About Best Brilliance

Why is buying diamonds from you the best choice?

We obtain natural diamonds from the best sources available. Using state of the art cutting instruments utilized by experts, we meticulously cut and polish our diamonds to meet the demand of discerning customers just like you. For an extra layer of confidence, your loose diamond or diamond jewelry purchased from Best Brilliance is accompanied by a diamond certificate.

Just what can I purchase from you?

You can buy any loose diamond featured on this site, and you can also get your diamond ring sized and set at no additional charge.

How often do you add new inventory to your website?

We constantly add new diamonds. Our inventory changes daily due to the high volume of sales we have.

We constantly add new diamonds. Our inventory changes daily due to the high volume of sales we have.

Purchasing Diamonds

Can I buy a diamond that I found on your eBay store?

Diamonds on our eBay store can be purchased immediately.

How do I know I am getting exactly what I am ordering?

We guarantee that you are getting exactly the diamond or the jewelry item you ordered through us. We have over 40 years of experience with global locations in Belgium, New York, Los Angeles and Tel Aviv. We are experts in the area of clarity enhanced diamonds. We have stayed in business by providing high-quality diamonds to dealers and retailers around the world. Today, buying through us online is purchasing straight from the source, without the middleman; so you receive the best price possible. All of our diamonds are certified from a licensed agent. Furthermore, our team approves every gem before it is shipped off to you.

How do I pay for my new diamonds?

We make purchasing your diamond easy for you. You can pay via credit card or bank transfer. If you choose to pay with a bank wire, you’ll receive a 1.5% discount on your order.

Do you offer a guarantee?

Yes, we want you to be happy with your purchase. If you are not 100% satisfied you can return your diamond within thirty days of purchase.

What if I want to upgrade my diamond purchase?

You can receive a 100% credit on your diamond purchase when you upgrade. Just return your diamond to us within thirty days of purchase. The returned diamond must be in original new condition and be accompanied by all the original documents. Please call first to receive your RAN (Return Authorization Number) prior to shipping back your diamond.

Gemological Terms & Laboratory Info

What is a gemologist?

A gemologist is an individual who graduated from studies in identification and grading of diamonds and gemstones at a recognized gemological institute. Most graduate gemologists in the United States have studied at the Gemological Institute of America (GIA). They earn the prestigious Graduate Gemologist Diploma.

Do you have gemologists on staff to help me with my purchase?

Yes, you can speak with one of our certified gemologists in our New York or Los Angeles offices at any time. They are an important part of our customer service team.

How do I know I will receive what I ordered?

We send a professionally prepared and independently created laboratory report from International Gemological Appraisers (IGA) with each shipped diamond. This diamond certificate can be reviewed by any gemologist and analyzed for the unique characteristics of your individual diamond.

What are the IGA certificates?

Each uniquely created certificate details the peculiar characteristic of your diamond after it has been carefully examined. These certificates contain a universally understood method of communication of diamond qualities and adhere to the highest standards of diamond grading. An IGA diamond certificate is included with your loose diamond or diamond jewelry purchase.

Just what are the 4Cs of diamonds?

The 4Cs are the universally accepted grading standard created by Gemological Institute of America (GIA). Every diamond is graded by Cut, Carat, Color and Clarity.

I’ve heard the term, Eye Clean referring to a diamond. Just what is that?

This is a diamond trade specific term indicating the diamond is clean or free from noticeable inclusions to the unaided eye; face up, from a distance of twelve to fifteen inches. VS2 or higher quality diamonds are usually eye-clean. SI1, SI2, and I1 diamonds must be carefully inspected to locate visible inclusions from the top of the stone.

What does the term “Cut” mean?

Some people think the cut is the shape, like round or oval. But it actually refers to how well cut the stone is. Well cut diamonds appear fiery and brilliant. Poorly cut stones are dull and unappealing. A well-cut diamond can actually make the stone appear larger than poorly cut diamonds of the same carat weight. So you can see how important the cut grade is.

Shipping, Terms & Customer Care

Is my jewelry purchase subject to sales tax?

If we ship your order to a New York address, please add sales tax. New York state sales tax of 4% or New York City sales tax of 4.5% applies.

How do I receive my order from you?

We ship FedEx fully insured delivery. It usually takes 7-14 days.

What about customs fees?

When your package arrives, FedEx will contact you and arrange to collect all taxes and duties.

How do I get help with my order?

It’s our pleasure to offer you the highest quality customer care as well as the finest diamonds. Just call our customer service at 866-978-4466 or email sales@zooskoole.com. You can place your order here, or ask us any questions about your previously placed order. We’ll be happy to help.

Is it safe to ship diamonds?

All shipments are fully insured and all deliveries require a signature.

Must I ship to my billing address?

No, you can also direct the shipment to go to a Ship-To address.

How long does it take to process my order for shipment?

Loose diamonds are shipped the day of payment via FedEx Priority Overnight.

How long does it take to process my order for shipment?

Loose diamonds are shipped the day of payment via FedEx Priority Overnight.

How much does it cost to ship my order?

We provide fast, free shipping on all international orders including the cost of insurance.

Where do you ship?

We ship diamonds internationally, including the United States and Canada.

Return or Exchange

Can I return a diamond or exchange it for another item?

We strive for 100% satisfaction with every purchase. You may return your new undamaged item with its original packaging and paperwork for a 100% refund within 30 days of the item’s delivery. You may exchange the item for another piece of jewelry or another diamond within that same 30% return time. To do this, you must first contact our Customer Service for complete return policy details and to receive a RAN (Return Authorization Number).

How do I return a diamond?

Send the diamond back to us via FedEx Priority Overnight. Include all of the original documents. Please call our customer care office first to receive your RAN (Return Authorization Number)

Clarity Enhanced Options

What are enhanced diamonds and do you sell them?

Diamonds can be enhanced or treated in a number of ways. The goal generally is to improve clarity and therefore its beauty. We do sell treated diamonds. But all of our diamonds are naturally earth mined including the clarity enhanced diamonds. You can and should request a copy of your diamonds’ certification at the time of purchase.

How are diamonds clarity enhanced?

We use technologically advanced laser enhancing and filling. No visible trace of the enhancement process remains, and no carat weight is added. These enhanced diamonds are 100% natural diamonds that are genuine but with improved clarity. The diamonds’ clarity and quality improves but with a lower price than non-enhanced diamonds of similar clarity grade.

Can I find out more about this process?

Yes, go here to learn more about clarity enhanced diamonds.

Conflict-free Diamonds

I have heard about conflict-free diamonds. What are those?

Unfortunately, in today’s world, diamonds and gems are sometimes obtained at the cost of human rights violation, child abuse, or environmental destruction. Conflict free diamonds are guaranteed to be ethically sourced from suppliers that are free from these unfortunate practices.

What is Best Brilliance’ policy on conflict-free diamonds?

Our customers always receive conflict-free diamonds. We exceed all governmental regulations and requirements for ethically sourced diamonds.


Do you share any of my private information?

No, we never sell or share any of your personal information with third parties.

How do you safeguard my private information?

The personal information you supply us when purchasing a diamond is completely guarded and encrypted.

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