Diamond is natural gemstone, which is formed in very high pressure and temperature conditions.

Diamond is supposed to be the hardest known natural substance, which is broadly used in industry as well as in jewelry.

Diamonds become a girl’s best friend only after careful handling of lapidary.

As diamonds are natural origin, there are no two the same kind. Therefore it is developed methodology for characterization and qualification of diamonds.

 

The methodology is based on 4 criteria, known as 4Cs:

Diamond color;

Diamond clarity;

Diamond carat;

Diamond cut.

 

One and most important factor, which affects value of the diamond, is its rarity, so the better condition of surface (absence of imperfections on surfaces or in the stone) and structure, the more perfect diamond you own. 

Diamond color

The most valuable diamonds are colorless, but never the less they can occur also in diverse colors. The diamonds can be divided in two groups- traditional colors and fancy colors. Traditional colors, which are majority, are in range of pale yellow or brown in different tonalities. Fancy colors are all the rest for example steel gray, blue, orange, red, green, white, pink, purple or black. Different diamond colors were formed depending on the chemical composition and inclusions in the crystal lattice.

G.I.A.

C.I.B.J.O.

I.D.C./H.R.D.

U.K.

SCAN.D.N. (до 0,5 карат)

SCAN.D.N. (0,5 карат и выше)

D

Blanc cxeptionnel +

Exeptional white +

Finest white

Rarest white

River

E

Blanc cxeptionnel

Exeptional white

F

Extra blanc +

Rare white +

Fine white

Rare white

Top Wesscllon

G

Extra blanc

Rare white

H

Blanc

White

White

White

Wesselton

I

Blanc nuance

Slightly tinted white

Commercial white

Slightly tinted white

Top crystal

J

Top silver Cape

Crystal

K

Blanc legerement teinte

Tinted white

Silver Cape

Tinted White

Top Cape

L

M

Teinte

Tinted

Light Cape

Slightly yellowish

Cape

N

O

Cape

Yellowish

P

Q

R

S-Z

Dark Cape

                                       

 

Diamond clarity

Naturally formed diamonds have inclusions and surface irregularities, which make them unique and help jeweler to recognize them from each other and from false ones. This is a bright side of the clarity. The dark side of the clarity is that it has great impact on value of diamond. As diamonds with lack of inclusions or surface irregularities are rarity, they also set the top prices. 

Table of international standarts

G.I.A.

C.I.B.J.O.

SCAN.D.N.

Flawless

Flawless

Flawless

IF

-

IF

VVS1
VVS2

VVS1
VVS2

VVS1
VVS2

VS1
VS2

VS1
VS2

VS1
VS2

SI1
SI2

SI

SI1
SI2

I1

P1

P1

I2

P2

P2

I3

P3

P3

 

Diamond carat

Weight of diamond is defined as carat, which equals 0,2 grams. Carat has been used as a unit of measurement for centuries. The name has first time attested in the middle ages. It comes from Italian word “carato” meaning carob seed. They used carob seeds for measurement of weight, because they assumed that the seed had low variability in mass. So they could control the price and set criteria for gemstones.

The smallest unit of carat is 0,01 carat, but the largest is 100 carat.

 

There is division of diamonds according it weight and diameter:

Weight 0,03 ct =diameter 2,0 mm

Weight 0,10 ct =diameter 3,0 mm

Weight 0,30 ct =diameter 4,3 mm

Weight 1,00 ct=diameter 6,5 mm

Weight 1,50 ct =diameter 7,5mm

Weight 2,00 ct =diameter 8,2 mm

Weight 3,00 ct =diameter 9,4

 

The overall trend:

Small sized diamonds until 0,29 ct;

Average sized diamonds from 0,30 ct until 0,99 ct;

Big sized diamonds from 1,00 ct and more.

 

 

Elements of a brilliant

         

 

Diamond cut

The diamonds are processed to highlight their natural beauty. The quality of cut is precondition for sparkling and fizzy games of light in gemstone. Diamond cut refers to a style or guide used when shaping a gemstone for polishing.

Most common shape is round brilliant, whose facet proportions and arrangements have been worked out perfectly - with 57 edges. They makes gemstone to sparkle the most, but still You can find a different cut forms, such as oval, marquise, pear, heart, princess and emerald. Choice of shape depends on several factors- shape and size of crystal. 

                                         

 

Certificates of Diamonds

Diamonds can be evaluated in global market in more than one institution. The most important ones worldwide are Gemological Institute of America (GIA), European Gemological laboratory, International Gemological Institute (I.G.I), The Scandinavian diamond nomenclature (SCAN.D.N) or HRD Antwerp located in Netherlands.

All provided gems by our company are certified in Assay Office of Latvia. We assure authenticity of every single jewel we sell.

We provide possibility to obtain extra certification for particular jewel from GIA, if the gemstone is bigger than 0.3 carat.