– Rocks Diamond Buying Guide –

A good understanding of diamonds is necessary before you begin shopping for a beautiful diamond that is just right! Our guide gives you all the necessary information on the all-important “four Cs” as well as additional information on all things diamonds. You will then be equipped to make the best decisons based on the simple, straight-forward informaition in this article.


Carat refers to the weight of a diamond not the size, however well proportioned diamond of a certain weight should be a certain size. One carat equals 0.200grams and contains 100 points.

Two diamonds of equal carat weight can have varying prices when you take into account other diamond factors such as colour, clarity and cut. As the carat size of a diamond increases, the diamond’s price increases at an increasing rate as larger diamonds are more rare.


The less colour in a white diamond, the more true colour it will reflect. The colour of diamonds is placed on a scale of D (colourless) through Z (light colour). Colour variations are very difficult to determine.

D, E. F diamonds are considered colourless; they are very rare and unique. Each of these colours is unique however the difference is only detectable by a gemmologist using side by side comparisons.

G, H, I, J diamonds are considered near colourless. While traces of colour are present the colour is not noticeable to the naked eye. When set in white gold or platinum the presence of colour is unnoticeable.

K, L, M diamonds have a faint colour. These diamonds can represent great value however the colour is detectable with the naked eye.

Diamond colours go all the way through to Z which present a yellow tint.


Clarity of a diamond is determined by the presence of, or lack thereof, of small imperfections within the diamond, known as inclusions. They are known are nature’s imprint on the diamond.

FL-IF Even under magnification, a skilled diamond grader, cannot detect any internal inclusions or flaws. These are the rarest diamonds and are much more expensive than VVS grade diamonds.

VVS1-VVS2 Using 10x magnification a diamond expert finds it very difficult to detect any inclusions or flaws. These are not visible to the naked eye.

VS1-VS2 Under magnification you can clearly see the diamond inclusions but they are very small. Again you cannot see these flaws with the naked eye.

SI1-SI2 Using 10x magnification the inclusions are obvious to a diamond grader. They are not normally visible to an untrained eye.

I1, I2, I3 – Inclusions are obvious and they sometimes affect the brilliance of the diamond.


In a well cut diamond, the light strikes each pavilion facet at an angle which allows most of the light to reflect back to the top. As it passes through the crown facets at a low angle, the light refracts upon exit. In this case, refraction is a good thing, as the bent light travels to the observer’s eye and is perceived as brilliance.


The shape of the diamond is very important when considering your diamond. There are many options and they all have their unique characteristics.

  • Round The round brilliant cut diamond is by far the most popular choice of diamond. Over the years this shape has been optimized to make sure it takes the maximum amount of light giving it a fantastic brilliance and sparkle. This shape is perfect for a diamond engagement ring.
  • Oval An oval cut diamond is very similar to a round brilliant cut diamond in its appearance. However it is a fraction longer with curved corners and straighter sides. For someone who has longer, slender fingers this shape of diamond is perfect in an engagement ring.
  • Marquise The marquise cut is a traditional shaped diamond which depending on the cut can get longer or wider as the carat weight increases. The brilliance of this stone is that it looks stunning in a diamond engagement ring or with other shaped stones such as round or princess.
  • Pear The pear shaped diamond is a traditional style and is also known as a tear drop shape. As the diamond increases in carat weight the stone becomes wider as opposed to longer. Fantastic choice for longer, slender fingers.
  • Heart A heart shaped diamond is one of the more romantic shaped diamonds.
  • Emerald – Due to the large table it highlights the clarity of the diamond and in SI clarity inclusions can be visible. The straight rectangular cuts make this modern shaped diamond a fantastic choice for any diamond engagement ring.
  • Princess – The princess cut is a square shape, it’s pointed corners set it apart from the other shapes of diamond available. In a diamond engagement ring it has an unrivalled sparkle and fire.
  • Radiant A radiant cut diamond is a similar shape to the emerald cut diamond but sparkles like a round brilliant cut. It has around 75 facets making it ideal for any style of ring or jewellery.


A diamond certificate is an evaluation of the diamond that is done by an independent company confirming the colour, clarity, and carat. You may see other names for these such as diamond grading reports, diamond dossiers and more.

Some of our diamonds are graded by a trained diamond grader and expert within Rocks Jewellers and the others are certified by GIA (Gemmological Institute of America), IGI (International Gemmological Institute), HRD (Hoge Rood Voor Diament). All diamonds that are certified will have their clarity, colour, carat and cut graded. They will also have the diamond measurements and fluorescence listed on the certificate.


A common question when a customer buys an eternity ring or a trilogy ring is will the diamonds be certified?

In an eternity ring there can be up to 30 stones in particular designs. These stones will also be around 10-15 points. In these ring Rocks Jewellers will grade these stones for you, keeping the costs down while still being reassured of the quality. You will receive a special certificate from us confirming the diamond grades of your diamond eternity ring or diamond tennis bracelet for example.

We hope you will find this information useful when you go to buying your diamond or engagement ring. Keeping all these factors in mind will give you the reassurance that you are making the perfect diamond choice for you!

If you would like to make an appointment to come in and talk to us and view some rings please do so here.

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Get The Look – Casual Style

Here is a little cosy causal inspiration to get you through this miserable weather! Below is everything you need to achieve that look.


H&M Mole Coloured Knitted Cardigan

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Only White Solid Sleeveless Top

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Penny’s Animal Print Pumps

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€8.00 (£6)


River Island Dark Blue Molly Jeggings

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MiMoneda Chain & Pendant

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River Island Tan Panel Bowler Bag

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Rosefield Gramercy Gold & Tan Leather Watch

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Rocks Jewellers has 2 stores in Dublin – Grafton Street & Stillorgan Village Shopping Centre. We have been in business over 40 years supplying the top jewellery and watch brands and creating handmade diamond jewellery too.

Our in house capabilities mean that we can create whatever your heart desires from bespoke Engagement Rings to Engraved Cufflinks. Our watchmakers can turn their hand to delicate repairs and simple battery replacements.

Take a look through all we have to offer www.rocks.ie



There are so many diamond simulants currently on the market and cubic zirconia stones are one of the most common of them all.  So how can someone tell a cubic zirconia from a diamond? Well it turns out it can be harder than you might think to tell the difference between them.

A diamond tester is one method, it is a machine that will tell you if the stone is a diamond, but it will not tell you what makes up the stone if it is not a diamond. Another method is using a jeweller’s loupe or a microscope. The jeweller or you can look through the top of the stone, focusing your vision toward the bottom facets of the stone.  If the lines appear doubled, like you have blurry vision, you ar looking into a sythetic stone.  If the lines are still singular, and very clear and distinct you have a real diamond.

You will also notice either through a loupe or micrscope the presence of inclusions or internal flaws. Because diamonds are naturally occuring stones they will have little inclusions within the stone, unless of course you have a flawless stone, these are rare and very expensive. Synthetic stones like cubic zirconia will have no flaws visible at all indicating it is not a diamond.  However, because some diamonds are flawless this method is not completely reliable but in most cases it will be a very good indication.

Home testing methods are great however use a jeweller you trust to take a look at your jewellery and give you peace of mind that what you have chersihed for so long is indeed the real thing.

So pop into us any time and we’ll take a look at your jewellery and appraise it for you. Contact us through www.rocks.ie to make appoinment or call Rocks Jewellers or 01 288 6156 or 01 613 9910


Citizen Watches as perfect gift ‘For Him’

Citizen watches have such an amazing choice that its no wonder it such a popular brand among all age groups. The Chronograph watches are great for 18-35 year olds who like to have additional features on their timepiece however the classic styles that Citizen also offer are a fantastic choice for the gentleman that prefers a clean elegant ad classic look. Anyones Dad or GRandad would appreciate a Citizen watch. Price wise they are a great alternatice to other pricey brands which quite frankly have less choice when it comes to style and often cater for one group or another. Take a look  online at www.rocks.ie and see the great choice. You’ll not be stuck for choice.