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Glydon & Guess is proud to offer a brilliant range of excellent quality jewellery services for our customers to choose from. With over 70 years’ experience, you will not be disappointed with the specialist services offered by Glydon & Guess. See below to find out about the services we provide.


There's no gift quite as special as the gift of diamonds. From exquisite diamond rings and pendants to irresistible earrings and bracelets, our diamond jewellery is perfectly-crafted. We always consider the importance of the cut, carat weight, colour, clarity and presence, our distinctive quality standard make our diamond pieces extraordinary.

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Some jewellery is a cut above the rest. We are proud to offer an exclusive range of breathtaking pieces made with the finest precious stones. Each tells a story unlike any other.

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At Glydon & Guess our heart and soul goes into every piece of jewellery leaving each piece flawless and of the very best quality. We know everything there is to know about jewellery, diamonds, gold, platinum and silver, so you can be sure you will be getting the best advice, valuation and craftsmanship available.

We are a traditional, family-run business that has over 77 years’ experience in the jewellery business. Designing and creating jewellery since 1941, we have an abundance of irreplaceable, invaluable knowledge and skill meaning we provide only the very best service.


With such extensive experience and dedication, Glydon & Guess never compromises on quality of service or work, meaning you can relax knowing your jewellery is in the very best hands. We do not let our customers down.

Style in every detail

Glydon & Guess is the leading jewellers in Kingston. Established in 1941, we are a traditional, family-run jewellers that has been offering top-quality customer service and outstanding jewellery for more than 70 years. We have a fantastic range of beautiful, high-quality jewellery collections and extensive jewellery services. Modern, antique and bespoke design.

Visit our showroom in Kingston and have a look at the wonderful pieces of jewellery we have to offer and the services we provide, or call us at 020 8546 3758 . We look forward to hearing from you.

Frequently asked questions

You'll find a selection of our frequently asked questions here.
If you cannot find the answer you're looking for, please reach out to us at 020 8546 3758


When buying diamonds and diamond jewellery, it is important to keep the four Cs in mind: Cut, Colour, Clarity and Carat weight – in that order. Below we take a look at each in more detail.

Cut – The cut of a diamond is the most important aspect of all four c’s. It will influence the sparkle; even if a diamond is perfect in colour and clarity, a poor cut will allow light to leak from the sides or bottom, ultimately reducing the sparkle effect when placed in a setting.

Colour – The less colour a diamond has, the higher its grading. Colour grading works on a scale of D through to Z. D is the highest grade and is extremely rare, Z grade diamonds have noticeable colour and are regarded as poor quality. Colour is important as it impacts transparency and therefore the way it reflects light to create the sparkle.

Clarity – Clarity of diamonds refers to blemishes (surface features) and inclusions (internal attributes). Most diamonds have tiny inclusions that are not visible to the naked eye. Diamonds with microscopic inclusions are known as ‘Eye-Clean’ as they are not marred by them and still help to create beautiful diamond rings or other jewellery.

Carat weight – Carat is a measurement of a diamond’s weight, not size. Cut and carat should be considered in tandem as higher carat diamonds with poor cuts often look smaller than diamonds with excellent cuts but lower carat weights.


Real diamonds have a few attributes that make them unmistakable from their cheaper, fake counterparts. The best way to find out is to have your diamonds or diamond jewellery appraised by a professional. However, if you would like to put your diamonds through a few simple tests at home you could try these:

Diamonds are superb heat conductors, if you breathe on them to create ‘fog’ it should disperse immediately. If the fog doesn’t disperse within a few seconds, it’s likely not to be a diamond.

Diamonds are one of the most dense gem stones. Drop it in water and it will sink. If it floats to the top or middle section of the water it’s not real.

Nearly all diamonds have tiny imperfections called inclusions. Look at your diamond through a magnifying glass – if you can’t see any small flaws, you may have a fake on your hands.

Diamonds show blue fluorescence in black light. Turn off your normal lights and place your diamond, or diamond jewellery under a black light, if it shines blue, it’s the real deal, other colours or none indicate the gem you have is not a diamond.


EGL certifications of diamonds come from the European Gemmological Laboratory, a for-profit organisation who provide diamond certifications more cheaply, and quicker than the GIA (Gemmological Institute of America). GIA certifications command more respect throughout the industry and have stricter rules when it comes to grading and certifying diamonds. However, GIA certifications cost more and sometimes take longer to complete the inspection of gems.


Diamonds are one of the hardest natural substances known to man, only surpassed by wurtzite boron nitride and lonsdaleite. Diamonds have lines of strength and weaknesses in them and impacting the right line can cause a diamond to shatter all the way to its end. Fortunately, this is a very rare occurrence. Often what is thought to be a crack or chip turns out to be an inclusion within the diamond and does not affect the strength of the gem. If a diamond is chipped, the only solution is to have it re-cut if it is large enough to do so.


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