Types of Gold: Colors, Karats, and Jewelry Materials Explained

Types of gold are usually grouped three ways: by color, by karat purity, and by how the gold is built into a piece of jewelry. Color describes the shade of the alloy, such as yellow, white, or rose gold. Karat describes how much pure gold the metal contains, from 10K and 14K up to 18K and 24K. Construction describes whether a piece is solid gold throughout or a base metal with a gold layer, such as gold filled, gold vermeil, or gold plated. A single ring can belong to all three groups at once: solid 14K rose gold, for example.

What Are the Different Types of Gold?

The different types of gold fall into three separate classification systems. Each system answers a different question, so a complete description of a gold piece uses all three.

Color tells you what a piece looks like. Karat tells you how much gold the metal holds. Construction tells you whether that gold is the whole piece or a layer over something else. Terms such as recycled gold, rhodium plating, and two-tone gold describe sourcing, coatings, or design, and they are covered separately below.

Types of Gold by Color

Pure gold has one natural color: a deep, warm yellow. Every other shade comes from the metals gold is alloyed with, from a compound gold forms with another element, or from a surface coating. Yellow, white, and rose gold are the three main colors used in fine jewelry. The rest are uncommon, and several are too brittle or surface-dependent for everyday rings.

Yellow Gold

Yellow gold is gold alloyed with silver and copper in proportions that preserve gold's natural warm color. Higher karats look deeper and more saturated, so 18K yellow gold appears richer than 10K. Because the color runs through the metal, yellow gold has no plating that needs to be renewed.

White Gold

White gold is gold alloyed with white metals such as palladium, nickel, or silver. Most white gold alloys still have a faint warm or grayish tint, so jewelers usually finish them with rhodium plating for a bright white surface. Some white gold alloys contain nickel, which is a common cause of skin sensitivity.

Rose Gold

Rose gold is gold alloyed mainly with copper, usually with a small amount of silver. Copper creates the pink tone, and more copper produces a deeper color. Copper also tends to make rose gold alloys slightly harder, although the full alloy recipe and karat matter more than color alone.

For a side-by-side look at how the two most popular colors differ in appearance, care, and cost, see our guide to white gold vs yellow gold.

Green Gold

Green gold is gold alloyed mostly with silver, which shifts its color toward a soft yellow-green. Electrum, a gold and silver alloy that also occurs in nature, has a similar pale tone. Green gold appears mainly in artisan pieces and multicolor designs rather than in mainstream bridal jewelry.

Black Gold

Black gold is almost always a surface treatment, not a black alloy. The color can come from black rhodium or ruthenium plating, from vapor-deposited coatings, from controlled oxidation of cobalt-containing gold alloys, or from laser texturing. Because the black layer sits on the surface, it can wear away on high-contact areas such as ring shanks.

Blue Gold

Blue gold usually refers to an intermetallic compound, which is a fixed chemical combination of gold and another element. Gold with indium contains about 46% gold, and gold with gallium about 58%. These compounds are brittle, so they are used as small inlays or accents. Some pieces sold as blue gold are only surface-colored.

Purple Gold

Purple gold, also called amethyst gold, is an intermetallic compound of gold and aluminum containing about 79% gold, close to 19K. It has a distinct violet color but can crack or shatter if struck. Jewelers treat purple gold more like a gemstone, setting it as an accent instead of forming it into a ring band.

Gray Gold

Gray gold is a muted, steel-toned gold alloy, typically made with palladium or with combinations that include silver, copper, and iron. It is normally left without rhodium plating so its soft gray color shows. Gray gold is uncommon in mainstream American jewelry stores.

Other Gold Shades: Red, Pink, and Champagne Gold

Red gold and pink gold belong to the rose gold family. Red gold has the highest copper content and the deepest tone, while pink gold is lighter. These names are not standardized between manufacturers. Champagne gold is a descriptive name for a pale, warm yellow rather than a defined alloy, so the karat stamp tells you what the piece actually is.

Types of Gold by Karat and Purity

Karat (K or Kt) measures gold purity on a 24-part scale. 24K gold is 24 out of 24 parts gold, while 14K gold is 14 parts gold and 10 parts other metals, or about 58.3% gold. Karat with a K is different from carat with a C, which measures gemstone weight; our carat vs karat guide explains the difference.

Fineness marks express the same purity in parts per thousand. A ring stamped 750 is 750/1000 gold, which is 75%, or 18K.

The 14K entry has two common marks because 14 divided by 24 equals 58.33%. Some manufacturers stamp 583, the exact figure, while many use 585, the fineness standard widely used internationally, which sits slightly above the minimum. In the United States, the National Gold and Silver Stamping Act allows karat gold to test no more than 3 parts per thousand below its marked fineness, or 7 parts per thousand when solder is included in the test.

24K gold is the purest gold sold commercially, typically at least 99.9% gold and marked 999. It is very soft and scratches, bends, and wears easily, so it is used more for bullion and some cultural jewelry than for diamond settings.

22K gold is about 91.7% gold and can be marked 916 or 917. Its deep yellow color is traditional in South Asian and Middle Eastern jewelry. Like 24K, it is relatively soft for prong-set stones worn every day.

18K gold is 75% gold and can be marked 750. It has a richer color than lower karats and is widely used for fine jewelry and engagement rings. With more gold and less alloy, 18K is often softer and more expensive than the same design in 14K.

14K gold is about 58.3% gold and can be marked 585 or 583. It is one of the most common karats for fine jewelry in the United States because it pairs substantial gold content with good resistance to everyday wear.

12K gold is 50% gold and can be marked 500. It is uncommon in American fine jewelry today, but it appears in some vintage pieces and as the gold layer in some gold filled and rolled gold plate jewelry.

10K gold is about 41.7% gold and can be marked 417. It is the lowest karat traditionally sold as gold in the United States. Its higher alloy content generally makes it more resistant to scratches and dents, with a paler color than higher karats.

9K gold is 37.5% gold and can be marked 375. It is common in the United Kingdom and some other markets but rare in American stores. Current FTC Jewelry Guides recognize markings such as "9 Kt. Gold" when the karat is disclosed accurately.

Choosing among 10K, 14K, and 18K involves trade-offs in color, wear, and price. Our 10K vs 14K gold guide covers those differences in more depth.

Types of Gold Used in Jewelry by Construction

Construction describes how gold is used in a piece, separate from its color or karat. Solid gold jewelry is gold alloy all the way through, while gold plated, gold filled, and gold vermeil jewelry place a layer of gold over a different metal. Some of the terms below overlap, and several describe a manufacturing process rather than a completely separate material.

Solid Gold

Solid gold means a piece is made of karat gold alloy throughout, with no core of a different metal. A solid 14K gold ring is about 58.3% gold in every part of the metal, not just on the surface. Under FTC guidance, hollow pieces should not be called "solid," even when made of 14K gold.

Gold Plated

Gold plated jewelry has a thin layer of gold or gold alloy applied over another metal, commonly brass, copper, or stainless steel. When the gold is applied by electroplating, FTC guidance calls for gold of at least 10K and a thickness equal to at least 0.175 microns of fine gold. That layer can wear through with regular friction.

Gold Electroplated and Gold Flash Plated

Electroplating uses an electric current in a chemical bath to deposit gold onto a base metal, and it is how most gold plated jewelry is made. Gold flashed or gold washed jewelry typically has a coating thinner than the 0.175-micron minimum. These coatings are mostly cosmetic and can fade quickly.

Heavy Gold Electroplate

Heavy gold electroplate, often marked HGE, is electroplated gold of at least 10K with a thickness equal to at least 2.5 microns of fine gold. That is about 14 times the minimum for standard gold electroplate, yet it remains a surface layer over a base metal.

Gold Vermeil

Gold vermeil, pronounced "ver-MAY," is sterling silver coated with gold or gold alloy of at least 10K and a thickness equal to at least 2.5 microns of fine gold, according to the FTC Jewelry Guides. If another base metal, such as nickel, is placed between the silver and the gold, that must be disclosed. Vermeil is not automatically hypoallergenic.

Gold Filled

Gold filled jewelry has a layer of karat gold bonded to a base metal, usually brass, with heat and pressure instead of electroplating. US guidelines require the gold to be at least 10K and at least 1/20 of the item's total metal weight, often marked "1/20 14K GF." This much thicker layer is usually far more durable than standard plating.

Rolled Gold and Rolled Gold Plate

Rolled gold plate, marked RGP, uses the same mechanical bonding as gold filled jewelry but with a thinner layer: at least 1/40 of the total metal weight, shown with the fraction and karat, such as "1/40 12K RGP." "Rolled gold" by itself is an informal or international term, so the marking shows which standard a piece meets.

Gold Overlay and Gold Bonded

Gold overlay is an FTC-recognized term for mechanically bonded gold, held to the same 1/40 minimum as rolled gold plate. Gold bonded is a marketing term with no FTC definition. It can describe anything from a bonded layer to ordinary plating, so ask the seller for the karat and thickness.

Gold PVD Coating

PVD, or physical vapor deposition, applies a very thin, hard film in a vacuum chamber, often onto stainless steel. Many gold-tone PVD finishes are ceramic compounds such as titanium nitride and may contain little or no real gold. PVD usually resists scuffs better than basic plating, but it is still a surface coating.

Other Gold Terms You May Come Across

The terms below describe where gold came from, how its surface is treated, or how a design combines colors. None of them is a separate purity grade.

• Gold alloy: Any mixture of gold with other metals. All gold below 24K is an alloy.

• Recycled gold: Gold refined from previously used jewelry, dental, or industrial material. Refining returns it to pure gold before it is alloyed again, so recycled 14K gold is chemically the same as newly mined 14K gold.

• Reclaimed gold: Often used interchangeably with recycled gold, sometimes specifically for gold recovered from electronics or manufacturing scrap.

• Fairmined and Fairtrade Gold: Certification labels, managed by the Alliance for Responsible Mining and Fairtrade International, for gold from small-scale mines that meet defined social and environmental standards. Both describe sourcing, not purity.

• Two-tone and three-tone gold: Designs that combine two or three gold colors in one piece, such as a yellow gold band with a white gold diamond head. Each color is a separate alloy.

• Rhodium-plated white gold: White gold coated with rhodium, a platinum-group metal, for a brighter white. The plating wears gradually and a jeweler can reapply it.

• Gold finish: The surface texture of gold, such as high polish, satin, brushed, matte, or hammered. Some product listings also use "gold finish" loosely to mean gold-colored plating, so check for a karat mark.

How to Read Gold Stamps and Hallmarks

Most gold jewelry carries a quality mark, usually inside a ring band, on an earring post, or near a clasp. In the United States, these marks are applied by the manufacturer rather than an independent assay office. Federal law requires anyone who stamps a gold quality mark to add a registered trademark or maker's name beside it.

Abbreviations vary between manufacturers and countries, and older or imported pieces may follow different conventions. A stamp alone does not prove authenticity, because marks can be faked or worn away. A jeweler can confirm metal content with acid testing or X-ray fluorescence (XRF). XRF reads the surface, so plated items may need additional testing. Reputable sellers state the karat and construction in writing.

Which Gold Types Are Used for Fine Jewelry?

Fine jewelry is usually made in solid 10K, 14K, or 18K gold, with silver and platinum as the main alternative. Here is how those choices typically show up across different pieces:

• Engagement rings: 14K and 18K are the most common, since prongs and settings must hold a diamond securely through daily wear.

• Wedding bands: 14K and 18K are standard, and 10K is a durable, lower-cost option. Plated metals are rarely used because bands face constant friction.

• Diamond earrings: 10K, 14K, and 18K all work well, because earrings see little impact.

• Diamond bracelets and diamond necklaces: Links, clasps, and settings flex and rub, so solid 14K or 18K gold is a frequent choice.

Frequently Asked Questions About Types of Gold

How many types of gold are there?

There is no official count, because gold is classified three ways at once. In practice, most fine jewelry uses three colors (yellow, white, and rose) in solid 10K, 14K, or 18K gold. Rare colors and coated materials extend the list.

Can different gold colors have the same karat?

Yes. 14K yellow, white, and rose gold all contain about 58.3% pure gold. Only the remaining 41.7% changes, and that mix of other metals is what creates each color.

Are white gold and rose gold real gold?

Yes. Both are genuine gold alloys, not gold-colored substitutes. White gold's bright finish usually comes from rhodium plating, and if that plating wears, the metal underneath is still real 14K or 18K gold.

Is 10K gold real gold?

Yes, solid 10K gold is real gold, with about 41.7% gold throughout. Pieces marked 10K GF or 10K GEP are different: only the surface layer is 10K gold, and the core is a base metal.

Does solid gold mean 24K gold?

No. "Solid" describes construction and "24K" describes purity. A solid 14K ring is 14K alloy all the way through, and most solid gold jewelry is 10K, 14K, or 18K.

Is gold vermeil the same as gold plated?

Not exactly. All vermeil is gold plated, but not all gold plating is vermeil. Vermeil requires a sterling silver base and a gold layer about 14 times thicker than the minimum for ordinary gold plating.

Is rolled gold real gold?

Rolled gold contains real karat gold, but only as a bonded surface layer over a base metal such as brass. Because the gold may be as little as 1/40 of the metal weight, its gold value is small.

Which type of gold lasts the longest?

Solid gold lasts longest because there is no layer to wear through. Among layered options, gold filled usually outlasts vermeil and plating thanks to its thicker bonded layer.

Choosing the Right Type of Gold

The right type of gold depends on four things: the color you prefer, the karat that fits your wear and budget, whether the piece is solid or layered gold, and how often you will wear it. Ouros Jewels offers lab-grown diamond jewelry with selectable metal options, including solid 10K, 14K, and 18K gold where available. Explore Ouros Jewels lab grown diamond jewelry to compare metals on the designs you love.