Diamonds
Gemstones

Diamond Education
Choosing the right diamond


For most people, buying a diamond is a new experience, but that doesn't mean it should be overwhelming. Amprii’s essential guide to diamonds is designed to answer all your questions.
The guide explains a diamond's characteristics, how those characteristics influence appearance, and which characteristics are most important.

 


Diamond ShapeDiamond CutDiamond ColourDiamond Clarity

 

 

Diamond Carat WeightDiamond Certification


Shape

As suggested by the title, the Shape of the diamond describes its form, principally as if looking down onto the diamond. Diamonds come in a number of shapes (round, princess, radiant, etc.), All of which have different attributes.

Amprii have a large collection of diamonds to suit most individual choices. We offer traditional round diamonds in addition to the finest non-round, or "fancy-shaped", diamonds available.

Our certified diamonds are graded by the GIA, AGS or EGL, and we are also able to source ‘uncertified’ diamonds. Our certified diamonds are graded by the GIA, AGS or EGL to have FL-SI2 clarity, D-J colour, and Ideal, Very Good, Good, or Fair cut.


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Round Cut DiamondsPrincess-Cut DiamondsEmerald-Cut DiamondsAsscher-Cut DiamondsMarquise-Cut DiamondsOval Cut DiamondsRadiant-Cut DiamondsPear-Shaped DiamondsHeart-Shaped DiamondsCushion-Cut Diamonds
Round

The round brilliant cut diamond is by far the most popular and most researched diamond shape available today. For almost 100 years, diamond cutters have been using advanced theories of light behaviour and precise mathematical calculations to optimize the fire and brilliance in a round diamond. In addition to being the most popular and researched shape, a round diamond will typically give you more flexibility in terms of balancing cut, colour, and clarity grades while still getting the fire and brilliance you want.

Princess

This is our most popular non-round diamond. It’s beautiful brilliance and unique cut makes it a favourite for engagement rings. The princess has pointed corners and is traditionally square in shape. When choosing a colour grade, consider that while the price of a J-colour non-round diamond is exceptional, colour may be slightly visible in its corners. Also, princess-cut diamonds can vary greatly in how square or rectangular they are. To find the dimension of princess you want, look for the length-to-width ratio in our interactive diamond search and on each diamond's detail page. This will determine what the diamond will look like when viewing it from above. Here are length-to-width ratios for princess-cut diamond shapes that are pleasing to the eye.

Emerald

What makes this shape different is its pavilion, which is cut with rectangular facets to create a unique optical appearance. Due to its larger, open table, this shape highlights the clarity of a diamond. If you choose an emerald-cut with a lower clarity grade, such as SI, be sure to review the clarity plot on the diamond certificate. Also, emerald-cut diamonds can vary greatly in how rectangular they are.

Asscher

This beautifully unique shape is nearly identical to the emerald-cut, except that it is square. Also, this shape has a pavilion that is cut with rectangular facets in the same style as the emerald-cut. If you choose SI-clarity be sure to view the clarity plot on the diamond certificate, because this shape highlights the clarity of the diamond. When choosing a colour grade, consider that while the price of a J-colour non-round diamond is exceptional, colour may be slightly visible in its corners.

Marquise

The shape of a marquise diamond can maximize carat weight, giving you a much larger-looking diamond. This brilliant-cut diamond looks beautiful set with round or pear-shaped side stones, and the length of the marquise makes fingers appear long and slender.

Oval

An oval diamond has beautiful brilliance that's similar to a round diamond. Oval diamonds are also very popular as their length can accentuate long, slender fingers.

Radiant

Trimmed corners are the signature of this diamond, and they help make the radiant-cut a popular and versatile choice for jewellery. A radiant-cut looks equally beautiful set with either baguette or round side-diamonds. Radiant-cut diamonds can vary in their degree of rectangularity.

Pear

This brilliant-cut diamond is also called a teardrop for its single point and rounded end. The unique look of the pear shape helps make it a popular choice for a variety of diamond jewellery. If you choose an elongated pear shape, the length of the diamond creates a subtle slimming effect on the fingers.

Heart

The heart is the ultimate symbol of love. The unique look of the heart-shaped diamond helps make it a distinctive choice for a variety of diamond jewellery. When choosing a colour grade, consider that while the price of a J-colour heart shaped diamond is exceptional, colour may be slightly visible in its corners.

Cushion

This unique shape has been popular for more than a century. Cushion-cut diamonds (also known as "pillow-cut" diamonds) have rounded corners and larger facets to increase their brilliance. These larger facets highlight the diamond's clarity, so if you choose an SI clarity grade, be sure to review the clarity plot on the diamond certificate. Cushion-cut diamonds are available in shapes ranging from square to rectangular.

Cut

The Cut is a diamond's most important characteristic. It has the greatest overall influence on a diamond's beauty. It determines what we generally think of as sparkle.

Amprii suggests selecting the highest cut grade within your budget. The reason is simple: of the Four Cs, no other characteristic has a greater influence on a diamond's appearance.

A diamond's cut grade is an objective measure of a diamond's light performance, or, what we generally think of as sparkle. When a diamond is cut with the proper proportions, light is returned out of the top of the diamond (which gemmologists refer to as the table). If it is cut too shallow, light leaks out of the bottom; too deep and it escapes out of the side.


Light Reflection of Diamonds
Cut Grades

Ideal Cut

Represents roughly the top 3% of diamond quality based on cut. Reflects nearly all light that enters the diamond. An exquisite and rare cut.

Very Good Cut

Represents roughly the top 15% of diamond quality based on cut. Reflects nearly as much light as the ideal cut, but for a lower price.

Good Cut

Represents roughly the top 25% of diamond quality based on cut. Reflects most light that enters. Much less expensive than a very good cut.

Fair Cut

Represents roughly the top 35% of diamond quality based on cut. Still a quality diamond, but a fair cut will not be as brilliant as a good cut.

Poor Cut

Diamonds that are generally so deep and narrow or shallow and wide that they lose most of the light out the sides and bottom.


Colour

A diamond's colour is in truth its lack of colour. The diamonds that are white and containing little or no colour are graded higher than those with visible colour.

A colour grade of D is the highest possible, while Z is the lowest.

Colour manifests itself in a diamond as a pale yellow. This is why a diamond's colour grade is based on its lack of colour. The less colour a diamond has, the higher its colour grade. After cut, colour is generally considered the second most important characteristic when selecting a diamond. This is because the human eye tends to detect a diamond's sparkle (light performance) first, and colour second.

With Amprii you will find only the finest diamonds with colour graded D-J. Diamonds graded J or better are colourless or near-colourless, with colour that is typically undetectable to the unaided eye.

Diamond Colour

D

Absolutely colourless. The highest colour grade. Extremely rare.

F-E

Colourless. Minute traces of colour can be detected by an expert gemologist. A rare diamond.

H-G

Near-colourless. Colour difficult to detect unless compared side-by-side against diamonds of better grades. An excellent value.

J-I

Near-colourless. An exceptional value with slightly detectable warmth or tone.

M-K

Noticeable Colour

Z-N

Noticeable Colour


Clarity

Clarity is a measure of the number and size of the tiny imperfections that occur in almost all diamonds. Gemmologists refer to these imperfections by a variety of technical names, including blemishes and inclusions, among others. Many of these imperfections are microscopic, and do not affect a diamond's beauty in any discernible way.

Diamonds with the least and smallest imperfections receive the highest clarity grades.

Diamond Clarity

Fl, IF

Flawless, Internally Flawless: No internal or external imperfections. Internally Flawless: No internal imperfections. Very rare.

VVS1,VVS2

Very, Very Slightly Included: Very difficult to see imperfections under 10x magnification. An excellent quality diamond.

VS1, VS2

Very Slightly Included: Imperfections are not typically visible to the unaided eye. Less expensive than the VVS1 or VVS2 grades.

SI1,SI2

Slightly Included: Imperfections are visible under 10x magnification, and may be visible with the unaided eye. A good diamond value.

I1,I2,I3

Included: Imperfections are visible under the naked eye. Least expensive

 


Carat Weight

This is the most commonly referred to characteristic and one that most people recognise.  Carat is specifically a measure of a diamond's weight, and by itself may not accurately reflect a diamond's size.

We tend to evaluate diamond size by viewing it from the top because that is how diamonds are presented to us when set into a ring.

In order to understand diamond size, Carat weight should also be considered in conjunction with two other criteria:

  • Distance in millimetres across the top of the diamond.
  • Diamond's cut grade.

It is important to measure the distance across the top of the diamond as this is how we view a stone when set into a ring.

A diamond's cut grade should also be considered because, as we noted in the cut grade section, when a diamond is cut with the proper proportions, the maximum amount of light (or sparkle) is returned out of the top of the diamond. Thus, when a diamond is well cut, the light reflected out of the top makes it appear larger. In addition, much of the weight of a poorly cut diamond, for example, may be "hidden" in the base of the diamond, making the diamond appear smaller than its carat weight would imply.

It is therefore possible to have a diamond of a lower carat weight, but higher cut grade that appears larger than a diamond with a larger carat weight, but poor cut.

Once you've selected your cut, colour, and clarity grade, it's easy to determine the carat weight of diamond that will fit within your budget.

Certification

Every certified Amprii diamond is accompanied by an unbiased diamond grading report.

Before purchasing a diamond, you should expect to review a copy of its certificate as proof that it has undergone an unbiased, professional examination.

What is a Certificate?

A diamond certificate, also called a diamond grading report, diamond dossier®, or , is a report created by a team of gemmologists.

The diamond is evaluated, measured, and scrutinized using trained eyes, a jeweller’s loupe, a microscope, and other industry tools. A completed certificate includes an analysis of the diamond’s dimensions, clarity, colour, polish, symmetry, and other characteristics.

Many round diamonds will also include a cut grade on the report.