Wondering where to sell diamond jewelry and rings online? Look no further than Mondiamo

Our Offers

What do I need to do in order to receive an offer?
We’ll require the grading details of your diamond which can be found on your diamond grading report as well as information about the jewelry setting. Armed with this information, we will create a minimum guaranteed cash offer which will be emailed to you by the end of the next business day. Click here to get started.
Are there any fees or costs associated with getting an offer from Mondiamo?
No costs, no obligations. Our offers are provided free of charge.
What does a minimum guaranteed cash offer mean?
The minimum guaranteed cash offer is the amount we commit to before even seeing your diamond jewelry. In 100% of the cases, we end up paying more than the amount quoted in our minimum guaranteed offer.
What does a guaranteed cash offer range mean?

This means that we are committed to buying your item for an amount that is within the guaranteed range. The exact purchase price would be determined following the physical inspection of your item in our evaluation center. In all of the cases, our final purchase price is higher than the minimum of our guaranteed range. 

Can my diamond be evaluated based on my appraisal?
No. Appraisals are mostly used to determine the “retail replacement value” of a diamond jewelry article, and this value determines the annual insurance premium of your diamond jewelry. The “retail replacement value” does not reflect the market value of your diamond.
How long are your offers valid for?
Our offers are valid for 7 days.
What can I do if my offer expired?
Mondiamo keeps records of your diamond jewelry information and will be happy to prepare a new offer for you, based on the updated retail price of your diamond.
Is there anyone I can speak with about my offer?
We know that diamond pricing can sometimes get a bit confusing, and we are here to help. Our diamond specialists will gladly speak with you and explain everything in detail, so you feel empowered to make the right decision. Give us a call at 877.478.0485.
What currency is used in your offers?
All our offers are quoted in US Dollars.

Our Buying Criteria

Do you accept jewelry from outside the US?

Yes, we accept jewelry from all around the world.  Please be advised that offers made for purchases of jewelry from outside the US may be subject to applicable import duties and shipping fees based on seller location.

What type of jewelry does Mondiamo buy?
We buy any jewelry as long as it contains at least one diamond whose weight is at or above 0.30 carat.
Do you buy loose diamonds?
Yes. As long as they weigh at least 0.30 carat.
I want to sell the diamond and keep the ring. Is that possible?
Yes, we would unmount your diamond and send the setting back to you, free of charge.
Does my diamond need to have certain grading reports to be eligible for an offer?
Not at all. Whether you have a grading report or not, our simple online submission process ensures that we get all the information we need to create an offer for you.
Are there any legal requirements for selling my diamond jewelry?
Yes, we operate in a highly regulated environment and have to abide by very strict rules. You need to be able to prove your identity (e.g. ID or passport), that you are the legal owner of the item you are selling (e.g. receipt), and provide proof of address (e.g. a utility bill or a valid ID).

Know Your Numbers

How does Mondiamo come up with an offer?
Our key objective is to get you the highest value possible for your diamond jewelry. We teamed up with Blue Nile, the world’s largest marketplace for diamonds and use your diamond’s characteristics to identify a similar diamond on BlueNile.com. Based on the current retail price of a similar diamond, we create a transparent cash offer which is the minimum we would pay for your item before seeing it. In other words, the offer can only go up after we inspect your item. Click here to start.
How do you calculate the various elements in my offer?
Retail value - The retail value of your diamond is based on the actual price of a similar diamond currently available for sale on BlueNile.com. This is exactly how much it would cost you to buy a diamond like yours today. Diamond prices fluctuate and different retailers commend different margin, so this price may be different from the original price you paid for your diamond.
Wholesale value - The wholesale value typically ranges between 65%-70% of its retail value and may change from one retailer to another.
Setting value - The estimated setting value is the value of your jewelry’s metal and small stones. We add this amount to your offer. Unlike diamonds, the settings lose a significant portion of their value in the second-hand market. The price you paid for the setting was mostly driven by its design and labor costs, rather than the cost of metal and side stones. Should you want to keep the setting and sell us only your diamond, we will unmount the diamond and ship the setting back, free of charge.
Mondiamo fee - The Mondiamo Fee is the highest of 15% of the wholesale value of your item or US$300. It covers our various expenses, such as shipping, insurance, inspection, grading, financing, staff salaries, electricity bills and other operational costs. Yes, it also leaves us with some profit, but we strive to give you the highest price possible.
Will I get paid for the precious metal that my diamond is set in?
Yes, the market value of your settings’ precious metal and side stones will be calculated into the offer. However unlike diamonds, the settings lose a significant portion of their value in the second-hand market. The price you paid for the setting was mostly driven by its design and labor costs, rather than the cost of metal and side stones.
Should you want to keep the setting and sell us only your diamond, we will unmount the diamond and ship the setting back, free of charge.

Grading Reports

I have a Gemological Institute of America (GIA) diamond grading report, what information do I need to provide in order to receive an offer?
Easy! All we need is the grading report number, carat weight of your diamond, and a few details about your jewelry (however, old GIA grading reports may not be available for electronic retrieval, and we may need to receive your information manually). Click here to start.
What if I have a grading report, but not from the Gemological Institute of America (GIA)?
We can extend minimum guaranteed cash offers based on a wide range of grading reports. In some cases we would need you to ship your jewelry for evaluation before we provide you with a cash offer. Mondiamo will send you a free, fully-insured shipping kit to ensure your jewelry arrives safely & securely at our evaluation center. We will return it to you, free of charge, in case you decide you’d rather have your jewelry back.
I don’t have any grading report. What should I do?
Just let us know the characteristics of your diamond and jewelry. Our online submission process ensures that we get all the information we need to create an offer for you.
What if I don’t have a grading report and do not know my diamond’s characteristics?
Not a problem. Our diamond specialists will inspect your diamond, grade it, and prepare an offer. You just need to send your diamond jewelry to our New York evaluation center (shipping & insurance are on us). Follow our online submission process; we will take it from there.


Is it safe to send my valuable diamond jewelry with a courier?
Absolutely! We collaborate with FedEx and Brinks to ensure that our shipments are secure, fast, and fully insured to the minimum guaranteed offer amount.
Why do I need to send my diamond jewelry to Mondiamo?
We need to inspect your diamond in order to verify that it matches the grading information you provided, and to ensure that it is not damaged.
Do I need to pay for the shipment of my diamond jewelry to Mondiamo?
No. All shipping, handling and insurance costs are on us.
How do I arrange the shipment of my diamond jewelry to Mondiamo?
We do! Once you accept our minimum guaranteed offer, we will send you a shipping kit that includes the instructions and materials required to securely package your diamond jewelry. All you need to do is read the instructions, pack your jewelry, use the pre-paid shipping label we provide you and drop off the package at the nearest FedEx location. You can also arrange for pickup from your desired location. Did we mention that it is all free?
How long does shipping take?
We use FedEx overnight shipping services. Your jewelry will arrive at our evaluation center one business day after you shipped it, before you even had your dinner.
Will I be able to track my shipment?
Yes. You will be able to track your shipment with FedEx, using the tracking number on the free, insured, shipping label we provide you.


Will my diamond jewelry be insured?
Yes. Your diamond will be insured to the full amount of our minimum guaranteed offer, as long as you use the prepaid shipping label we provided you.
How much is my diamond jewelry insured for?
TThe insurance will cover any damage or loss up to the full amount of our minimum guaranteed offer to you.
Does the coverage expire?
The insurance is valid as long as you ship your item out within 10 days of receiving our prepaid shipping label. Should you want to ship your item later than that, we would issue you a new shipping label.


How do I get paid?

We offer two simple payment methods: check and bank transfer. If you’re unclear about what option is best for you, don’t hesitate to contact one of our customer care representatives to discuss each option (877.478.0485).

When do I get paid?

We will issue a payment as soon as your diamond is inspected and approved by our diamond specialists, usually within a few hours of its arrival to our evaluation center. Checks are mailed with USPS and typically arrive after 5-7 business days. Bank transfers are typically available in your account 2-3 business days after remittance.

How long does the whole process usually take?
Request an offer today, and you could be paid within 4 business days.
Are there any bank fees?

Please contact your bank for details.

What is a SWIFT number? Why would I need it and where do I find it?
A SWIFT number (also known as a Bank Identifier Code or BIC) is an international bank code that identifies particular banks worldwide and is used to make bank-to-bank wire transfers. It adds a layer of security to our process and ensures that the payment lands in your account. Please contact your bank to find out what your SWIFT code is.
Where do I find my routing and bank account numbers?

You can contact your bank to ensure that you have the right numbers. Routing numbers may be different than the numbers that appear on your checks.

Diamond Jewelry Inspection

What happens at the Mondiamo evaluation center once my diamond jewelry arrives?
Upon arrival to our New York evaluation center, your diamond jewelry will be inspected by one of our highly-experienced diamond specialists. The video recorded inspection process ensures that the diamond matches the information provided and that the diamond is not damaged beyond normal wear and tear.
Do you also grade the diamonds?
If your diamond is not accompanied by a reputable grading report, we will grade it in order to come up with an offer.
Would you need to unmount my diamond?
We normally do not need to unmount your diamond before we purchase it. In the very rare case the setting doesn’t allow us to inspect your item and your diamond is not accompanied by a reputable grading report, we will request your permission to unmount the diamond. Only after receiving your written consent will we unmount your diamond.

Blue Nile

Why did you partner with Blue Nile?
Bluenile.com is the world’s largest and most transparent market place for diamonds. We aim to provide you with the most accurate and up to date value for your diamond, and to be able to openly share it with you. Our exclusive access to Blue Nile’s database allows us to give you all the information you need to make the right decision and get the best value for your diamond jewelry. Moreover, Mondiamo and Blue Nile share the same values – educate and empower you, so that you could make the most informed decision about your diamond jewelry.
Would I get a discount on Blue Nile if I sell my diamond to Mondiamo?
Yes! Sell us your diamond jewelry and receive a $150 coupon code for your next purchase on Bluenile.com (Terms & Conditions apply).
How long does it take Mondiamo to send my offer?
It typically take us 1-3 business days to come back with a guaranteed cash offer range. Some diamonds, particularly unique and important ones, may take us longer to evaluate or require that we call you for additional information in order to realize the true value of your item. Thank you in advance for your patience.
More questions?
Give us a call at 877.478.0485

Our best in class service providers