Diamond information

Bonds of Brentwood is at the forefront of the diam…
So what do we do? We are an international diamond wholesaler and we source and distribute diamonds from all over the world. With strong ties to Israel we can offer you a fantastic variety of precious stones and metals and we pride ourselves on supplying our customers with exactly what they want.
Whether it is an original piece of jewellery you want, or if you want to alter something you already own, we are on hand to help you get the best out of your jewellery whilst still getting the special buying experience.
So be sure to look through our stock and find yourself something special, whether it’s for yourself, or for someone special.

Diamond Certification

Making sure you purchase a certified diamond is integral. A diamond certificate is issued following an unbiased and professional examination of a stone to ensure a stone is what it says it is.

The stones’ carat weight, clarity, colour and exact measurements are all validated and in reference to the Round shape, the cut grade is also checked.

The reason certificates are so important is because they provide written evidence that proves or testifies a stones value. However with smaller stones (0.30ct or below) certificates are not always necessary. But any stone that is above that weight must be bought with a certificate so that you know the exact grade and value of your purchase.

Diamond Clarity

Diamond clarity relates to the way a stone looks. It involves judging how many internal characteristics, known as inclusions and and surface imperfections (blemishes) a stone has. Diamond clarity relates to the four ‘Cs’ of diamond grading, the others being carat, colour and cut. See the other sections for more information on the other ‘Cs’.

Inclusions can be anything from crystals from a foreign material or another diamond crystal. They can also be structural imperfections such as minuscule structural defects, that look white and cloudy.
Even though most inclusions within stones don’t effect the structural integrity and performance of a stone. Some especially large clouds, that change the clarity of the gem can hinder the diamonds ability to project the sparkly look we all love.

It is important to get the highest clarity you can afford because it deeply effects the overall performance of the stone on your chosen piece of jewellery.

Diamond Grading

Diamond clarity relates to the way a stone looks. It involves judging how many internal characteristics, known as inclusions and and surface imperfections (blemishes) a stone has. Diamond clarity relates to the four ‘Cs’ of diamond grading, the others being carat, colour and cut. See the other sections for more information on the other ‘Cs’.

Inclusions can be anything from crystals from a foreign material or another diamond crystal. They can also be structural imperfections such as minuscule structural defects, that look white and cloudy.
Even though most inclusions within stones don’t effect the structural integrity and performance of a stone. Some especially large clouds, that change the clarity of the gem can hinder the diamonds ability to project the sparkly look we all love.

It is important to get the highest clarity you can afford because it deeply effects the overall performance of the stone on your chosen piece of jewellery.

Diamond cutting

Bonds of Brentwood is at the forefront of the diam…

So what do we do? We are an international diamond wholesaler and we source and distribute diamonds from all over the world. With strong ties to Israel we can offer you a fantastic variety of precious stones and metals and we pride ourselves on supplying our customers with exactly what they want.

Whether it is an original piece of jewellery you want, or if you want to alter something you already own, we are on hand to help you get the best out of your jewellery whilst still getting the special buying experience.

So be sure to look through our stock and find yourself something special, whether it’s for yourself, or for someone special.

Diamond cutting is the process in which a diamond is cut from the ground and changed into the faceted gems we all know and love. The cutting process requires specialised equipment and skills in order to get the most out of the roughs (a diamonds original form) which is mined for, all over the world.

Diamond cutting is concentrated in a few cities around the world with Antwerp, Belgium handling over 80% of rough diamonds, and other important cities, including New York City, Tel Aviv and Gujarat in India.

When someone refers to a diamond’s cut it can mean two things, either it is the term used to describe the shape of a diamond i.e Oval, Round, Princess, see the Diamond shape section. Or it means the quality of cut within the shape of a stone. The quality of a diamonds cut will directly reflect on the overall price of a stone. The better the cut,the higher the price.

Because diamonds are one of natures hardest materials, specialised tools must be used to ensure the highest quality is obtained from the cut.

The Diamond Cutting Process
Planning

At the beginning of the cutting process, a rough is purchased and assessed on two factors. The first being, how much money can be made from its contents and the second being how a faceted gem can be cut from it. The inclusions within the stone are photographed and assessed and cutters use computerised systems, known as OGI machines to pin point the maximum that can be taken from the rough.

Maximizing value

When it comes to a stones value, cutters rely on two market factors, one being the consideration of what is popular in contemporary markets, for example the Round cut is popular within the engagement ring market. The other being, assessing how much money can be made from the potential weight and size of a stone, which refers to the process of weight retention. Another factor that has to be considered is the natural attributes of the rough and how they contribute to the gems that are cut from it.

Weight retention

The weight retention process analyses the best combinations of finished stones that can extracted from the rough stone. This process directly relates to the ‘per carat’ value of each of the combinations. For example, cutters assess what combinations could make the highest return, whether that combination is just one large stone, or several small stones cut from the large that could have a combined higher price.

There are usually two main rough shapes, an octahedron or a mades. Rounds and Princess shapes are the preferred shape with octahedron roughs, whilst mades roughs are more likely to produce better fancy cuts due to the natural inclination of the rough’s shape.

Other factors are taken into consideration in the planning stages of stone cutting, including colour retention and how quickly a stone will sell.

Diamond Shape

Diamond cutting is the process in which a diamond is cut from the ground and changed into the faceted gems we all know and love. The cutting process requires specialised equipment and skills in order to get the most out of the roughs (a diamonds original form) which is mined for, all over the world.

Diamond cutting is concentrated in a few cities around the world with Antwerp, Belgium handling over 80% of rough diamonds, and other important cities, including New York City, Tel Aviv and Gujarat in India.

When someone refers to a diamond’s cut it can mean two things, either it is the term used to describe the shape of a diamond i.e Oval, Round, Princess, see the Diamond shape section. Or it means the quality of cut within the shape of a stone. The quality of a diamonds cut will directly reflect on the overall price of a stone. The better the cut,the higher the price.

Because diamonds are one of natures hardest materials, specialised tools must be used to ensure the highest quality is obtained from the cut.

The Diamond Cutting Process
Planning

At the beginning of the cutting process, a rough is purchased and assessed on two factors. The first being, how much money can be made from its contents and the second being how a faceted gem can be cut from it. The inclusions within the stone are photographed and assessed and cutters use computerised systems, known as OGI machines to pin point the maximum that can be taken from the rough.

Maximizing value

When it comes to a stones value, cutters rely on two market factors, one being the consideration of what is popular in contemporary markets, for example the Round cut is popular within the engagement ring market. The other being, assessing how much money can be made from the potential weight and size of a stone, which refers to the process of weight retention. Another factor that has to be considered is the natural attributes of the rough and how they contribute to the gems that are cut from it.

Weight retention

The weight retention process analyses the best combinations of finished stones that can extracted from the rough stone. This process directly relates to the ‘per carat’ value of each of the combinations. For example, cutters assess what combinations could make the highest return, whether that combination is just one large stone, or several small stones cut from the large that could have a combined higher price.

There are usually two main rough shapes, an octahedron or a mades. Rounds and Princess shapes are the preferred shape with octahedron roughs, whilst mades roughs are more likely to produce better fancy cuts due to the natural inclination of the rough’s shape.

Other factors are taken into consideration in the planning stages of stone cutting, including colour retention and how quickly a stone will sell.

Diamond colour

The colour of a diamond is determined by the amount of impurities or structural defects there are within the stone and pure diamonds are perfectly transparent and colourless. The name given to coloured diamonds is ‘fancy colour diamonds’, like brown, yellow and pink to name just a few.

The way a colour is graded is by using a system involving the letter ‘D’ which refers to the purest colour grade and ‘Z’ which is more of a yellow/ brown colour. The grade of a stone is determined in laboratories, all over the world, for example GIA and EGL, who both certificate stones. See Certificate section.

Diamond Colours

White, Steel Grey, Blue, Yellow, Orange, Purple, Brown, Red, Green, Black & Pink

The more traditionally known white diamond is graded differently in comparison to other colours. Because the colour is so popular it’s graded separately in order to determine how colourless a stone is. D is the highest grade and Z is the lowest, both grades are extremely rare.

White Diamond Colour Grading

D
Absolutely colourless: The highest colour grade where there’s absolutely no colour present within the stone. This colour grade is extremely rare.

E-F
Colourless: Some tiny traces of colour can be identified by an expert. This stone is still very rare.

G-H
Near-colourless: The traces of colour are difficult to detect unless the stone is placed side by side next to another stone of a better grade. This stone is fantastic value.

I-J
Near-colourless:Some traces of warmth and tone but is still brilliant value.

K-M
Noticeable Colour: Visibly noticeable colour.

N-Z
Noticeable Colour: Visibly noticeable colour.