear away faster than 10kt. Is this correct? - The answer is a definite "NO!".

This is usually a surprise to many customers and also to, strangely enough, many jewellery stores sales staff..

This incorrect belief is kind of understandable, as it is fairly well known that pure (24 kt) gold is too soft to be used in most jewellery and has to be alloyed with other metals to make it harder and more durable. It is then believed thatrepparttar 138710 more ofrepparttar 138711 other metals that are added torepparttar 138712 gold,repparttar 138713 harder it becomes. The sales staffs in some jewellery stores, that mainly sell cheaper 10 kt gold items, also sometime state this idea in order to help sellrepparttar 138714 10 kt items.

Here arerepparttar 138715 approximate maximum "Vickers" hardness values ofrepparttar 138716 various Karats of gold. The higherrepparttar 138717 number,repparttar 138718 harderrepparttar 138719 alloy.

10 kt ............ 170 14 kt ............ 180 18 kt ............ 230 Sterling silver .. 65.

As you can see, contrary to most people's expectations, 18 kt gold isrepparttar 138720 hardest ofrepparttar 138721 alloys.

The term 'Karat', also spelled 'Carat' comes fromrepparttar 138722 Greek word forrepparttar 138723 seed ofrepparttar 138724 Carob tree. These seeds are very uniform in weight and were once used as standard weights when measuring very fine items. The term Karat or Carat is now also used as a measure ofrepparttar 138725 purity of gold, as a number ofrepparttar 138726 parts of gold by weight in every 24 parts of a Gold alloy. The other metals included in most gold alloys are usually copper, silver and zinc.

The hidden costs of Calling cards

Written by Chris Lipthorpe

You may be aware ofrepparttar many choices you have when buying a calling card. However, have you consideredrepparttar 138337 truthfulness ofrepparttar 138338 claims that some companies will make in order to get a competitive edge? Are you aware ofrepparttar 138339 tricks that are played andrepparttar 138340 hidden charges that are made?

The minutes that a calling card will offer may look good but did you know that even if you were to make one continuous call, then most companies would steal between 10% and %20 of those minutes. They call this "fluctuation". Then there are also other charges to be taken into account; •connection 3p-5p •daily maintenance 5p-10p •rounding up to a whole minutes •second call rate increase •increasingrepparttar 138341 rate based on call duration •overcharging for calls to other destinations not specified

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