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Vendez vos diamants chez ALLU dès aujourd’hui !

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Diamond

Les diamants ont conservé une valeur marchande élevée. Chez ALLU, vous pouvez vendre vos bagues et colliers contenant des métaux précieux, ainsi que des diamants et des minerais, aux prix les plus compétitifs. Notre personnel professionnel et expérimenté est prêt à évaluer vos articles de la meilleure façon qui soit. Nous acceptons les bagues, les pierres précieuses en vrac ou de petites tailles, et tous les types de bijoux en diamant. Il arrive que des augmentations de prix soient proposées pour des marques ou des créateurs spécifiques, alors apportez vos articles chez ALLU dès aujourd’hui !

Customers Without Certificate of Authenticity

Selling diamonds without certificates or documents of diamond authenticity will not negatively affect the selling price.
Please rest assured that our experienced Value Designers understand and know how to accurately value a piece of jewellery even without proof of authenticity.

Diamond Evaluation Criteria

What are the"4C" criteria?

CaratCarat

A diamond's carats are determined by its weight: 1ct = 0.2g. Since the rarity and value of diamonds depend on the size of the rough gemstone, even if the weight is the same, a single large diamond is worth many times more than the sum of several diamonds. However, the evaluation is not based on a simple "bigger is better" scale but results from the conjunction with the other 4C criteria.

ColourColour

The colour category of a diamond is determined by its degree of "colour" (colourlessness). There are 23 possible ranks, the highest being "D," the first letter of the word "Diamond." The closer the gem is to colourlessness, the higher the evaluation; as the rank decreases, the yellow hue in the gem becomes more intense.
*During a diamond's crafting process, other components may affect the carbon atoms, resulting in a variety of colours: such "coloured diamonds" may gain remarkable rarity and value, depending on the final colour.

ClarityClarity

The "clarity" criteria judges a diamond's transparency. It measures the size, number, and nature of inclusions, cracks and fissures that affect a diamond's appearance. The size, number, nature, shape, and location of inclusions, cracks, and fissures examined under 10x magnification and rated on a scale of 11.

CutCut

A diamond's "cut" refers to the "polishing technique" of the crafting. Unlike the other 4C criteria, the cut is not based on the value of the rough gemstone but on the craftsman's skill. A diamond's brilliance is further enhanced by its shape, determined through calculations based on optical science. The evaluation of the cut is determined by the "proportion factor," "finish factor" (symmetry) and the "polish," rated mainly on a scale of 5.

Selling Diamond at ALLU: Google Reviews

  • AB

    star1star1star1star1star1

    Excellent welcome and professional teams, I recommend.

  • PKY

    star1star1star1star1star1

    I was very well received at ALLU. The advisor who took care of me was very charming, patient and attentive to my needs. I really appreciated the quality of service I received.
    It’s not always easy to “leave” one’s possessions, but you feel less guilty when you’re well looked after. Thank you Mr. A.

  • EM

    star1star1star1star1star1

    I am extremely satisfied with my experience with this luxury goods buying and selling shop. I sold a high-end item, and everything went smoothly and professionally. The team demonstrated great expertise, offering a fair and transparent evaluation. The service was fast and courteous, and I was particularly impressed by the attention to detail throughout the process. I highly recommend this shop to anyone looking to sell or buy luxury items with confidence.

  • JV

    star1star1star1star1star1

    Very professional. No issues. 1-hour appointment to purchase the jewelry.

  • MC

    star1star1star1star1star1

    Great experience, very reliable company, I highly recommend it.

How to Sell

How to Sell Luxury Goods at ALLU

Increase the Selling Price of Your Jewellery!

  • Large diamonds of 1 carat or more are rare and can lead to higher selling prices.

  • Famous brands and luxurious designs can lead to higher selling prices.

  • Coloured diamonds are also rare and can lead to higher selling prices.

  • Diamonds of VS grade or above are rare and can lead to higher selling prices.

We Welcome Products in All Conditions
Even if Other Stores Rejected Your Item!

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Old Design Jewellery Image

We actively buy old models and outdated designs!

Bring in your scratched or worn items that other stores won't appraise.

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Loose Gemstone Jewellery Image

Loose gemstones and broken jewellery can be appraised!

ALLU also purchases damaged or broken jewellery. We will assess your jewellery no matter the condition of the item.

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Warranty and Authenticity Image

Warranty cards and authenticity certificates are not required!

Our expert Value Designers will accurately assess the value of your jewellery even without documents.

What We Buy at ALLU

  • Gold and Precious Metals
    Gold and Precious Metals
  • Watches
    Watches
  • Brand Bags
    Brand Bags
  • Brand Wallets
    Brand Wallets
  • Jewellery
    Jewellery
  • Accessories
    Accessories
  • Antiques
    Antiques
  • Brand Clothing
    Brand Clothing

■ Luxury Articles We Buy Back

Watches, jewelry, bags, wallets, accessories, clothing, shoes, antiques, gold and precious metals. For other items, please contact us for details.

ALLU Offers Much More than High Selling Prices!

1

Reliable, credible, and trustworthy appraisals

Our knowledgeable and experienced experts provide accurate appraisals
Appraisal and Customer Service Training

Our staff undergo thorough training under the tutelage of specialists in various fields, such as watches and jewellery, that allow us to provide the most accurate, detailed, and credible appraisals. We conduct periodic in-house tests to ensure our employees maintain their expertise and develop new skills. As professionals, we constantly strive to improve our skills to provide the most competitive appraisals.

2

Focus on providing high-quality customer service

Focus on providing high-quality customer service

We make the selling process as simple as possible, and our staff ensures that our customers understand and are satisfied with each appraisal.

3

We purchase a wide variety of items and brands

We purchase a wide variety of items and brands

We cater for an extensive range of items and brands and actively consider items in all conditions, even items our competitors may refuse to buy.

4

No selling quantity or price limits

No selling quantity or price limits

For customers with large amounts or significantly expensive items, we buy and pay on the day without any limits in quantity or value.

5

Quick and easy appraisals

Quick and easy appraisals

Through our expert proficiency and globally vast product data collection, we provide speedy appraisals with minimal waiting time.

6

Stress-free and private spaces

Stress-free and private spaces

We strive to create the most stress-free selling experience with store spaces designed to ensure comfort and privacy.

7

Conveniently located stores

Conveniently located stores

ALLU stores are located in central areas for convenient access. Feel free to stop by while shopping or on the way home.

How to Sell

How to Sell Luxury Goods at ALLU

Shop Information

You Only Need an I.D. to Sell at ALLU!

Required Form of Identification
  • Driver's Licence
  • Passport
  • Only one of the above forms of identification is required.
  • We can not buy items from customers under the age of 18 years old.
  • We do not accept identification documents that are expired or out-of-date.
  • Corporate customers follow the same selling process as individual customers. No additional documentation is required.
Visit our FAQ section for more information

Learn About Market Prices and Valuation! Diamond Selling Price FAQ

Is it possible to sell old or antique diamonds?

Yes, one of our target areas is old and antique diamonds. However, our appraisals are based on modern criteria, so the assessment of quality and selling price may differ from the original purchase price of the diamond.

Can I sell a diamond even without a certificate of authenticity?

Yes, it is possible to sell diamonds even without a certificate of authenticity. Our appraisal staff will confirm the quality of your diamond and offer you a corresponding selling price.

Is there anything I should bring with me when visiting for an appraisal?

If you still have a professional’s written appraisal for the piece you want to sell, please bring it. If you have a written appraisal, the 4 C’s used to assess diamonds, as well as with the grade will be included—having that information available will allow us to complete the appraisal in a timely manner.

What is the term “LDH” that I found in my diamond’s written appraisal?

“LDH” is an acronym that stands for Laser Drill Hole. This is a diamond repair technique that entails drilling a minuscule hole on the surface or into the interior of a diamond so that acid or other solutions may be poured in to erase scratch marks. The mention of this term in your appraisal indicates that this procedure has been carried out on your diamond.

What are the 4 C’s?

The 4 C’s stand for Carat, Cut, Colour and Clarity, four criteria that are used to assess the quality of a diamond.

Is it possible to get an estimate for a selling price over the phone (if I want to get an idea of the carat count, etc)?

Even if you are only looking for a rough estimate of a diamond’s carat count, it would be difficult to determine the quality of a diamond without seeing it in person, so we are unable to provide this service at the moment. However, we are able to provide assessments of quality that include carat counts as well as selling prices to our customers who visit us in person, so please consider visiting an ALLU location for an assessment.

If I tell you the size of my diamond in millimetres, can you tell me the carat count?

Because a diamond’s carat value is calculated by weight, not size, we would be unable to inform you of its carat count based solely on its size in millimetres. If you visit us in person, we can tell you the carat value and an assortment of other information included in our appraisal, so please consider visiting an ALLU location.

What are melee/pavé diamonds?

Melee or pavé is a term ascribed to diamonds with a measure of less than 0.1 ct. At ALLU, we welcome jewellery featuring pavé diamonds, so if you have any such pieces, please consider bringing them in.

Do you buy loose diamonds?

Yes, loose diamonds are one of our target areas at ALLU, so please bring them in.

What items can I sell for a high price?

ALLU offers premium selling prices for diamonds, especially those with a high 4C grade. As for jewellery, we buy gemstones, accent stones, accessories, and bullion and will provide detailed assessments for each item category.

Does the strength of the yen affect selling prices?

Because many diamonds and gemstones are imported from outside of Japan, foreign exchange rates do influence our selling prices. In the case of a weak yen, market prices and pre-owned market prices will increase, leading to increased selling prices at ALLU.

I have a diamond necklace made of gold—would you also offer appraisals for the gold necklace part and not just the diamond?

Yes, we will take into account the various parts of any item, both precious metals and gemstones, and offer a selling price based on the values of every component.

Can I get an appraisal for my diamond via WhatsApp?

Yes, if you would like an appraisal for your diamond via WhatsApp, please send us a picture of your diamond as well as a picture of its written appraisal document. We will reply with a rough estimate for your diamond.

In what ways can I sell my diamonds?

We offer several appraisal options when buying customers’ diamonds: we conduct in-person appraisals at our stores, as well as appraisals by mail and even can send representatives from ALLU to conduct an appraisal at locations other than our stores, so please feel free to utilise these various options. ※ Please understand that diamond appraisal via online video calls are unavailable due to the difficulty of assessing the quality of a diamond without being able to see it in person.

Sell Popular Diamond Models

Sell Your Jewellery

> Jewellery Item List

Sell Your Gold and Precious Metals

> Gold and Precious Metals Item List

ALLU Frequently Asked Questions

Can I sell items that are broken or in poor condition?

Yes, we can often purchase such items.

Items that are worn
Items that are scratched or dirty
Items with missing gemstones
Items with older designs

If you ever were refused by other stores when trying to sell your item for reasons such as the above, please visit us at ALLU.

Can I still sell items without a certificate of authenticity?

Yes. Even if you do not have a certificate of authenticity, our experienced Value Designers will carefully and accurately evaluate your jewellery.

Can I sell loose or rough gemstones?

Yes. In many cases — especially in the case of diamonds — if the grade is high, you can sell even loose gemstones at high prices.

Can I sell non-branded jewellery?

Yes, you can sell jewellery at ALLU regardless of the brand.

I received a higher selling price at another store.

We will do our best to meet your expectations, so please let us know how much the other company’s evaluation was.

Do selling prices vary from store to store?

No. All of our stores use the same standards for evaluation.

Do I need to make an appointment?

Yes. We ask that customers make an appointment via WhatsApp first so we can make sure that the appraisal can go smoothly.

How long does it take for an appraisal at the store?

We estimate 10 to 15 minutes for a single item. It depends on the item and the quantity, so please ask our staff when you visit.