About John Atencio Diamonds

The Origin of Our Diamonds

At John Atencio, our mission is to provide exceptional diamonds that meet the highest ethical, social, and environmental standards within the industry. We take pride in conducting business with the utmost integrity and social awareness.

Because of this commitment, we must address the issue of conflict diamonds. It is vitally important that our rough diamonds are responsibly sourced and adhere to the most stringent guidelines possible. We maintain that our John Atencio diamonds are free from any taint of war, human suffering or any type of exploitation. We make certain that our long-term suppliers are transparent and guarantee that their diamonds adhere to the Kimberley Process Certification Scheme (https://www.kimberleyprocess.com), created by governments of nations involved in the diamond trade. John Atencio fully supports the industry’s self-regulation program.

We know that each John Atencio diamond ring is a powerful symbol. We ensure our customer that our diamonds are responsibly mined and our craftsmanship, design and quality are always of the finest standards.

What is the Kimberly Process?

In May 2000, representatives of diamond-producing countries met in Kimberley, South Africa to put an end to the illegal trade in diamonds. The United Nations adopted a resolution that created an internal certification system for rough diamonds. In November 2002, 52 governments established the Kimberley Process. Since then, 55 governments, in cooperation with the diamond industry, committed themselves to compliance with the rules established. All rough diamonds must be transported in sealed containers and identified by means of a numbered, forgery-proof and authenticated certificate of origin. Similar rules apply to cut diamonds to ensure that they, too, are conflict free. With the introduction of the Kimberley process, 99% of all diamonds are now conflict-free.

How to Choose the Perfect John Atencio Diamond

The 4 C's



Cut refers to a diamond’s shape, proportion, symmetry and finish. A diamond’s cut unleashes its light. Within the 4’C’s, Cut influences a diamond’s brilliance, radiance and beauty most. A well-cut diamond will appear brilliant and fiery while a poorly cut diamond may appear dark and lifeless, regardless of the other attributes. A round diamond is the most brilliant shape and when cut to ideal proportions and angles will refract light internally and will release the brilliance and light through the table and crown.  Cut grade also takes into account the design and craftsmanship of the diamond, including its weight relative to its diameter, its girdle thickness (which affects its durability), the symmetry of its facet arrangement, and the quality of polish on those facets.

The Cut Scale for standard round brilliant diamonds in the D-to-Z diamond color range contains 5 grades ranging from Excellent to Poor.


Diamond Clarity refers to the absence of inclusions and blemishes.

While diamonds are beautiful, no two diamonds are identical. Small crystals can become trapped in a diamond when it’s forming. Sometimes as a crystal grows, it can develop irregularities in its atomic structure. These ‘inclusions’ appear as crystals, feathers and lines.

Clarity Scale

FLAWLESS (FL): No inclusions and no blemishes visible under 10x magnification.

INTERNALLY FLAWLESS (IF): No inclusions visible under 10X magnification

VERY, VERY SLIGHTLY INCLUDED (VVS1/VVS2): Inclusions so slight that they are difficult for a skilled grader to see under 10X magnification.

VERY SLIGHTLY INCLUDED (VSI/VS2): Inclusions are observed with effort under 10x magnification but can be characterized as minor.

SLIGHTLY INCLUDED (SI1/SI2): Inclusions are noticeable under 10X magnification.


The color rating of a diamond is based on the absence of color. A chemically pure and structurally perfect diamond has no hue, and consequently a higher value. The D-Z diamond color rating below from GIA measures the degree of “colorlessness” of a stone under controlled lighting conditions. To the untrained eye, most gem-quality diamonds appear colorless. There are slight differences in shade – the result of trace elements combining with carbon over millions of years.

Carat Weight

Diamond carat weight is the measurement of how much a diamond weighs. A metric “carat” is defined as 200 milligrams. When weighing a diamond, each carat can be subdivided into 100 points. This allows for a very precise measurement. For example, a diamond that weighs 0.25 carats is referred to as 25 points or a quarter carat. Two diamonds of equal size can have completely different values depending upon the other characteristics (the 4 C’s). As a diamond increases in size, it’s rarity increases.

Diamond Shapes


The Round Diamond, or Brilliant Cut Diamond, is by far the most popular shape for diamond engagement rings. Carefully refined over nearly 100 years to maximize light return and sparkle, this shape has proven the test of time as a sought after choice. It is cone-shaped to maximize light return through the top of the diamond. It is cut to have 58 facets: 33 on the crown and 25 on the pavilion. The relationship between the angle of the crown (above the girdle) and the pavilion (below the girdle) is complementary.


The princess has pointed corners and is traditionally square in shape. Princess cut diamonds possess the gorgeous sparkle of round brilliant diamonds in a distinctive square shape.


The oval shape is symmetrical and exhibits a similar brilliance to round shaped diamonds. A twist on the classic round brilliant, the elongated shape can create the illusion of larger size.


The Radiant Cut Diamond combines the more stylish square or rectangular shape with the brilliance of the more traditional Round Cut. It combines two diamond cutting styles-the Round Cut style and the Emerald Cut style, to create a non-traditional diamond.


What makes this shape different is its pavilion, which is cut with rectangular facets to create a unique optical appearance. Due to its larger, open table, this shape highlights the clarity of a diamond. While it lacks the brilliance of diamonds cut with triangular and kite-shaped facets, it more than makes up for it in its extreme clarity.


The Heart shaped diamond has a cleft at the top and exhibits superior brilliance – It is considered one of the most romatic diamond shapes. The key to the heart shape is symmetry – the two lobes of the diamond should be identical -  in shape, size and cut. Heart shaped diamonds typically appear smaller than their carat weight.


Pear shaped diamonds feature a rounded edge tapering to a point at the opposite end. The Pear diamond usually contains 58 facets, which allows for light to pass through it in much the same way as in a round brilliant diamond.


The Marquise shaped diamond features pointed ends with a curved middle for an eye-catching look. With a larger surface area than any other diamond shape, the Marquise shape maximizes the perceived size. The Marquise Diamond uses a cutting process similar to that of a Round Brilliant Diamond, but the diamond cutter maximizes the carat weight by elongating it into its distinctive ''boat-shape''. This way, they can eliminate all inclusions while maintaining as much of the unblemished stone as possible.