Frequently Asked Questions
1. Are Yehuda diamonds real
2. How do you enhance the clarity of a diamond?
3. Who invented the Yehuda clarity enhancement process?
4 . Does the diamond contain glass or synthetic material?
5 . Will anybody other than a jeweler be able to tell that my
diamond is clarity enhanced?
6 . Will the enhancement last forever?
7 . Why don't I see Yehuda diamonds in every jewelry store?
8 . What does "Yehuda" mean anyway?
9 . Can every diamond be clarity enhanced?
10 . Are any other natural gemstones enhanced?
11 . What happens if the diamond comes into contact with boiling
acids or open flames?
12 . Why do Yehuda diamonds cost less than other diamonds which
are identical in appearance?
13 . How can you tell if a diamond has been clarity enhanced?
14 . Is the value of a Yehuda Diamond going to decrease over time?
15 . Are Yehuda Diamonds certified?
16 . What Is Laser Inscription?
17 . What Is Laser Drilling?
18 . Do you laser drill every diamond in order to enhance it?
19 . What is your return/refund policy?
20 . Can I have my own diamond clarity enhanced by Yehuda?
Q: Are Yehuda diamonds real
A: Yes, Yehuda diamonds are natural diamonds. They're dug from the same mines
as any other diamonds. We simply take the stones with small, visible imperfections
and make those imperfections invisible.
Q: How do you enhance the clarity
of a diamond?
A: When light travels from one medium to another, its course is altered and it is "reflected" different directions. Consequently, when light attempts to pass through a diamond with a certain type of visible irregularity called a "feather," the light will hit the feather and reflect away in a number of directions. This is why we can see the feather and the diamond is judged as "less valuable." To reverse this visible imperfection, Mr. Yehuda places a molecular amount of a substance INSIDE the feather whose optical properties are identical to those of a diamond. Having been so treated, the light passes through the diamond's natural "feather" imperfection as though it wasn't there.
The amount of material used to fill the feather is so microscopic that even the world's greatest diamond laboratory, the Gemological Institute of America (GIA) has reported that Mr. Yehuda's clarity enhancement process adds ZERO WEIGHT to a diamond.
Q: Who invented the Yehuda
clarity enhancement process?
A: Zvi Yehuda invented the Yehuda clarity enhancement process in 1982. It is
considered by many to be the biggest technological breakthrough in the history
of the diamond industry.
Q: Does the diamond contain glass
or synthetic material?
A: No. The Gemological Institute of America has declared that the Yehuda process
does not involve any additional weight being added to the diamond. The weight
of the stone is the same both before and after the Yehuda treatment.
To protect the process, only Zvi Yehuda, the inventor of the
Yehuda process, and his sons Ron and Dror, know the details of the enhancement.
Q: Will anybody other than a jeweler
be able to tell that my diamond is clarity enhanced?
A: No. Clarity enhancement is not visible to the naked eye. Only a trained jeweler
with the aid of 10x magnification can detect the enhancement. Furthermore, the
GIA found no change in the weight of the diamond from before and after the enhancement.
The material used for the enhancement is on the molecular level and cannot be
Q: Will the enhancement last forever?
A: Yes. The GIA determined the enhancement to be completely stable under normal
wear and tear. The only two things that could damage the enhancement would be
holding the diamond over an open flame or submerging it in strong acids and
basis. Nevertheless, our lifetime guarantee assures you that the enhancement
would be restored at no charge. For the record, we've monitored test diamonds
since the invention of the process in 1982, and no change whatsoever has ever
Q: Why don't I see Yehuda
diamonds in every jewelry store?
A: The Yehuda family is extremely particular with whom it partners. We want
to be completely sure that our jewelers are both honest and reputable. We typically
choose one in each of our markets and that store becomes the authorized Yehuda
Jeweler for the region.
Q: What does "Yehuda" mean
A: Yehuda (YE HOO DA) is the family name of the Israeli diamond scientist who
invented the clarity enhancement process for diamonds. Mr. Yehuda's reputation
in the world of diamond science can be compared to that of Bill Gates in the
computer software industry.
Q: Can every diamond be clarity enhanced?
A: Not every diamond can be clarity enhanced because only specific flaws can
be fixed. Actually only one out of every 500 diamonds is a candidate for clarity
Q: Are any other natural gemstones enhanced?
A: Yes, virtually every gemstone on every jewelry store has been enhanced
in some fashion. Emeralds are oiled, Topaz is radiated, Sapphires are heated,
Pearls are bleached, etc.
For more information on gemstone treatments please visit the AGTA web site.
Q: What happens if the diamond comes into contact with
boiling acids or open flames?
A: Boiling acids or open flames may reverse the enhancement process. In the
extremely unlikely event your diamond should ever require re-enhancement, Yehuda
Diamond Co. will be glad to re-enhance your diamond at no charge and with no
questions asked. Every Yehuda diamond comes with a lifetime warranty card. The
Yehuda clarity enhancement is the only process proved by the GIA to be stable
under normal wear and tear.
Q: Why do Yehuda diamonds cost less than other diamonds
which are identical in appearance?
A: First, if you're shopping with a particular budget in mind,
compare a non-enhanced diamond to a Yehuda Diamond at the same price. What you'll
learn is that the Yehuda Diamond - with the same look - will be about 30% larger
than the non-enhanced stone.
Second, let's assume you want a 1-carat diamond.
Choose a 1-carat Yehuda over a similar-looking non-enhanced 1 carat diamond
and pay at least 30% less.
Q: How can you tell if a diamond has been clarity enhanced?
A: A trained jeweler can tell if a diamond has been clarity enhanced by studying
the diamond under magnification. It is hard to detect the enhancement without
Q: Is the value of a Yehuda Diamond going to decrease
A: A Yehuda diamond is like any other diamond from the market price point of
view. The price of all diamonds is determined by offer and demand.
Q: Are Yehuda Diamond certified?
A: Yes. All Yehuda loose diamonds are certified by either the European Gemological Laboratory (EGL) or the Global Gemological Laboratory (GGL). When you search for a loose diamond on our site, you will have the opportunity to view the certificate that accompanies that stone.
Q: What Is Laser Inscription?
A: Laser inscription is the process that inscribes the girdle of the diamond (the middle area of the stone) and it is done with a microscopic laser beam. Anything can be inscribed on the girdle, from an identification number to a name or phrase. A trained jeweler, with the aid of the loupe (magnifying glass) will be able to read the inscription. Usually, brand name diamonds will carry their name or logo on the girdle. Most certified diamonds would be inscribed with their certificate number.
However, an inscription can be erased on a cutting wheel.
Q: What Is Laser Drilling?
A: The laser drilling process was invented by Zvi YEHUDA in 1965. Some diamonds contain natural black inclusions that are visible to the naked eye. In the laser drilling process a microscopic laser beam is used to drill into the diamond in order to reach the black inclusion. The diamond is boiled in strong acids that clean out the inclusion. After the procedure the black inclusion becomes clear, thus, less noticeable to the naked eye. The process is irreversible and completely stable. The laser drilled diamond should be cared for in the same manner as a non laser drilled diamond. By law, the fact that a diamond has been laser drilled has to be disclosed at every level of sale.
Q: Do you drill every diamond in order to enhance it?
A: No, Most stones have feathers that reach the surface of the diamond and can
be enhanced without laser drilling. Laser drilling is not usually a step in our process. Approximately 85-90% of
Yehuda Diamonds are not drilled at all.
Q: What is your return/refund policy?
A: If you are not completely satisfied with your purchase, you may return any diamond or piece of jewelry you purchase through Yehuda within 30 days for a full refund.
Q: Can I have my own diamond clarity enhanced by Yehuda?
A: Yes, however please bear in mind that on average only 1 out of every 500 diamonds is suitable for the enhancement process. The way to send your diamond to Yehuda is via a local Yehuda retailer in your area. The charge for enhancement will be $300 Dollars per carat plus shipping and insurance. The retailer will be the one to send your diamond to Yehuda and get it back. You will also need to sign a release form to make the process as fast as possible. The usual turn around time is 2 weeks but may be more on occasion.
The enhancement process involves high pressure and high temperature and the diamond may be damaged during the process. The Yehuda Diamond Company is not responsible for any damage to the diamonds. You will have to sign a release form that states the fact that the diamond may be damaged and that we are not responsible for the damages. Please do not raise your hopes about the success of the enhancement as the chances that your diamond is suitable for the enhancement process are very slim.