Golden Jubilee Diamond

The Golden Jubilee is currently the largest faceted diamond in the world. Since 1908, also known as the Great Star of Africa, had held the title, which changed following the 1985 discovery of a large brown diamond of 755.5 carats (151 g) in the prolific blue ground of the Premier mine in South Africa; the diamond would later be cut to a weight of 545.67 carats (109.13 g).

The Premier mine was also the origin of the Cullinan diamonds in 1905, as well as other notables such as the Taylor-Burton in 1966 and the Centenary in 1986.
The "Unnamed Brown", as the Golden Jubilee was first known, was considered something of an ugly duckling by most. It was given to Gabriel Tolkowsky by De Beers for the purpose of testing special tools and cutting methods which had been developed for intended use on the flawless D-colour ("colourless") Centenary. These tools and methods had never been tested before, and the "Unnamed Brown" seemed the perfect guinea pig; it would be of no great loss should something go amiss.
To the surprise of all concerned, what resulted was a yellow-brown diamond in a fire rose cushion cut, outweighing Cullinan I by 15.37 carats (3.07 g). The stone remained largely unknown to the outside world, as the Golden Jubilee's sister, the Centenary, had already been selected and promoted to herald De Beer's centennial celebrations in 1988.
The unnamed diamond had earlier been brought to Thailand by the Thai Diamond Manufacturers Association to be exhibited in the Thai Board of Investment Exhibition in Laem Chabang. There was a mile-long queue to see the diamond, which outshone all other exhibits.
While the current whereabouts of the Centenary are unknown, the Golden Jubilee is known to have been purchased from De Beers by a group led by Henry Ho of Thailand in 1995. The diamond was brought to Pope John Paul II in the Vatican to receive the papal blessing. It was also blessed by the Supreme Buddhist Patriarch and the Supreme Imam in Thailand. The Golden Jubilee Diamond (Thai: เพชรกาญจนาภิเษก) was named by King Bhumibol Adulyadej and given to him in honour of his 50th coronation anniversary. It was initially planned to mount the Golden Jubilee in the royal scepter. A subsequent plan was to have it mounted in a royal seal.
The Golden Jubilee Diamond has been exhibited at Henry Ho's 59-story Jewelry Trade Center in Bangkok, the Central Department Store in Lad Prao (Bangkok) Thailand, and internationally in Basel (Switzerland), Borsheims in Omaha, USA (owned by Warren Buffett's Berkshire Hathaway Inc.), and Gleims Jewelers in Palo Alto, USA. It is now located in the Royal Thai Palace as part of the crown jewels.


http://www.browndiamonds.in/



Fluorescence:

Fluorescence (a variety of luminescence) is the light radiation due to a reaction of the material atoms when exposed to incident light.
Emission of light by a diamond when exposed to ultraviolet radiation is termed as Fluorescence.In better colors presence of Fluorescence reduces the Brilliance of the stone while in weaker colors presence of Fluorescence adds more Brilliance to the stone.
We grade Fluorescence as follows:

www.browndiamonds.in

We do provide Fluorescence Color also if any.
Fluorescence colors like White, Blue, Yellow, Green, and Orange are having direct impact on the overall color of the diamond.
Depending on the nature and type of bonds that other elements form With Carbon atoms of a diamond crystal, fluorescence can be of different colors.

Luster:

Luster is basically the light reflected from the surface of the diamond.
It is also referred to as Brilliance, Sparkle or Fire. Luster plays very important role as it is directly related to the beauty of the diamond from its Face Up.

www.browndiamonds.in

Naked Eye Appeal:

Naked Eye Appeal is Universal Term accepted by majority of the Customers.
We want to give our Customers grades for Naked Eye Appeal for more advanced understanding of the Beauty Of Diamonds from its Face Up.
Naked Eye Appeal the word itself describe its meaning, generally customers before finalizing a diamond for buying see its impact naked eye.
We grade naked eye appeal on the basis of Diamond's Make (Cut),Color tone from Face Up & Impact of Inclusion from Face Up.
We Grade Naked Eye Appeal as Follows :

www.browndiamonds.in

Internal Graining:

Internal Graining are lines, Angles or curves that might appear whitish, colored or reflective or affect transparency at 10X, caused by irregularities in crystal growth. Internal Graining are not invisible to the naked eye.
We do provide grades for Internal Graining in the stones. Internal Graining also affects the face up look of the stone. Thus becomes important to grade them.
We grade Fluorescence as follows:

www.browndiamonds.in

IG 0 indicates No Internal Graining.
IG 1 indicates very light internal graining. They are not easily visible. We have to search them precisely through 10X loupe. Thus it doesn't affect Face up look of the stone to the great extent.
IG 2 indicates Medium Internal Graining. They are easily visible through 10X loupe.It does affect the Face Up look of the stone.
IG 3 indicates Heavy Internal Graining. They affect the overall Face up of the stone. Sometimes in higher clarity grade due to its heavy impact Clarity of the stone is also downgraded.
{Note: We grade Internal Graining in the stones having Clarity SI3 & better towards VVS1}

Open Inclusions:

We do provide grades for Open Inclusions in the stones, as opens are also very much imp as far as providing the information to the customer is concerned.
When inclusions within the Diamonds are open near the surface then such flaws are called Opens. It can be a chip, nick, pit or cavity. Naturals on the surface are also considered in Opens.
We also provide location of the Open Inclusion where it is located whether it's in Table or Crown or Pavilion.
Locations of the Open Inclusions are as below:
TOP  = Table Opens
COP = Crown Opens
Pop = Pavilion Opens
Grades for Open Inclusions:
Grades will remain the same as below in all the location whether it's TOP, COP or POP...
We grade open inclusions as follows:

www.browndiamonds.in

Black (Nartical) inclusion:

Black (Nartical) Inclusions: Out of the total inclusions present in the stone what proportion of them are black, grade of Black or Nartical inclusion is finalized.

We grade Black Inclusion as follows.

www.browndiamonds.in

NT 0 indicates No Black Inclusions are present in the stone. It's a No Black Stone.
NT 1 indicates Minor Inclusion (0 to 10% of the total) is Black in the Stone.
NT 2 indicates Medium Inclusion (10 to 35% of the total) is Black in the Stone.
NT 3 indicated Major Inclusion (35 to 80% of the total) is Black in the Stone.
NT 4 indicates Most Inclusion (80 % & above of the total) is Black in the Stone.

Table Inclusion:

Out of the total inclusions present in the stone what proportion of them are in table grade of table inclusion is finalized (Here Impact of the Inclusion plays very Important role in grading Table Inclusions). As some of the customers are choosy about inclusion in table they can make selection of the stone by looking at our info provided.

We Grade Table Inclusion as  follows :

www.browndiamonds.in

T0 indicates No Inclusions are present in the Table.
T1 indicates Minor inclusion (0 to 10% of the total) is present in the Table.
T2 indicates Medium Inclusion (10 to 35% of the total) is present in the Table.
T3 indicates Major Inclusion (35 to 80% of the total) is present in the Table.
T4 indicates Most Inclusion (80 % & above of the total) is present in the Table.

Relief of Inclusions:

Relief of Inclusions indicates Impact of Inclusions from Face-Up. As Relief of Inclusions plays a vital role while grading the Clarity of the stone, we take utmost care in grading Relief of Inclusion. We grade Relief of Inclusion from its overall impact from Face-Up.

We grade Relief of Inclusion as below:

www.browndiamonds.in

Explanation for Relief of Inclusions:


R0 Indicates No Relief of Inclusions. Mainly this grade will come in VVS2 Clarity as pin-point inclusions don't have any Relief from Face-Up.
R1 Indicates Minor Relief of Inclusions. Mainly this grade will come in VS1 or VS2 Clarity. As inclusions are very less in number & generally have Minor Relief from Face-Up.
R2 Indicates Medium Relief of Inclusions. Mainly this grade will come in SI1 or SI2 Clarity. As inclusions will create Slight or Medium Relief or Impact from Face-Up.
R3 Indicates Major Relief of Inclusions. Mainly this grade will come in SI3 or I1 Clarity as Inclusion will look hard from Face-Up in most of the cases.
R4 Indicates Obvious Relief of Inclusions. Mainly this grade will come in I2, I3 or I4 Clarity as Inclusions will look extremely hard from Face-Up. Their Relief can also be seen Naked Eye.
R5 Indicates heavy Relief of Inclusions Mainly this grade will come in I3, I4, I5, I6 Clarity as Inclusions will look very heavy from face-up. Their Relief can also be seen Naked Eye.

Inclusion Pattern

Inclusion Pattern:


One of the most important factors for informing our customers about the inclusions present in the stone is to Provide Pattern of Inclusion. Even without looking at the stone through Inclusion Pattern Customers can roughly imagine how the Diamond will look from face up. Whether inclusions are spreaded in the stone or concentrated. Inclusion Pattern also indicates how densely the inclusions are located within the Diamond.

Clarity Grading:

Clarity Grading:


Clarity is a gemstone's relative freedom from clarity characteristics, which are classified as inclusions and blemishes.Inclusions are enclosed within a diamond or they extend into the diamond from its surface. Blemishes are confined to the diamond's surface.Inclusions typically have more influence on a diamond's clarity grade than blemishes.

While Grading Clarity five factors plays very important role, which are as follows:


1) Size of Inclusions
2) Number of Inclusions
3) Position of Inclusions
4) Nature of Inclusions
5) Relief of Inclusions or Impact of Inclusions

www.browndiamonds.in

Symmetry:

Symmetry:

“Symmetry”refers to the exactness of the shape of a diamond, and the Symmetrical arrangement and even placement of the facet. Better the symmetry better is the light behavior, which results in an attractive diamond.
Symmetry is also assessed on a scale ranging from excellent to fair.

We Grade Symmetry as  follows:

www.browndiamonds.in

Polish in Brown Diamonds

Polish:

Polish refers to the smoothness of the surface of every facet that is cut into a raw diamond. This part of the diamond cutting process requires the utmost care and attention to minute detail. With modern technology, polish does not vary nearly as much now as it did in years past. Excellent polish greatly enhances a diamond's brilliance because it creates less diffusion as light enters and exits the diamond. Even a diamond with slight depth or symmetry problems will appear brilliant if the polish is of the highest grade.
Diamond Polish refers to how smooth the outside surface of a diamond has been polished. Polish is the quality of a Diamond's surface condition as a result of the polishing process or to blemishes created after the cutting process, often referred to as "wear and tear”. Polish features are located on the surface & do not visibly penetrate into the diamond at 10X Magnification.

We grade Polish as per below order :

www.browndiamonds.in

Cut in Brown Diamonds

All of the four C's have an effect on the beauty of a diamond, but the cut is most important factor. The cut (number of facets, proportions, symmetry, etc.) determines a diamond's brilliance. When light enters the top of the diamond, it reflects and refracts within the diamond. How light is directed through the number of facets and the placement of those facets in relationship to each other determine a diamond.
The way in which a diamond is cut determines how brilliant the diamond will be. A well-cut diamond reflects the maximum amount of light that enters it. The exact angles of the ideal cut diamond have been mathematically calculated and proven to reflect the maximum amount of light.

www.browndiamonds.in

Color & Color Hue

Color & Color Hue

As Color of Brown Diamond Plays a vital role in fetching more price & also it plays important role for Naked Eye Appeal of the stone, we take special care while grading color of the Brown Diamond.

Color: We grade color as follows:

www.browndiamonds.in

www.browndiamonds.in

As those dealing in Brown are very much aware of C1 to C7 color scale

We grade Light Champagne Brown Diamonds (C1 & C2) as Natural Fancy Very light Brown & Natural Fancy light Brown respectively. If they are Medium Champagne Brown Diamonds (C3 & C4) we grade them as Natural Fancy Medium Brown & Natural Fancy Brown respectively. If they are Dark Champagne Brown Diamonds (C5 & C6) we grade them as Natural Fancy Intense Brown & Natural Fancy Vivid Brown. If the Diamond is Fancy Cognac i.e. C7 we grade them as Natural Fancy Deep Brown. We also grade C8 if the Diamond's color is Fancy Very Rare Cognac as Natural Fancy Vibrant Brown.

Color Hue:

Light, Fancy Light, Fancy, Fancy Intense, Fancy Vivid and Fancy Dark are fancy grades representing the combined effect of tone and saturation on a certain hue. These fancy grades vary in intensity, in different hues since the highest saturation levels are reached in different levels of tones according to the hue. This phenomenon is apparent when one examines the asymmetrical appearance of the makeup of color space.
The Color Hue, which we are aware of in most cases, is Fancy Orange Brown (Mix tone or Hue of Orange & Brown). Fancy Pinkish Brown (Mix tone or Hue of Pink & Brown). Fancy Brownish Greenish Yellow (Mix tone or Hue of Brown,Green & Yellow). Like wise the grade is given as per the Hue or tone present in the Diamond.

Now for E.g.:

If our diamond is C7 i.e. Natural Fancy deep Brown with orange and red hue or color tone from face up. We will grade it as Natural Fancy deep reddish orangish Brown.  

C-1 To C-8 Brown Diamond's Color Grading Scale

C-1 To C-8 Brown Diamond's Color Grading Scale

Information about Brown Diamonds

Brown DiamondsWhat exactly are Brown Diamonds? Brown diamonds have a tint of brownish body color. Diamonds can occur in nearly any color, though yellow and brown are by far the most common. The Brown diamond is a member of the Carbon family and is the hardest substance known. The word Diamond is derived from the Greek word "adamas" which means "hardest metal" reflecting the property of the stone. Diamonds with a detectable hue, other than yellow or brown are known as colored diamonds. If the colour is strong enough, a stone may be referred to as a fancy colored diamond by the trade. There are Natural fancy color diamonds and Synthetic Color Diamonds. For more information on any of these subjects please refer to the Index.

Definition of Diamond Color
What is the Definition of a Brown Diamond? Colored diamonds contain impurities or structural defects that cause the coloration. The most common impurity, nitrogen, causes a slight to intense yellow coloration depending upon the type and concentration of nitrogen present. Brown “amber” diamond crystals show some deformation called “brown graining”. They also contain nitrogen.

Cost of Brown Diamonds
The Australian Argyle mines produce a significant quantity of brown diamonds. Brown diamonds are usually less expensive than any other colors due to the fact that they are less appealing to most consumers. The color descriptions of these diamonds are now described and marketed as Cognac or Champagne.

The Color Scale or Grade for Brown DiamondsArgyle Diamonds created the following scale for brown diamonds to separate them into their progressively darker tonal ranges which are described as follows:

• Very light brown (champagne)
• Medium brown (champagne)
• Brown (dark champagne)
• Dark brown (fancy cognac)

Diamond Color Scale or Grade for Brown Diamonds
Color	Diamond Color Scale or Grade
Light Champagne	C1 & C2
Medium Champagne	C3 & C4
Dark Champagne	C5 & C6
Fancy Cognac  & Fancy Very Rare Cognac	C7 & C8

Broucher

Choco-Brownie

Sand Color Collection

Ayers Rock Collection

Chocolate Color Collection

Walnut Color Collection

Coffee Color Collection

Honey Color Collection

Grand Canyon Collection

Cola Color Collection

Biscuit Color Collection

Almond COlor Collection

www.browndiamonds.in

Founder of the Company

Mr. Hiten Shah founder of the company started this business a decade ago from the ground level with his 10 years of relentless efforts and passion for brown diamonds he overcame many hurdles and reached this level.

Our company's vision is to be a departmental store for brown diamonds from where customer will find all shades, shapes, sizes and clarity of brown diamonds under the same roof.

We pride ourselves in providing services and guidance that matches the superior quality of our products. We believe in operating a genuine and ethical business.

As in fancy color diamonds there exists the great chance for fetching high prices from customers, but we don't take such chances and we believe in providing correct pricing to our customers. We quote the price as individual stone talks. We do believe in fast business without wasting much time of our customers.

Whatever be the occasion, whatever be the choice, we at S.P Gems always have something that matches our customer's sentiments.

S. P. Gems Pvt. Ltd. welcomes you all to join its family for experiencing passionate commitment towards ethical standards & Customer's satisfaction.