Diamond abbreviations are also explained such as the usual diamond shape abbreviations jewelers used.

General Diamond Terms

1. 4C’s – Cut, Color, Clarity, and Carat are the four Cs of diamonds.
2. AGS GRADING SCALE – Evaluations are graded on a scale of 0 to 10, with 0 being the ideal or “zero deductions.” Color and clarity are also evaluated on a numerical scale in addition to cut quality, but the GIA equivalents are also given in the report.
3. BLEMISH – is an imperfection on the surface of a diamond that may or may not be visible.
4. BRILLIANCE – The effect generated by light returns when brightness and positive contrast are combined.
5. BRILLIANT – A cutting technique with vertical triangle or kite-shaped facets radiating from a central point. This facet type, which gives in a considerably different ‘flavor’ than step cuts with strong horizontal facets, is exemplified by the round brilliant and princess cut.
6. CARAT – A unit of weight. Diamond size is commonly linked to a carat weight, however, depending on cut proportions, diamonds can have the same weight but drastically different dimensions.
7. CERTIFICATE – A gemological laboratory report.
8. CERTIFIED GEMOLOGIST (AGS) – A student who has completed both the GIA graduate gemology program and the AGS diamond program and is employed by an AGS member store is given this credential.
9. CLARITY – The amount of internal inclusions and outward imperfections in a diamond. Laboratory clarity grading is performed by professional graders at a magnification of 10X.
10. CLOUD – is a little inclusion in a diamond.
11. COLOR – The color of one’s skin. Diamonds in the typical range are graded D-Z based on how much yellow or brown body color they have. The diamond is color graded in a laboratory by comparing it to known master sets of diamonds.
12. CUBIC ZIRCONIA (CZ) – is the most widely used lab-grown imitation diamond (simulant) nowadays.
13. CUSHION – A cushion is a square or rectangular object with rounded corners. Cushion-cut diamonds are sometimes known as antique cushion diamonds.
14. CUT – Aspects of the final diamond’s proportioning and polishing. Cut quality has a greater influence on light performance and attractiveness than any other factor. The term ‘cut’ can also refer to the form of something, such as an emerald cut.
15. DISPERSION – The prismatic separation of white light into its distinct color components. Fire is the name given to the colorful sparks created by the crown.
16. EYE-CLEAN – A diamond with no apparent flaws or blemishes when seen with the naked eye.
17. FACET – A completed gem’s flat polished surface.
18. FIRE – is colored light that is reflected from the inside and radiates forth.
19. FLUORESCENCE – An luminous bluish hue that glows from the diamond surface when exposed to UV light, which typically has little effect on appearance or quality.
20. GIA (Gemological Institute of America) – The world’s most well-known and recognized gemological laboratory, GIA developed the color and clarity grading systems used by the international diamond industry.
21. HOLLOWAY CUT ADVISOR (HCA) – is a simple online application that uses a few basic parameters to offer some indicators of future performance.
22. IDEAL CUT – An ideal cut diamond is a properly proportioned round diamond.
23. IRRADIATION – A treatment procedure that involves blasting a diamond with radiation to change its hue.
24. KEYS TO SYMBOLS – Identifies the stone plot’s features in order of their influence on the clarity grade.
25. LASER DRILLING – Laser drilling is a technique for improving apparent clarity by creating a small hole in a diamond to vaporize an inclusion or allow acid to dissolve it.
26. MARQUISE – Faceting in the dazzling style that is elongated and has points on both ends.
27. MOISSANITE – is a contemporary diamond simulant with good hardness and dispersion. It can deceive thermal conductivity sensors that are commonly used to detect CZ and other stimulants. It is, nevertheless, doubly refractive, making it visible to the trained eye.
28. OLD MINE CUT – A squarish shape, tiny table, and big culet distinguish this early diamond cut.
29. OVAL – An elongated brilliant style cut with rounded edges.
30. PAVÉ – A jewelry method in which tiny diamonds are placed very close together to produce a solid field of diamonds, similar to a stone-paved road. A jeweler working under a microscope is usually responsible for micro pavé.
31. PEAR – Also known as a teardrop, this form has a point on one end and a rounded shape on the other and is carved brilliantly.
32. PRINCESS – Pavilion is a square to slightly rectangular form with dazzling elegance.
33. RADIANT – An octagonal shape formed by a square or rectangle cut with clipped corners.
34. RHINESTONE – An early imitation diamond made by painting a reflecting paint on the reverse of cut glass. It has long been popular in costume jewelry, and is frequently referred to by the old fashion word “paste.”
35. ROUND BRILLIANT – The traditional round cut diamond form with large triangular facets on the pavilion.
36. SINGLE CUT – A circular form with fewer facets — nine on the crown, including the table, and eight on the pavilion, with or without a culet facet. In antique jewelry, this is a common design for accent stones.
37. SPARKLE – is the amount of reflected light that radiates from the surface of a diamond and combines both fire and brightness.
38. SYNTHETIC DIAMOND — Synthetic diamond is a lab-grown product with the same physical and optical characteristics as real diamond.
39. TABLE CUT – An early diamond cut that included grinding off one point of an octahedral diamond crystal to create a big flat facet on top (table) while leaving the rest of the natural crystal faces intact.
40. TRILLIANT – triangle facet arrangement in dazzling design.
41. TRIPLE ZERO – The AGS Ideal cut grade is referred to as triple zero. It was originally a reference to an AGS 0-10 scale D Flawless Ideal cut. It became shorthand for an Ideal Cut with proportions of 0, polish of 0, and symmetry of 0. Despite the addition of the fourth criteria for Ideal – light performance – the certificate is still known as Triple Zero.
42. VIRTUAL FACET – Because a single facet may reflect light from numerous sources, a diamond creates more individual sparkles than there are real facets. Virtual facets are the names given to these distinct light occurrences.
43. WEIGHT RATIO – A calculation of a diamond’s total weight in proportion to its diameter is called a weight ratio.

We hope you find this list of diamond terminology helpful, but if you don’t find what you’re searching for, please don’t hesitate to contact us at Shira Diamonds.

More from Shira Diamonds

How Much is 1 Carat Loose Diamond?
Why Is the Resale Value of a Diamond So Low?

The round diamond is the most popular diamond shape, representing approximately 75% of all diamonds sold. Due to the mechanics of its shape, the round diamond is generally superior to fancy diamond shapes at the proper reflection of light, maximizing potential brightness.

Virtually all round diamonds are brilliant-cut, meaning they have 58 facets (57 when there is no culet).

Round diamonds cost more on a per carat basis than fancy shapes for two reasons; the demand for round diamonds is very high, and the yield is relatively low. Because more of the rough stone is lost in the cutting of a round diamond, the cost of each carat retained is higher. A typical round diamond (for example; a 1.00 carat, F-color, VS2-clarity, Ex cut) may cost 25-35% more than a similar fancy shape.

The round diamond began to rise in popularity in 1919 with the publication of Marcel Tolkowsky’s thesis “Diamond Design: A Study of the Reflection and Refraction of Light in Diamond”. Tolkowsky’s work described the ideal proportions of a round cut diamond for maximizing light return (or brilliance) and dispersion (or fire). The original Tolkowsky specifications (53% table, 59.3% depth, 34.50 crown angle, visible culet) have since been modified as the cut mechanics for round diamonds have perfected over time. These theoretical advancements, as well as advancements in technology (such as the use of lasers in diamond cutting), have been adopted by diamond manufacturers to produce the incredibly brilliant cuts we see today in well cut
round diamonds.

The table below serves as a general guideline for evaluating the cut of a round diamond. GIA takes these and other factors into consideration when assigning a cut grade.

ROUND DIAMOND – CUT GUIDE

Are you looking for the best round diamonds prices in Dallas, Texas? Shira Diamonds in Dallas, Texas cuts and manufactures diamonds in India! We supply diamond wholesalers in Israel, Belgium, China, Hong Kong, and the United States with loose diamonds.

Here is a list of what we just received today at Shira Diamonds headquarters in Dallas, Texas.

Round Diamond 1.02ct E SI2 $3000.00

Round Diamond 1.00ct D S11 $3400.00

Round Diamond 1.00ct E SI1 $3700.00

Round Diamond 1.08ct F SI1 $3900.00

Round Diamond 1.10ct D SI2 $3795.00

Round Diamond 2.03ct D Si1 $14810.00

Round Diamond 2.06ct E SI1 $13441.00

Round Diamond 1.06ct E Si1 $3430.00

Round Diamond 1.42ct F Si2 $4300.00

Round Diamond 1.34ct D SI2 $4000.00

Over 10 Million in loose diamonds in Dallas, Texas. We supply wholesalers, retailers, and diamond brokers in Dallas, Texas. Guaranteed to have the largest round diamond inventory in Texas.

A brilliant is a diamond or other gemstone, cut in a particular form with numerous facets so as to have exceptional brilliance. The shape resembles that of a cone and provides maximized light return through the top of the diamond.

Even with modern techniques, the cutting and polishing of a diamond crystal always result in a dramatic loss of weight; rarely is it less than 50%. The round brilliant cut is preferred when the crystal is an octahedron, as often two stones may be cut from one such crystal. Oddly shaped crystals such as macles are more likely to be cut in a fancy cut—that is, a cut other than the round brilliant—which the particular crystal shape lends itself to.

Facet proportions and names

The original round brilliant-cut was developed by Marcel Tolkowsky in 1919. The modern round brilliant consists of 58 facets (or 57 if the culet is excluded), ordinarily today cut in two pyramids placed base to base: 33 on the crown (the top half above the middle or girdle of the stone), truncated comparatively near its base by the table, and 25 on the pavilion (the lower half below the girdle), which has only the apex cut off to form the culet, around which 8 extra facets are sometimes added. In recent decades, most girdles are faceted. Many girdles have 32, 64, 80, or 96 facets; these facets are not counted in the total. While the facet count is standard, the actual proportions (crown height and angle, pavilion depth, etc.) are not universally agreed upon. One may speak of the American cut or the Scandinavian standard (Scan. D.N.), to give but two examples.

Today, Tolkowsky’s “ideal” model has been overused. The original model was a general guideline, as there were several aspects of diamond-cutting that were not explored or accounted for in that model.

Because every facet has the potential to change a light ray’s plane of travel, every facet must be considered in any complete calculation of light paths. Just as a two-dimensional slice of a diamond provides incomplete information about the three-dimensional nature of light behavior inside a diamond, this two-dimensional slice also provides incomplete information about light behavior outside the diamond. A diamond’s panorama is three-dimensional. Although diamonds are highly symmetrical, light can enter a diamond from many directions and many angles. This factor further highlights the need to reevaluate Tolkowsky’s results, and to recalculate the effects of a diamond’s proportions on its appearance aspects.Another important point to consider is that Tolkowsky did not follow the path of a ray that was reflected more than twice in the diamond. However, we now know that a diamond’s appearance is composed of many light paths that reflect considerably more than two times within that diamond. Once again, we can see that Tolkowsky’s predictions are helpful in explaining optimal diamond performance, but they are incomplete by today’s technological standards.

Figures 1 and 2 show the facets of a round brilliant diamond.

Figure 1 assumes that the “thick part of the girdle” is the same thickness at all 16 “thick parts”. It does not consider the effects of indexed upper girdle facets.

Figure 2 is adapted from Figure 37 of Marcel Tolkowsky’s Diamond Design, which was originally published in 1919. Since 1919, the lower girdle facets have become longer. As a result, the pavilion main facets have become narrower.

Cut grading

The relationship between the crown angle and the pavilion angle has the greatest effect on the look of the diamond. A slightly steep pavilion angle can be complemented by a shallower crown angle, and vice versa.

Other proportions also affect the look of the diamond:

• The table ratio is highly significant.
• The length of the lower girdle facets affects whether can be seen in the stone, under certain viewers.
  • Most round brilliant diamonds have roughly the same girdle thickness at all 16 “thick parts”.
  • So-called “cheated” girdles have thicker girdles where the main facets touch the girdle than where adjacent upper girdle facets touch the girdle. These stones weigh more (for a given diameter, average girdle thickness, crown angle, pavilion angle, and table ratio), and have worse optical performance (their upper girdle facets appear dark in some lighting conditions).
  • So-called “painted” girdles have thinner girdles where the main facets touch the girdle than where adjacent upper girdle facets touch the girdle. These stones (such as EightStar-brand diamonds) have less light leakage at the edge of the stone (for a given crown angle, pavilion angle, and table ratio). Some diamonds with painted girdles receive lower grades in the GIA’s cut grading system, for reasons explained in the GIA article

Several groups have developed diamond cut grading standards. They all disagree somewhat on which proportions make the best cut. There are certain proportions that are considered best by two or more groups however.

• The AGA standards may be the strictest. David Atlas (who developed the AGA standards) has suggested that they are overly strict.
• The HCA changed several times between 2001 and 2004. As of 2004, an HCA score below two represented an excellent cut. The HCA distinguishes between brilliant, Tolkowsky, and fiery cuts.
• The AGS standards changed in 2005 to better match Tolkowsky’s model and Octonus’ ray tracing results. The 2005 AGS standards penalize stones with “cheated” girdles. They grade from 0 to 10.
• The GIA began grading cut on every grading report beginning January 1, 2006 based on their comprehensive study of 20,000 proportions with 70,000 observations of 2,000 diamonds. The single descriptive words are as follows: Excellent, Very Good, Good, Fair, and Poor.

The distance from the viewer’s eye to the diamond is important. The 2005 AGS cut standards are based on a distance of 25 centimeters (about 10 inches). The 2004 HCA cut standards are based on a distance of 40 centimeters (about 16 inches).

Polish and symmetry are two important aspects of the cut. The polish grade describes the smoothness of the diamond’s facets, and the symmetry grade refers to alignment of the facets. With poor polish, the surface of a facet can be dulled, and may create blurred or dulled sparkle. It may constantly look like it needs to be cleaned. With poor symmetry, light can be misdirected as it enters and exits the diamond.

Today we have received over 1.2 Million in loose round diamonds.

Round Diamond 1.00ct EGL USA F Si2 $3200.00

Round Diamond 1.00ct EGL USA E SI3 $2900.00

Round Diamond 1.01ct EGL USA D SI2 $4000.00

Round Diamond 1.03ct EGL USA E SI2 $3300.00

Round Diamond 1.03ct EGL USA D SI2 $3500.00

Round Diamond 1.07ct EGL USA F SI2 $2900.00

It’s not just the festive season that’s almost upon us but the peak proposal season, too. Christmas Eve is the most popular day of the year for men to propose, with New Year’s Eve not far behind.

Experts say those popping the question don’t necessarily need to spend more to get bigger diamonds or more impressive jewellery, they just need to know a few tricks of the trade.

Alastair Smith, a Briton living in Sydney, spent six months researching the market to make sure he got his now-wife’s dream ring at the very best price. He’s written a book about his search.

How To Buy An Engagement Ring explains what kind of retailers men should approach, how to save thousands of pounds on diamonds, and how to get the exact diamond you want.

“Most men like to think they know their partner pretty well, but the reality is that guys often get it wrong when it comes to engagement rings,” says Smith, “The jewellery industry doesn’t offer a centralised place for impartial information, meaning that men end up repeating the same mistakes as millions before them. Buying an engagement ring has changed, and there are thousands to be saved if you know what to look for and where to find it.”

Before you start diamond shopping you need to understand the “4Cs”: cut, colour, clarity and carat. Each diamond is priced individually according to the mix of the 4Cs.

So, now you know what you’re looking for, where should you buy it?

The experts agree that anyone buying an engagement ring should give high street jewellers a miss and go online instead.

As with other online retailers, internet-only jewellers can offer cheaper deals as they avoid the overheads associated with running a shop. Make sure you shop around and only buy from a company with a good reputation and excellent, authentic reviews.

As well as saving up to 80% of the cost of a diamond, shopping online at certain sites allows buyers to match up the exact combination of the 4Cs that they want.

“Online has completely changed the diamond industry, as people now have their pick from hundreds of thousands of diamonds and rings, rather than just the handful that their local jeweller stocks,” says Smith, “Going online gives guys access to the best choice and the best prices.”

Smith eventually bought his fiancé’s ring at ShiraDiamonds.com. Other online retailers he recommends include Zales.com, JamesAllen.com, Ritani.com and RobbinsBrothers.com.

If you’re on a really tight budget you can give diamonds the swerve altogether and opt for an alternative stone such as a sapphire or zircon. Alternatively check with your relatives to see if there are any heirlooms waiting to be passed down. Not only is this option potentially free but jewellery with history can be much more meaningful and significant.

Trust Us, Carat by Carat

Looking for the best
round diamond prices in Anahuac, Texas? Shira Diamonds in Texas can help you save on your next diamond purchase. We are a diamond siteholder supplying retail stores, diamond brokers, and diamond wholesalers with loose certified diamonds.

A Sightholder is a company on the De Beers Global SightholderSales’s (DBGSS) list of authorized bulk purchasers of rough diamonds. DBGSS is controlled by the De Beers Group, the single largest producer and purveyor of rough diamonds in the world. GBGSS was previously known as DTC (Diamond Trading Company).

Wholesale round brilliant cut diamonds in Anahuac, Texas at Shira-Diamonds.com. This brilliant cut diamond is a 1.51ct I VS2 GIA Certified Diamond. A brilliant is a diamond or other gemstone, cut in a particular form with numerous facets so as to have exceptional brilliance. The shape resembles that of a cone and provides maximized light return through the top of the diamond.

Even with modern techniques, the cutting and polishing of a diamond crystal always result in a dramatic loss of weight; rarely is it less than 50%. The round brilliant cut is preferred when the crystal is an octahedron, as often two stones may be cut from one such crystal. Oddly shaped crystals such as macles are more likely to be cut in a fancy cut—that is, a cut other than the round brilliant—which the particular crystal shape lends itself to.

If you are looking for round loose diamonds in Anahuac, Texas please give us a call at 214-707-1182. We have 1000s of diamonds in stock certified with EGL and GIA.

Historically, GIA has described unmodified round brilliant-cut diamonds as either “round brilliant” or “old European.”

The old European cut was an early evolutionary stage in the progression toward the modern round brilliant. In general, trade professionals characterize old European cuts as having small table facets, heavy crowns, and overall “deep” or “steep” proportions.

In 2005, GIA introduced a cut-grading system for unmodified round brilliant cut diamonds. The name “unmodified round brilliant” was applied to a symmetrical round cut with a regular array of 58 facets, cut to modern standards. The system was the culmination of years of research that included the results of preference testing among a wide variety of groups, including trade professionals and consumers.

GIA designed the system to assess the design quality and craftsmanship of diamonds cut in the standard round brilliant style when compared to modern preferences. The system’s grades are based on modern-day conventions and assess the proportions that yield the best combination of brightness, fire, scintillation, and pattern. There are five grades: Excellent, Very Good, Good, Fair, and Poor.