A Definitive Guide to the Asscher Diamond
By Lead Gemologist Erica Hirsch, GIA GG
The Asscher diamond is a very close relative to the emerald but has a bit more savoir-faire. Its sophistication is welcome in even the most playful settings. With their distinct “windmill” appearance, “Hall of Mirrors” flash effect, and varieties in ratio, the Asscher diamond can express many different statements.
Be aware, Asscher diamonds can be somewhat fussy. Round, oval, pears and other
How do you find the Asscher diamond that’s right for you? We have assembled our best intel here. Using our education and experience, we hope to assist you on your journey to find the diamond you will adore.
The 4 C’s for Asscher Diamonds
Color in Asschers
Asscher diamonds, like most fancy shapes, show their color. Compare an Asscher shape to a round, both H color, the round will appear more colorless.
Quick tip — if considering a setting with multiple stones, make sure they are “color matched.”.
Read up on the science behind fluorescence if you are so inclined. In person, you will find it undetectable to the naked eye. Fluorescence does not affect a stone’s integrity. Diamonds with fluorescence typically cost 10% to 20% less. In addition to cost savings, fluorescence can improve the appearance of a diamond’s color by up to two shades in color grades H through K. We suggest allowing up to medium fluorescence in grades E-G, and up to very strong fluorescence in color grades H-K.
Diamonds are graded for color with their top side facing down. Because of this, you may come across the term “face up.” This is used to explain that a stone’s color may appear different than it was graded.
Example: An I grade Asscher diamond can appear as light as H face up, and even closer to G if it has strong fluorescence. In the J, K, and onward grades the recipe is less dependable.
Clarity in Asscher Diamonds
Asscher diamonds are not great at hiding inclusions, so we recommend a VS clarity or better. Within the diamond trade, there is a saying that a stone may be “eye clean” to which most gemologists would inquire, “who’s eyes?”. The industry defines “eye clean” as “inclusions that cannot be seen with normal vision from a distance of 6-12 inches”.
Diamonds are reflective by nature, that’s why they sparkle. This also means that a single inclusion can appear in multiple areas, like a hall of mirrors. Not great news — we know — but try your best to determine the likelihood of this possibility using the certificate and your eyes.
Clarity grades are based on the size, location
Avoid any diamonds with the following: cavity, knot, chip, laser drill hole, etch channel, indented natural and certain feathers.
Need help understanding what you’re looking at? See our inclusion guide.
These inclusions could impact the integrity of the diamond leaving it vulnerable. Diamonds are hard, not tough. You wouldn’t think twice about cutting something with a sharp knife on a ceramic plate but think how careful you are when placing it in the sink.
Occasionally we are able to hide an inclusion under a prong. It would be our secret.
Bottom line, it may take some hunting but it’s what we love doing every day.
Cut, Symmetry, and Polish in Asscher Diamonds
The GIA and most other diamond grading laboratories do not grade the cut of fancy shapes. If you see cut grades online, it is likely they were estimated by the seller.
Unlike round diamonds, Asscher diamonds do not sparkle… but rather flash! Almost like a wink. Think of the flash seen when taking a picture. We suggest you select your Asscher with a grade of Very Good or better in both Symmetry and Polish. This is not an area we recommend you try to economize. Our gemologist is happy to assist because on rare occasions you can find a winner with Good grades.
If you get frustrated, there is an alternative. A Radiant Cut (shape) has the outline of an Asscher diamond, within the lower ratios offered, with a faceted underbelly. This translate to more freedom with inclusions, symmetry and polish grades. All other rules apply.
Carat Weight and
it’s Relation to Cut
No one should pay for carat weight they cannot see. Understanding the relationship between carat and cut is essential. Girdle and total depth (pavilion) areas are prone to unnecessary bulk. Since diamonds are sold by weight the practice of leaving extra behind to increase cost without any benefit to performance has been one of the industry’s best-kept secrets. Our reference guide will help you avoid this.
There are several
Typically, the condition of the original rough diamond will determine the number of facets cut. You are the ultimate judge on the diamond’s overall appearance, so don’t be vexed by this.
Asscher Diamond Proportion Recommendations
Quick Tip — Total Depth can be frustrating, Be patient.
Accept: Thin – Thick
Avoid: Very Thin & Extremely Thick
Why: Very thin girdles can chip or crack. Very thick means you are paying for weight you can’t see.
Accept: 53 – 69
Avoid: < 53 or > 69
Why: Light should bounce off the table like sun off of a window.
Accept: 59 – 63, 65 Max
Avoid: < 59 or > 65
Why: The less “junk in the trunk” the more weight where it can be seen!
It’s a lot to keep in mind, we know. When you’re ready, we’re here to help. We do the digging for you — it’s our humble contribution to your special story — and it’s our pleasure to lend a hand.
Ready to get started? See that window in the bottom right? Send us a note and while you’re waiting, check out these oval cut styles from our collection. No pressure, diamonds have enough of that.
Not sure? Sure. Consider an Emerald, the Asscher diamond’s slim, elongated cousin.