Gold and white gold how do they differ?
• United States
10 Feb 07
Hi,my grandmother was allergic to yellow gold and not white gold or silver, here is some info on them and what they mean Platinum Versus White Gold (and a PS regarding Titanium) Also 14k Yellow Gold Versus 18K/24K Yellow-Gold Why is Platinum so very expensive: Platinum is rare. Ten tons of platinum ore is required to process a single ounce of pure platinum. Platinum is very dense-60% more dense than Gold. A piece of jewelry made of Platinum is considerably heavier and stronger than its counterpart in Gold, therefore more expensive due to its bulk weight alone. The most important consideration is the labor factor in producing a finely finished piece of Platinum jewelry. Due to its density and unique working properties, it requires a highly skilled craftsman to create a quality piece of Platinum jewelry. The working environment must be absolutely pristine and free of other metal contaminants-requiring the Platinumsmith to maintain a separate set of tools exclusively devoted to Platinum jewelry. What is the difference between White Gold and Yellow Gold? To understand White Gold, one needs to understand Yellow Gold Pure Yellow Gold (fine gold) is softer than pure silver, but harder than tin. Its beauty and luster are unmatched by any alloyed gold (pure gold mixed with other metals). The extreme malleability, ductility, and softness of pure gold make it practically useless for jewelry applications. It is just too soft! The addition of alloying elements (other metals) to gold are used to increase the toughness and hardness of the metal. While almost any metal can be alloyed (melted) with gold, only certain metals will not dramatically change the color or make the metal brittle. The addition of the metal like Indium (great as an alloy with Platinum), for instance, turns gold into a purple color and gives resulting gold the workability of glass. Any pressure and it shatters. Over time, certain percentages of gold have become legally recognized "karats." The karat indicates the amount of gold as a percentage of the total: 24 karat is 24/24's gold or 100% gold. 18 karat is 18/24's gold or 75% gold (25% of the other metals are non-gold) 14 karat is 14/24's gold or 58.33% gold. (41.67% of the other metals are non-gold) In karated gold, there is a balance of the other metals in the non-gold percentage. These metals provide the various colors and hardness of karated golds. Typical alloying metals mixed with gold and their color visual effects are: 24 karat Gold has a stunning visual Gold effect of course Mixing Gold with Copper causes a visual Reddening effect Mixing Gold with Silver causes a visual Greening effect Mixing Gold with Zinc causes a visual Bleaching effect of the gold Mixing Gold with Nickel causes a visual Whitening effect Mixing Gold with Palladium causes a visual Whitening effect How do jewelers use the above metal alloys to obtain different visual Gold colors??? 18k and 14k Yellow Gold is Gold alloyed with copper, silver, zinc 14k and 18k White Gold is Gold alloyed with copper, nickel, zinc Red Gold (or Rose) is Gold alloyed with just copper Green Gold (you hardly see it ever used) is Gold alloyed with just silver Adjusting the proportions of coloring metal agents shown above provides the array of colors on the market. So finally, what is the difference between 14k & 18k Yellow Gold and 14k & 18k White Gold??? Yellow Gold is alloyed with silver, while White Gold is alloyed with nickel. It is that simple. So if someone ever tells you 14k White Gold and 14k Yellow Gold are different, they are correct to a point. They are different only in visual color and whether one of the additional metals alloyed with the Gold was silver or nickel. They are not different as to their 58.3% pure Gold content and they are not different as to their percentages of alloyed copper and zinc. Short answer is: Are Yellow Gold and White Gold different metals? NO!! Are Yellow Gold and White Gold different Gold alloys? YES!! Even though it is called ‘White Gold’, the alloyed metal has a slight yellowish tint. A jewelry item made of White Gold is often electroplated with a thin coating of Rhodium, which is a member of the Platinum family metals (to make it more white from its yellow). There really is no distinct advantage in using White Gold versus Yellow Gold; it is a matter of personal 'metal' visual preference.
10 Feb 07
It is an alloy of Gold with one of the white metals like paaladium, or silver. It is also measured in catats and fetch the value in re sale. In yellow gold the alloy is a mix with copper. The white gold makes some allergy because of nickel for some people. If you need more information log on to wikipedia or www.gold.org . hope this information would be sufficient.