JUWELDIA&GOLDGROUP

 Diamond trade&Offertas

"We are looking for diamonds of any kind, such as e.g. Brilliant cut, oval cut, marquise, cushion cut, emerald cut or even emerald cut, princess cut, drop or the famous heart cut diamonds. White diamonds in the colors D, E, F, G, H as well as colored or colored diamonds in red, yellow, brown and old cut diamonds. When selling diamond, we will make you an offer!

Also jewelery from gold e.g. we buy a gold necklace with a diamond. Jewelery with diamonds are also valued by us. Gold brooches with diamonds, rings with diamonds are also bought at the diamond purchase. 

Diamonds The 4c

The 4c of the diamond determine its individual value. The diamond Not only is its specific weight given in carat (ct) is an indicator of its value even thcut and even more important the color of the diamond determine its value. The purity of a diamond is also very important for the price design, so it is always recommended to have a diamond evaluation carried out directly in our laboratories. 

These are the 4 most important factors for pricing in the diamond trade 

Cut - Claity - Carat - Color - Cut - Purity - Weight - Color  

Purity scale

FLAWLESS (FL - LUPENREIN (LR)) Even at 10x magnification no internal and no external errors. INTERNALLY FLAWLESS (IF - internally flawless) lack of inclusions at 10x magnification, i. practically smaller than about 5 μm. Purely. You can also find the following names: magnifier pure at 10x magnification or Loupe Clean (LC).

VVS1

VVS2 Minimal inclusions, only very difficult to recognize with 10x magnification.

VVS = Very Very Small Inclusion (s).

VS1

VS2 Very small inclusions, difficult to recognize with 10x magnification.

VS = Very Small Inclusion (s).

SI1

SI2

SI3 Small inclusions, easily recognizable by 10x magnification, not visible to the naked eye from the crown. Note that the SI3 classification is not recognized by the Expertise Laboratories (GIA, HRD, etc.) but is used by the Diamondaires and appears in the Rapaport.

SI = small inclusion.

P1 inclusions, easily recognizable at 10x magnification, difficult to see with the naked eye of the crown, but does not diminish the brilliance.

P1 = pique 1 (pike 1).

P2 Large and / or numerous inclusions, easily visible to the naked eye from the side and from the crown, diminish the brilliance faintly.

P2 = pique 2 (pike 2).

P3 Large and / or numerous inclusions, easily visible to the naked eye from the side of the crown, significantly reduce the brilliance.

P3 = Pique 3 (Pike 3).

The viewer  The eye has to be well rested. The light

The light must correspond to the light that shines at mid-latitude around noon in a cloudless sky: continuous emission spectrum with increased blue content; This corresponds to the radiation of a black body at 7,000 K (Kelvin), which requires the use of a filtered light source.

The daylight of the neon tube is unsuitable even at a color temperature of 7,000 K (Kelvin), since the emission rays in the blue region amplify the fluorescence of certain diamonds.

Daylight, which contains a lot of ultraviolet light (sea - mountains) changes the appearance of a diamond: For this reason, the fluorescence of a diamond must be stated.

The stone

The stone must be clean (a dirty rondiste darkens the diamond and changes its appearance). Beware of stones with traces of blue pencil on which the vial is covered (these marks must be removed before assessing the color).

The stone must not be caught. method The stone to be tested must be compared with sample stones whose color corresponds to the generally accepted limit values.

The stone is examined on white cardboard with angle of incidence of about 30 ° to the pavilion (crown), so as not to be disturbed by the fire and the brilliance.

It is important to know how the colors and stones behave in relation to the general limits.

A sample stone is a non-fluorescent diamond that is pure inside (optimally intelligent VS2) of a size that matches most of the diamonds to be tested, with correct proportions and a color that is close to a limit on the conventional scale.

If you have two patterns "a" and "b" that behave as shown below to the conventional limits, then:

is a diamond that has the same or a higher color tone than "a", at least "F".

is a diamond that has the same or a higher hue than "b", at most "H".

is a diamond whose hue is between "a" and "b", "G". The ideal pattern stone is the stone, which is located exactly on the threshold between two levels. Example: a stone "X", which is located on the threshold between the levels of super fine white (E) and super fine white + (F).

The results

Very fine white +

Very fine white D

E The diamond disappears on the paper, so to speak.

Fine white +

Fine white F

G A slight tint can be seen from the side.

White H Clear tint from the side, hard to recognize from above.

Slightly tinted white I - J There is a slight tint from above.

Tinted white K - L Tinting is easy to determine from the top.

Tinted M - Z Tinting is very easy to recognize from above (sometimes referred to as Tinted 1, Tinted 2, Tinted 3, Tinted 4 - depending on the intensity of this Tint).

The Color

The color scale starts with the letter "D", there is no A, B or C. Some say that this color scale starts with the letter "D" because the first letter of the word Diamond ("Diamond") is a "D".

The color "D" is therefore the best possible grade for a diamond: such a color is completely colorless. The further you go in the alphabet (the color scale), the more intense the color of the diamond. The color "Z" stands for the worst grade, and such a diamond has a yellow color. Color scale for diamonds GIA Antwerp E.O. AGS CIBJO - IDC Scand. default  Colorless D 0+ 95 0 High Fine

Very fine white +

Very fine white D

E The diamond disappears on the paper, so to speak.

Fine white +

Fine white F

G A slight tint can be seen from the side.

White H Clear tint from the side, hard to recognize from above.

Slightly tinted white I - J There is a slight tint from above.

Tinted white K - L Tinting is easy to determine from the top.

Tinted M - Z Tinting is very easy to recognize from above (sometimes referred to as Tinted 1, Tinted 2, Tinted 3, Tinted 4 - depending on the intensity of this Tint).

Scale starts with the letter "D", there is no A, B or C.

Some say that this color scale starts with the letter "D" because the first letter of the word Diamond ("Diamond") is a "D".

The color "D" is therefore the best possible grade for a diamond: such a color is completely colorless. The further you go in the alphabet (the color scale), the more intense the color of the diamond. The color "Z" stands for the worst grade, and such a diamond has a yellow color.

Color scale for diamonds

GIA Antwerp E.O. AGS CIBJO - IDC Scand. default

Colorless D 0+ 95 0 High Fine White + River

E 0 90 1 Very fine white

F 1+ 85 2 Fine White + Top Wesselton

near

Colorless G 1 80 3 Fine white

H 2 75 4 white Wesselton

I 3 70 5 Lightly tinted white Top Crystal

J 4 60 Crystal

faint

Yellow K 5 55 6 Tinted White Top Cape

L 6 50

M 7 45 7 Toned Cape

Very

Light

Yellow 8 40 N

O 9 35 8 Light Yellow

P 10

Q 11

R 12 9

Light

Yellow 13 Yellow S

T 14

U 15

V 16 10

W 17

X 18

Y 19

Z 20

Color scale for diamonds weighing over 0.46 carats.