We strive to make sure our customers are as informed as they can be when selling gold – this page will provide resources to educate yourself as much as you like. Don’t stop here though, there are tons of resources on the web as well – this is just a collection of what we have made ourselves and items that we consider especially noteworthy.
Want to understand how the silver test works and the potential results? Check out this video we made ourselves to help inform. We will be trying to get the other tests up to show you how they work.
Gold, Platinum, Silver and Other Precious Metals FAQs
Pure gold (fine gold) is softer than pure silver but harder than tin. Its beauty and luster are unmatched by any alloyed gold. The extreme malleability, ductility, and softness of pure gold make it practically useless for jewelry applications. 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 a select group of metals will not dramatically change the color or make the metal brittle. For example, we never mix indium with gold because it turns gold purple and gives gold the workability of glass.
What is a Karat ?
Over time, certain percentages of gold have become legally recognized “karats.” The karat indicates the amount of gold as a percentage of the total, i.e. 24 karat is 100 percent gold. In karated gold, there is a balance of metals in the non-gold percentage called alloys. These metals provide the various colors and hardness of karated gold. 18 karat gold is 18 parts gold and 6 parts alloys such as copper, nickel, silver or zinc. 14 karat gold is 14 parts gold and 10 parts alloy. Gold standards vary around the world. In the United States, 18, 14, and 10 karat gold are the only karats allowed to be sold as karated gold.
What is the difference between 14 karat and 18 karat gold?
18 karat gold means that the metal is 18 parts out of 24 pure gold, or in other words, 75% pure gold. 18 karat gold is the standard for European jewelry. 14 karat gold is 14 parts gold, or 58.5% pure gold. It is the standard for American jewelry. 10K is 41.7% Gold.
What is used to change the color of gold?
The addition of alloying elements (other metals) to gold are used to increase the toughness and hardness of the metal, as well as change the color. Adjusting the proportions of coloring agents provides the array of colors on the market. Additional metals enhance properties such as castability, grain size, hardness, corrosion resistance, color, workability, ultimate strength, and others. These additions can dramatically change the properties of the karated metal for better or worse. For example: 18 karat rose gold is 75%, or 18 parts fine gold and 25%, or 6 parts copper. It is the rich red copper combined with the pure yellow gold that creates a warm rosy tone. 14 karat white gold is 14 parts gold and 10 parts white metal, either nickel or palladium. These white metals dominate the color, creating a warm gray tone.
Examples of the compositions of different colors of gold are:
Yellow Gold: copper, silver, zinc
White Gold: nickel, manganese, palladium, zinc, copper
Red (Rose) Gold: copper
Green Gold: silver
A carat is a unit of weight for gemstones, where one carat equals 1/5 of a gram, or 200 milligrams. 142 carats equals one ounce. Carats are divided into 100 units, called points . For example, a half-carat gemstone would weigh .50 carats or 50 points. The important thing to note is that carat is a unit of weight, not a unit of size. A one carat stone that is dense will be smaller than a one carat stone that is less dense. For example, sapphires are denser than diamonds, so a one carat sapphire will be smaller than a one carat diamond.
What is the difference between Platinum & White Gold?
Platinum is a precious metal that costs more than gold (most of the time). It usually is mixed with other similar metals, known as the platinum group metals: iridium, palladium, ruthenium, rhodium and osmium. Platinum is extremely dense, and is much heavier than gold or silver. Platinum has a remarkably high level of durability so it does not wear or tarnish like other metals. White gold is rhodium plated to give it the same white look as platinum, but eventually the rhodium wears off and the white gold takes on a yellow cast. White gold jewelry should be rhodium plated every few years to maintain its whiteness. Platinum does not yellow or tarnish and maintains its white appearance with little maintenance and can develope a hazy patina over time.
Platinum is not susceptible to problems like stress cracking or corrosion as can be the case with white gold. Though platinum can scratch, it is more durable than white gold and does not wear down or abrade like gold. Scratches can easily be removed by buffing, and all that is required to maintain platinum is to soak it in a mild solution of soap and warm water followed by a gently rubbing with a soft bristled brush.
Platinum is considered to be the “most precious” of the precious metals. Platinum is your metal of choice, when only the best will do. Rarer than gold, stronger and more enduring – platinum is also the choice of jewelry designers for fine heirloom quality jewelry.Platinum History: Platinum evokes the future through the cool gray color and technological uses, but it also recalls the past. In the 1890’s the world renowned Louis Cartier introduced the metal as a setting, and made it part of his most exquisite creations for kings and millionaires. During the first 40 years of the twentieth century, platinum was the preferred metal for wedding and engagement rings and was almost always used to enhance the beauty of diamonds and other gemstones. However, for the duration of World War II, platinum was declared a strategic material and its use in most non-military applications was prohibited.
Sterling Silver is the whitest of all the metals. Fine silver is generally too soft for most jewelry applications. Sterling Silver is a mix of 92.5% fine silver and 7.5% copper. Silver products sometimes may be marked 925, which means that 925 parts per thousand are pure silver. 99.9% silver is called “Fine silver.” Sterling components and jewelry made in the USA are often stamped “Sterling.” Goods made for international trade are often marked “925” indicating the 92.5% fineness. “Coin” silver is used in some countries and could be marked “900” or “800” depending on fineness.
Can Gold be Magnetic?
This is rather heavily debated question. First and foremost, gold in its pure form is never magnetic. The debate comes into play when the different metals are mixed with gold are magnetic. In general higher quality jewelry will not be magnetic. But I have personally seen, tested and refined jewelry that is marked 14k and is magnetic. The gold parts per thousand come out as expected. So karated gold that is magnetic exists – but it should be a major red flag. Any magnetic gold must be further verified with the acid test – and if it is magnetic it should only be slightly magnetic. To note – Gold Filled Jewelry is magnetic in most cases – further making valuations difficult.