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Education

 
Gold:

Gold is a pure, natural yellow element. Pure gold is used more for investment than decoration, as it tends to be quite vulnerable to scratching and bending. In the jewelry industry, gold is usually mixed or alloyed with other metals in order to harden it and influence the color. In order to obtain various shades of White Gold, the gold is alloyed with silver, nickel or palladium. Rose color alloys mainly contain copper and yellow alloys contain zinc. You can make an alloy harder by adding a tiny percentage of titanium. 

Jewelry is most commonly made up of 18 or 14 karatages. 18 Karat is represented by the symbol 18K or 750 stamped on a piece of jewelry representing that the gold content is 75%. 14 Karat is also stamped into jewelry using 14K or 585 representing it is 58.5% pure gold

The table below provides the various karatages and their equivalent gold content in percentage and fineness terms, as recognized by international standards.

 
Karats Fineness (of 1000) Gold Content As A Precent
24K 999 99.90%
18K 750 75.00%
14K 585 58.50%
10K 417 41.70%
 
Platinum:

Platinum is a pure, naturally white and hypoallergenic element. It is one of the most rare metals being primarily mined in South Africa, Russia and Canada, but it is also mined in smaller quantities in the United States, United Kingdom and Columbia.

The density of platinum makes it more durable than other jewelry metals and jewelry made of platinum is usually 95% pure. This is represented most commonly by the stamp PT950, 950PT, 950PLAT, PLATINUM or PLAT on the piece of jewelry. Platinum is hypoallergenic, which makes it ideal for those with sensitive skin.

 
Palladium:

Palladium is a rare and lustrous silvery-white element which is part of the platinum group of metals or PGM for short. Compared to Platinum, Palladium has a much lower melting point and density. This means that palladium is just as durable, but lighter. 

Palladium jewelry, like platinum, is usually 95% pure, this is represented by the stamp 950Pd or 950PALL in most cases.

 
Diamonds:

Every diamond is unique, reflecting the story of its arduous journey from deep inside the earth to a cherished object of adornment. Yet all diamonds share certain features that allow us to compare and evaluate them. These features are called the 4Cs.

 
Carat Weight:

One carat equals 0.2 grams. For diamonds under a carat, each carat is divided into 100 points, similar to pennies in a dollar. For instance, 0.75ct. = 75 points and 1/2 ct. = 50 points.

Carat Weight
 
Clarity:

The GIA Clarity Scale includes eleven clarity grades ranging from Flawless to I3. Because diamonds form under conditions of tremendous heat and pressure, internal inclusions and external blemishes are common and help gemologists identify individual stones. The Clarity Scale also helps separate natural diamonds from synthetics and simulants.

 
Color:

The GIA Color Scale extends from D (colorless) to Z (light yellow or brown). Although many people think of diamonds as colorless, most diamonds used in jewelry have subtle tints of yellow or brown. Each letter grade represents a range of color and is a measure of the degree of color within the diamond, all measured by comparing the diamond to a set of master stones.

Color
 
Cut:

A polished diamond's proportions affect the performance and interplay of light which, in turn, affects its beauty and desirability. Brightness is the combination of all white light reflecting from both the surface and interior of a diamond. Fire describes the colored flashes that can be seen in a diamond. And scintillation is the sparkle of light you see and the overall pattern of bright and dark areas when you look at a diamond face-up. The design and craftsmanship of a diamond also affect its cut quality, and these factors are considered in determining a diamond's GIA Excellent-to-Poor Cut Grade. 

Many diamonds emit a visible light, called fluorescence, when exposed to ultraviolet radiation.

Color
Learn more about diamonds and GIA Diamond Grading Reports
 
 
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