How to Buy a Diamond Ring

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How to Buy a Diamond Ring

Diamond rings can be the perfect gift to show someone how special they truly are. Diamond rings are often purchased as an engagement ring, or simply as an unforgettable gift. Unlike many other rings, buying a diamond ring may be one of the most important jewellery related purchases that people make. There are different considerations for purchasing a diamond ring which include understanding the 4Cs of purchasing a diamond. By taking the time to select the right diamond ring, the buyer can be sure the diamond lasts.

People can purchase diamond rings in brick and mortar jewellery stores, or online using eBay. Because of eBay's large selection of diamond rings, it is simple to find a diamond ring, especially when trying to adhere to a budget. No matter what the occasion, a diamond ring makes the perfect gift for that special someone. Before making a purchase, it is important to determine ring size, understand the 4Cs, and set a budget.

Determine the Ring Size

Before purchasing a diamond ring, it is helpful to know the ring size of the wearer. Many rings may in fact have to be resised, this action can often be an additional cost on top of the price of the ring. Ring size can be determined from printable ring size charts available online. When measuring ring size, the hand should be warm, and the ring should fit easily over the knuckle. In addition, finger size can differ on each hand, so a ring that fits on the left ring finger may not fit on the right ring finger.

Understand the 4Cs of Buying a Diamond

Purchasing a diamond ring can oftentimes be more complex than purchasing other rings. Before choosing a diamond, the buyer should consider the 4Cs: colour, clarity, carat and cut. By understanding the 4Cs of diamonds, the buyer can choose a quality diamond that fits within their budget.

Diamond Colour

While diamonds come in almost every colour under the sun, the colour chart for buying diamonds pertains mainly to white or colourless diamonds. The ideal diamond is colourless, making it easy for light to pass through the diamond, which gives it incredible brilliance and sparkle. The colour chart is based on specific grades for diamond colour, beginning with colourless diamonds with a grade of D, and ending with light yellow diamonds with a grade of Z.

Diamond Colour Grades

Diamonds with grades of D, E, and F are virtually colourless. Slight yellow hues can be seen in diamonds graded J through M, which can inhibit the amount of light that passes through the diamond. Choosing a diamond colour is based on personal preference as well as budget. While many people purchase highest grade diamond they can afford, other people prefer the warmer glow from lower grade diamonds.

Diamond Clarity

Diamond clarity refers to the different blemishes or inclusions on the diamond. Flawless diamonds are very rare and tend to be extremely expensive. Blemishes are flaws found on the outside of the diamond, while inclusions are flaws within the diamond that interrupt the passage of light through the diamond. Inclusions include air bubbles, cracks, or flecks of black carbon found inside the diamond and are almost always natural to the diamond. Blemishes on the other hand usually occur during the cutting process. Many of the flaws and inclusions are not visible to the naked eye, and can only be seen under a microscope.

Diamond Clarity Grading

Diamond clarity is graded based on the amount of flaws found on the diamond, grades of F or IF, mean that the diamond is flawless or internally flawless (with no inclusions). Diamonds with grades of F or IF are extremely rare. Other grades include VVS1/VVS2- very very slightly included, VS1/VS2- very slighting included, SI1/SI2- slightly included, and I1/I2/I3, included. Diamond grades from F-SI1/SI2 have flaws only detectable under a microscope. I1/I2/I3 diamonds have flaws that are visible both under a microscope and with the naked eye. Purchasing a diamond with an I1/I2/I3 grade is not recommended.

Diamond Carat

The diamond carat weight is the unit used to weigh the diamond. Large diamonds with high carat weight are often much rarer than smaller diamonds due to their natural growth process, so they are often much more valuable than smaller carat diamonds, so a 2 carat diamond is much more expensive than a 1 carat diamond. The differences in diamond size is often visible, but should depend on personal preference as well as budget. Carat size is based on a scale of 100. In rings with multiple smaller diamonds, carat weight is often determined by the total weight of all of the combined diamonds.

When purchasing a diamond on a budget, it is still easy to find a large diamond if that is the most important factor in choosing the stone. Large diamonds are often more affordable if the grades of colour and clarity are lower. Also, choosing a diamond that is 0.99 carats instead of 1 carat, can reduce the cost for a diamond that is similar in size.

Diamond Cut

When most people think about cut, they immediately think of the shape of the diamond. However, the cut of the diamond actually refers to how the diamond was cut in order to reflect light. Well-cut diamonds allow the light to enter the diamond, and reflect back to create a brilliant sparkle. A well-cut diamond may be the most important of the 4Cs, to ensure that the sparkle of the diamond does not fade quickly.

Although cut and shape are separate factors, choosing the shape of the diamond is also important before making a purchase. The chart below describes the different shapes of diamond and what each shape highlights on the diamond.

Type of Diamond Shape


Highlighting Quality



Highlights cut


Square or rectangle with pointed corners

Highlights colour


Rectangular, step-cut

Highlights clarity


Step-cut, similar to emerald but square

Highlights clarity


Oval shaped with pointed edges

Highlights cut



Highlights cut


Square or rectangle with trimmed corners

Highlights cut


Teardrop shape with one pointed edge and one rounded edge

Highlights cut



Highlights colour


Square shape with rounded corners and large facets

Highlights cut

Diamond shapes that highlight cut, typically feature brilliant light reflection and sparkle. Shapes that highlight colour should be chosen with a high colour grade, since yellow hues can often be visible due to the shape of the diamond. Finally, shapes that highlight clarity show the flawlessness and clarity of the diamond. Diamond shape can be chosen based on which factors of the diamond the shape highlights, or simply as a matter of personal preference.

Set a Budget

Since diamond rings can often be an expensive investment, it is important to set a budget before making a purchase. When purchasing an engagement ring, the general rule of thumb is two month's salary, but setting a budget relies solely on personal preference. Many people choose to save money for such a large investment, which can be helpful for such a large purchase. After understanding which factors of buying a diamond ring are most important, finding a diamond ring within any budget is simple.

How to Buy a Diamond Ring on eBay

After determining which factors are most important to you when choosing a diamond ring, eBay can help you find exactly what you are looking for, while sticking to your budget. With the thousands of options for diamond rings that are available on eBay, you can easily search to find the shape, carat weight, or colour of the ring. To begin your search, you can start with the keyword search box on the eBay home page. If you already know what you are looking for, you can start by searching a specific keyword in the box, such as '1 carat diamond ring'. To browse different options, you can choose a more narrow search such as 'diamond ring', in order to see all of the different options and prices.

Sticking to your budget is very simple when searching on eBay. When browsing the different options, you can set a price maximum, to ensure that you only spend time looking at diamond ring options within your price range. This makes it easy to find exactly what you are looking for, without overspending.


While many people think purchasing a diamond ring has to be a large investment, eBay makes it easy to find the perfect ring on a budget. If size is the most important factor, choosing a lower clarity and colour grade, makes finding a large ring much more affordable. If colour or cut is the most important factor, choose lower size or clarity grades. When choosing a ring, it is important to factor in the tastes of the recipient. If the recipient usually wears large jewellery, size may be the most important factor. Some people prefer coloured diamonds over white, which can also easily be found on eBay.

Before making a purchase, it is also important to determine the metal base of the ring. White gold, silver, and platinum go well with nearly every skin tone, while rose or yellow gold fit best with warm skin tones. No matter which detailed features the buyer is looking for, eBay makes it easy to find the perfect ring that is sure to be cherished and appreciated.

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