Articles

The weight of the diamond

CARAT WEIGHT 1 Carat= 1/5 gram = 0.2 gram = 100 points 5 Carats = 1 gram only 1/2 Carat = 50 points 1/4 Carat = 25 points The origin of the name Carat comes from the Carob tree which is called “Ceration” in Greek. Each carob seed equals 1 carat. 1/4 Carat = 1 […]

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Color of Diamonds

D, E, F -These are the whitest diamonds, colorless and are often called “collection” diamonds. The difference among them is the transparency and clarity of the color. Other nick names for these diamonds are: River. When you want to note that the diamond is so white, that it looks whiter than D color, it is […]

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Clarity of Diamonds

Only in 1953 the GIA started to grade clarity & color in the grading scales we use today. The clarity grade of a diamond is determined by its clarity inclusions that divide into three: Internal Characteristics (inclusions) These inclusions badly affect the clarity because: It is difficult to repair them – repairing them substantially reduces […]

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The proportions of the round brilliant cut diamond

CUT PROPORTIONS The round brilliant cut appeared in the 17th century. Since then it has gone through a number of changes until it reached its current shape, which was established by Marcel Tolkowsky in 1919. Excellent proportions are very important to a diamond because they allow the greatest amount of light to be reflected from […]

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Finish – Symmetry

Today, the GIA measures all of the symmetry components by an automatic device that measures parts of the symmetry that the human eye cannot notice at all. There are two different types of symmetry:   Structure Symmetry Is the culet in the center of the stone? We can imagine radii from the culet to the […]

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The polish of the diamond

Polish When the polish of the stone is not good it affects the brilliancy, the fire and especially the luster of the stone. There are 3 defects that can affect the polish:   Polish Lines – Fine parallel grooves and ridges left by polishing; can occur on any facet but do not cross facet junctions; […]

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Diamond Substitutes – Cubic Zirconia (ZRO2)

The Cubic Zirconia (ZRO2) is considered to be one of the best substitutes for a diamond because it has more fire than a diamond (although it has less brilliance). 11 differences between a Zirconia and a Diamond:   Specific Gravity The zirconia is heavier than a diamond – its specific gravity is 5.80; a diamond’s […]

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Diamond substitutes – Moissanite

Moissanite is considered to be an artificial stone which closely resembles diamonds, and a difficult diamond substitute to identify. Moissanite was developed by a company called CREE, which also invented special equipment to distinguish between moissanite and diamonds. This equipment is called “Tester Model 590.” Today there are several more devices that differentiate between a […]

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