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DIAMOND PROCESS

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JODHANI GRADING METHODS (JGM)

                 When it comes to diamonds, there aren’t many intangibles. Nearly every aspect of the diamond is precisely weighed, measured, benchmarked, and graded in order to properly disclose its 4 C’s and selecting the shape and verifying the stone are also the important 2 C’s.

DIAMOND CARAT

                 Diamond carat is its weight and reflects the diamond’s size. The larger the diamond, the rarer and more valuable it becomes. Carat is the most visible C. Not to be confused with karat, a 1.00-carat diamond weighs 0.20 grams. The size of a diamond is measured in millimeters by length and width or in other words the diameter of the diamond. It typically takes about 250 tons of rock mining to produce just 1.00ct of a diamond. That is why diamonds are rare and expensive. At Jodhani Brothers Diamond Carat is measured by using a highly precise electronic scale...

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0.02ct.

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0.03ct.

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0.04ct.

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0.05ct.

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0.10ct.

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0.15ct.

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0.20ct.

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0.25ct.

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0.33ct.

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0.50ct.

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0.60ct.

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0.75ct.

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0.90ct.

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1.00ct.

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1.25ct.

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1.50ct.

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1.75ct.

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2.00ct.

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2.25ct.

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2.50ct.

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2.75ct.

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3.00ct.

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3.50ct.

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4.00ct.

                 Diamonds within each carat range have average millimeter sizes so you can approximate their visual size. Although each diamond is unique, these millimeter measurements are typically the norm, especially since diamonds today are cut with machines to ensure precision. To truly understand the diamond’s size, evaluate the measurements. Well-cut Round diamonds have less depth than well-cut fancy-shaped diamonds (diamonds other than Round).


How important should carat be when buying a diamond?

                 Carat tends to be the most visual and popular of the 4 C's. Therefore some people will want to consider carat weight first. However, carat weight isn't the only thing that matters — it must be balanced.

                 When pricing diamonds, think about carat on one side, and the remaining 3 C’s – cut, color, clarity – on the other side. To stay within your budget, as you increase carat you may need to de-emphasize the other C’s. Conversely, if you increase the other C’s, you may need to choose a lower carat. A larger carat size will fill up more of the hand, but if you don't maximize for cut and clarity, that bigger diamond will have less sparkle.

DIAMOND CUT

                 Each diamond is assessed and graded on its cut quality - otherwise known as the diamond cut grade. A diamond cut grade is assessed on several factors such as brilliance, symmetry, polish and fire and ranges from excellent to poor. The higher the cut quality, the more sparkle the diamond is likely to have, so you should consider the cut when buying a diamond...

Types of diamond cuts

                 Each diamond is assessed and graded on its cut quality - otherwise known as the diamond cut grade. A diamond cut grade is assessed on several factors such as brilliance, symmetry, polish and fire and ranges from excellent to poor. The higher the cut quality, the more sparkle the diamond is likely to have, so you should consider the cut when buying a diamond.

EX

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VG

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GD

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FAIR

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POOR

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                 At Jodhani Brothers, the cut scale contains four grades ranging from Excellent to Fair. Excellent, Very Good, Good, and Fair. include poor cut

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EXCELLENT CUT DIAMOND
                 An excellent cut diamond is the best diamond cut and also the most beautiful. It means that it is perfectly proportional and has the best brilliance, symmetry, polish and fire. An excellent or ideal cut diamond reflects almost all the light that enters it, so it sparkles beautifully.
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VERY GOOD CUT DIAMOND
                 A very good cut diamond is almost the same compared to an excellent cut diamond. It still enables most of the light that enters it to reflect but attracts a lower price.
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GOOD CUT DIAMOND
                 A good cut diamond reflects a substantial amount of light that enters it. The diamond does not have the same amount of fire or brilliance that an excellent cut or very good cut diamond has, but it is a more affordable choice for those on a budget.
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FAIR CUT DIAMOND
                 A fair cut diamond typically reflects a small portion of light. For those looking to maximise the carat weight over other things, a fair cut diamond may be the only choice for a higher carat weight on a budget.
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POOR CUT DIAMOND
                 A poor cut diamond is a diamond that has been cut too deep or too shallow. When this occurs, the diamond will lose significant amounts of light. The only benefit of this type of diamond is the price. A diamond that is a poor cut will be significantly lower in price than any other

DIAMOND COLOR

                 A diamond's color is the soft tint of shade of yellow/brown that is seen inside the diamond. All diamonds on the GIA D through Z scale are considered white although on the lower end they can have a tinge of yellow color. Color is a natural element in diamonds. The more yellow/brown the tint of color, the less the sparkle of the diamond because light performance/reflection is reduced. Color is essentially a visual distraction that affects sparkle. The grade is a representation of how much that color shade can be seen. Diamond color is graded by evaluating the body color of the diamond on a pure white background, face down. From face up, color is harder to identify...

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DEF

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GHIJ

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KLM

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NOPQR

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S-Z

DIAMOND CLARITY

                 Diamond clarity refers to the assessment of imperfections either on the surface or within the diamond. Those with the least amount of defects will have a higher clarity grading. Flaws to the surface of the diamond are called blemishes and internal defects are known as inclusions...

                 Inclusions are natural and can appear black, grey or white in appearance. These imperfections are graded under x10 magnification, which is the standard for grading diamond clarity. Five grading factors which are considered are:

  • Number of inclusions
  • Position of inclusions
  • Nature of inclusions
  • Size of inclusions
  • Colour of inclusions

FL,IF

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VVS1,VVS2

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VS1,VS2

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SI1-SI3

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I1-I3

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FL,IF

         FL – IF (Flawless/Internally Flawless): Internally flawless. Diamonds in this grade have no visible flaws even when examined at x10 magnification.

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VVS1,VVS2

         VVS1/VVS2 (Very Very Slightly Included): Very, very slight inclusion. Diamonds with a VVS1 or VVS2 grade have barely any inclusions and these can only be found under very high magnification.

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VS1,VS2

         VS1/VS2 (Very Slightly Included): Contain minor inclusions that range from difficult to somewhat easy to see under 10x magnification. Typical VS inclusions are small crystals, feathers or distinct clouds. In some rare cases, a VS stone can contain an eye visible inclusion.

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SI1

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SI2,SI3

         SI1/SI2 (Slightly Included): Slight inclusions are easily found under x10 magnification. SI graded diamonds have small inclusions that will almost always be visible to the naked eye. SI clarity diamonds can offer exceptional value

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I1,I2

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I3

         I1-I3 (Included): Diamonds have numerous inclusions that can easily be seen. Diamonds of this clarity represent incredible value compared with higher clarity grades. These diamonds are perfect for people not sensitive to the presence of inclusions, but want a larger size of diamond.

DIAMOND SHAPES (Contour)

                 A diamond shape is otherwise known as the geometric shape of a diamond or silhouette. Often, a diamond shape is known as a cut, and the different diamond cuts can be referred to as either round or fancy shape diamonds. Fancy shape diamonds are any shape that isn’t a round brilliant diamond. Jodhani Brothers fancy shape diamonds include; princess, cushion, emerald, oval, pear, marquise, heart and Types of diamond shapes and what they are best for Round Brilliant Cut Diamond...

                 The round brilliant diamond is the most popular shape due to its timeless appearance and beauty. It tends to generate the highest amount of sparkle due to its large number of facets. Round brilliant diamonds are cut to optimize brilliance, featuring over 56 facets that reflect light and cast tiny rainbows in a breathtaking show of sparkle and contrast...

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Round Brilliant Cut Diamond

                 The round brilliant diamond is the most popular shape due to its timeless appearance and beauty. It tends to generate the highest amount of sparkle due to its large number of facets. Round brilliant diamonds are cut to optimize brilliance, featuring over 56 facets that reflect light and cast tiny rainbows in a breathtaking show of sparkle and contrast.

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Cushion Cut Diamond

                 The cushion cut diamond features rounded corners and large facets to increase brilliance. This diamond shape is loved for its timeless appeal and has been a favourite for over a century.
                 As its name suggests, the cushion cut is a square or rectangular shape with rounded corners, resembling a pillow shape. One of the rarer and more unique choices, the cushion cut’s large facets allow for great light dispersion, giving birth to a much larger range of spectral colours and making for a highly scintillating stone.

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Emerald-cut diamonds

                 Emerald-cut diamonds are sought after for their understated glamour and eye-catching depth. This octagonal step cut features parallel, rectangular facets, and it is the large, open table that highlights the stone’s pure color and elegant finish. The emerald cut is a suitable choice for engagement ring style.

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Princess-cut Diamonds

                 Beloved for its contemporary style and sparkle, the princess cut is the most popular fancy shape diamond. Princess-cut diamonds are square modified brilliant cuts with pointed corners. Boasting over 50 chevron-shaped facets, this cut is defined by exceptional fire and scintillation. Depending on the length-to-width ratio, princess-cut diamonds can appear square or rectangular.

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Radiant cut diamonds

                 A square- or rectangular-shaped hybrid cut that combines the brilliance and depth of the round, emerald and princess cuts, the radiant is the most brilliant of all the squared shapes making it both a beautiful and dramatic choice.

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Pear-shaped Diamonds

                 Infamously given to Elizabeth Taylor by two-time-husband Richard Burton, the pear shape combines round brilliant and marquise-cut styles to form a tapered teardrop with an extraordinary display of light. Like oval and marquise diamonds, the flattering pear shape elongates the finger—especially when worn with the point facing the nail.

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Heart-shaped Diamonds

                 Heart-shaped gems are classic symbols of love, cut with a precise length-to-width ratio to ensure expertly symmetrical curves. Sentimental and as rare as true connection, the heart-shaped diamond is an excellent choice for the classic romantic.

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Oval Diamonds

                 The oval shape is an elegant combination of the round brilliant cut and the marquise diamond. This brilliant cut features shimmering facets that make the light dance and create the illusion of longer fingers. Bold and sophisticated, the oval diamond is a unique shape for the wearer who wants to express their individuality.

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Asscher cut diamonds

                 Replete with timeless elegance, the Asscher cut is a rectangular shape similar to the more well-known emerald cut, with prismatic brilliance, tremendous lustre and a fascinating optical illusion known as the "Hall of Mirrors" effect.

CERTIFICATION

                 At Jodhani Brothers confidence and credibility is important to us. Ensuring your diamond is certified by one of the leading independent and recognised certification laboratories is essential for an unbiased assessment of the stone's quality.

                 A diamond certification is an impartial summary of the authenticity of a diamond and the specifications such as carat, clarity and cut etc, carried out by expert gemologist at diamond laboratories. This document is important as it provides the buyer with reassurance. GIA, HRD, IGI & EGL are the leading grading bodies in the diamond industry.

DIAMOND ANATOMY

                 When assessing a diamond’s quality, the 4 Cs provide a very reliable overview. Yet a gemologist or experienced diamond buyer looks beyond the 4 Cs at even more subtle details. These details include the diamond’s structure and its angles, its level of fluorescence, the degree of inclusions, and the quality of its polish..

THE DIAMOND STRUCTURE

                 A diamond is made up of two key sections, the Crown and the Pavilion. Their structure and relationship to each other in the form of table and depth percentages have the biggest impact on the diamond’s sparkle.

                 The round brilliant cut has been used as an example, because with most other diamond shapes (“fancy cut” diamonds) the cut grading is more complicated (hence why their cut grading does not appear on certificates such as GIA).

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  • Diameter:Width of the diamond at the widest point of the girdle (in fancy cut diamonds, the smallest diameter is used).
  • Table:The largest facet at the top
  • Crown:The top part of the diamond between the girdle and the table
  • Girdle:The narrow band at the diamond’s widest point
  • Pavilion:The bottom part of the diamond between the girdle and the culet
  • Culet:The fact at the bottom tip (preferable when not visible to the naked eye)
  • Depth:The height of a diamond from the table to the culet

DIAMOND POLISH

                 Polish refers to the degree of smoothness of each facet of a diamond. It is the diamond cutters art in unleashing the color and beauty within diamond. A quality polish eliminates the unwanted material on the stone and enhances the intensity of light reflected from a diamond.

Polish Grade Table
Excellent/Ideal

Diamonds with ideal or excellent polish can enhance overall appearance of the stone. Excellent polish in a diamond means that there are no polish defects (i.e. pits, chips, polish lines or scratches) visible at all under 10x magnification or to the naked eye.
Very Good

Diamonds with very good polish can improve overall appearance of the stone. Very Good polish in a diamond means that there are only faint polish lines that can be noticed under 10x magnification with extreme difficulty but are not visible to the naked eye.
Good

Diamonds with good polish improve the look of the stone. Good polish in a diamond means that there are small transparent polish lines that can be noticed under 10x magnification with difficulty, but remain invisible to the naked eye.
Fair

Diamonds with fair polish are less brilliant and are less desirable. Fair polish in a diamond means that defects can be noticed under 10x magnification and can also be visible to the naked eye.
Poor

Diamonds with poor polish look dull and affect the overall appearance of the stone. Poor polish in a diamond means that defects can be noticed under 10x magnification and are even clearly visible to the naked eye.

DIAMOND SYMMETRY

                 When grading a diamond, a gemologist evaluates the symmetry of its facets. Symmetry is an important factor in a diamond’s cut grade, and this is reflected in diamond pricing: A diamond with Excellent symmetry and polish may cost 10 to 15% more than a diamond with Good symmetry and polish.

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Excellent symmetry

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Very good symmetry
(Table off center)

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good symmetry
(Facets misaligned)

                 Why is symmetry important? When all the facets of a diamond are perfectly aligned, the light entering it is reflected back, creating brilliance. When the facets do not align well, less light is reflected, creating shadowed spots.

                 Diamond symmetry is graded on a scale from Excellent to Poor. Excellent symmetry indicates perfect alignment of all facets. A diamond's symmetry can be compromised if the culet and table are off-center, if the facets are misshapen, or if the girdle is not straight. A misalignment of the crown and girdle is also a symmetry flaw.

                 The symmetry grade of a certified diamond is shown on its grading report. Jodhani Brothers does not offer diamonds with Fair or Poor symmetry grades, so you can be sure of your diamond's superior brilliance.

DIAMOND FLUORESCENCE

                 The fluorescence in a diamond refers to a kind of illumination that it demonstrates when exposed to ultraviolet radiation. It can also be described as the propensity of a diamond to produce a soft blue colored shine when it is subjected to ultraviolet rays. There are two factors that should be observed when looking for diamond fluorescence. First being the color of the fluorescence and second is the strength of fluorescence. Though it is believed that fluorescence can augment or diminish the beauty of a diamond, but overall it should not be a key factor in the purchase of a diamond.

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None

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Faint

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Medium

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Strong

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Very strong

None

No fluorescence is found hence there is no influence on color of a diamond.
Faint

Weak fluorescence is observed and hence it does not have much significance on the color of a diamond.
Medium

Average fluorescence is observed which has a minute influence on color of the diamond.
Strong

There is a strong influence observed which has a significant influence on the color of a diamond.
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