At Ice River Diamonds we believe that our customers should have a better understanding of how diamonds are graded so that a more informed decision can be made when purchasing a diamond. Then, our goal is to bridge the gap between the informed customer and the selection process. Weather you are searching for a specific diamond, ring mounting or a finished piece of jewelry we want to provide you with the resources that can help you make an educated decision.
Over the years many terms have been used to describe and categorize diamonds. Originally diamonds were described by the mines that they were derived from. Depending on the geographic location certain characteristics were more prevalent and believed to influence the diamonds from those regions, especially, with regard to color grading. Terms such as Wesselton, Premier, and River have originated over the last few centuries.
Today, various companies and institutions have created grades specific to individual diamonds verses terms used to describe generically a particular mine or region. At Ice River Diamonds we believe the degree of accuracy, and consistency varies among some of these companies and institutions. Therefore, you will only find diamonds graded through the Gemological Institute of America on our website. It is our opinion that GIA certifications offer the highest standards in terms of integrity and consistent accuracy in the industry. GIA is the world leader pertaining to diamond grading.
We encourage you to browse through our DIAMOND GRADING, GLOSSARY, and FAQ tabs for more insight. Please feel free to contact us regarding any other questions or concerns. Our highly professional staff is ready to help.
Diamond color is all about what you can't see. Diamonds are valued by how closely they approach colorlessness - the less color, the higher theft value. (The exception to this is fancy-color diamonds, such as pinks and blues, which lie outside this color range.) Most diamonds found in jewelry stores run from colorless to near-colorless, with slight hints of yellow or brown.
GIA's color-grading scale for diamonds is the industry standard. The scale begins with the letter D, representing colorless, and continues with increasing presence of color to the letter Z, or near-colorless. Each letter grade has a clearly defined range of color appearance. Diamonds are color-graded by comparing them to stones of known color under controlled lighting and precise viewing conditions.
Many of these color distinctions are so subtle as to be invisible to the untrained eye. But these slight differences make a very big difference in diamond quality and price.
WHY DOES THE GIA COLOR GRADING SYSTEM START AT D?
Before GIA developed the D-Z Color Grading Scale, a variety of other systems were loosely applied. These included letters of the alphabet (A. B and C, with multiple A's for the best stones), Arabic (o, 1, 2, 3) and Roman (I, II, III) numerals, and descriptions such as "gem blue" or "blue white." The result of all these grading systems was inconsistency and inaccuracy. Because the creators of the GIA Color Scale wanted to start fresh, without any association with earlier systems, they chose to start with the letter D-a letter grade normally not associated with top quality.
Because diamonds formed deep within the earth, under extreme heat and pressure, they often contain unique birthmarks, either internal (inclusions) or external (blemishes).
Diamond clarity refers to the absence of these inclusions and blemishes. Diamonds without these birthmarks are rare, and rarity affects a diamond's value. Using the GIA International Diamond Grading System", diamonds are assigned a clarity grade that ranges from flawless (FL) to diamonds with obvious inclusions (I3).
Every diamond is unique. None is absolutely perfect under 10x magnification, though some come close. Known as Flawless diamonds, these are exceptionally rare. Most jewelers have never even seen one.
The GIA Clarity Scale contains I1 grades, with most diamonds falling into the VS (very slightly included) or SI (slightly included) categories. In determining a clarity grade, the GIA system considers the size, nature, position, color or relief, and quantity of clarity characteristics visible under 10x magnification.
Flawless (FL) - No inclusions or blemishes are visible to a skilled grader using 10x magnification Internally Flawless (IF) - No inclusions and only blemishes are visible to a skilled grader using 10x magnification Very, Very Slightly Included (VVS1 and VVS2) - Inclusions are difficult for a skilled grader to see under 10x magnification Very Slightly Included (VS1 and VS2) - Inclusions are clearly visible under 10x magnification but can be characterized as minor Slightly Included (SI1 and SI2) - Inclusions are noticeable to a skilled grader using 10x magnification Included (I1, I2, and I3) - Inclusions are obvious under 10x magnification and may affect transparency and brilliance.
Cut is the factor that fuels a diamond's fire, sparkle and brilliance.
The traditional 58 facets in a round brilliant diamond, each precisely cut and defined, are as small as two millimeters in diameter. But without this precision, a diamond wouldn't be nearly as beautiful. The allure of a particular diamond depends more on cut than anything else.
Though extremely difficult to analyze or quantify, the cut of any diamond has three attributes: brilliance (the total light reflected from a diamond), fire (the dispersion of light into the colors of the spectrum), and scintillation (the flashes of light, or sparkle, when a diamond is moved).
An understanding of diamond cut begins with the shape of a diamond. The standard round brilliant is the shape used in most diamond jewelry. All others are known as fancy shapes. Traditional fancy shapes include the marquise, pear, oval and emerald cuts. Hearts, cushions, triangles and a variety of others are also gaining popularity in diamond jewelry.
As a value factor, though, cut refers to a diamond's proportions, symmetry and polish. For example, look at a side view of the standard round brilliant. The major components, from top to bottom, are the crown, girdle and pavilion. A round brilliant cut diamond has 57 or 58 facets, the 58th being a tiny flat facet at the bottom of the pavilion that's known as the culet. The large, flat facet on the top is the table. The proportions of a diamond refer to the relationships between table size, crown angle and pavilion depth. A wide range of proportion combinations are possible, and these ultimately affect the stone's interaction with light.
In early 2005, GIA unveiled a diamond cut grading system for standard round brilliants in the D-to-Z color range. This system, the product of more than i years of intensive research and testing, assigns an overall diamond cut grade ranging from Excellent to Poor.
HOW DOES PAVILION DEPTH AFFECT A DIAMOND'S CUT?
The distance from the bottom of the girdle to the culet is the pavilion depth. A pavilion depth that's too shallow or too deep will allow light to escape through the sides or the bottom of the stone. A well-cut diamond will direct more light through the crown.
Diamonds and other gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the same weight as a paperclip. (Don't confuse carat with karat, as in "18K gold," which refers to gold purity.) Just as a dollar is divided into 100 pennies, a carat is divided into 100 points. For example, a 50-point diamond weighs 0.50 carats. But two diamonds of equal weight can have very different values depending on the other members of the Four C's: clarity, color and cut. The majority of diamonds used in fine jewelry weigh one carat or less.
Because even a fraction of a carat can make a considerable difference in cost, precision is crucial. In the diamond industry, weight is often measured to the hundred thousandths of a carat, and rounded to a hundredth of a carat. Diamond weights greater than one carat are expressed in carats and decimals. (For instance, a 1.08 ct. stone would be described as "one point oh eight carats," or "one oh eight.")
HOW DID THE CARAT SYSTEM START?
The carat, the standard unit of weight for diamonds and other gemstones, takes its name from the carob seed. Because these small seeds had a fairly uniform weight, early gem traders used them as counterweights in their balance scales. The modern metric carat, equal to 0.2 grams, was adopted by the United States in 1913 and other countries soon after. Today, a carat weighs exactly the same in every corner of the world.
Reasons to Buy
Because we use excellent well cut, white diamonds in our mountings that will best compliment your center stone.
One of a Kind
Because many of our products are exclusive, "one of a kind".
Because we take pride in all that we do.
I was very pleased with the quality, cost, and customer service I received from Ice River Diamonds. I'm now engaged, and she is beyond happy with the diamond. Friends, family, and even other jewelers have complemented her on how nice the stone/ring looks. I look forward to making my wedding bands within the next year, thanks Mike.