The reference buyback prices mentioned above fluctuate based on timing and market conditions.
Furthermore, prices vary depending on the shape/form of the item. Please contact us by phone for detailed inquiries.
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Visit a High-value Purchase Store Otakaraya to Sell and Appraise Your
Ruby
Would you like to know
the value of your gemstones?
the value of your gemstones?
Free appraisal
by "Otakaraya"
by "Otakaraya"
the high-price
purchase
professionals.
purchase
professionals.
Available 24/7 for free!
Get an appraisal with just one photo!
Consultations are very welcome!
Get an appraisal with just one photo!
Consultations are very welcome!
Your Purchase Price
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Ruby Reference Purchase Price
Last updated: 12/10/2026
| S | A | B | C | D | |
|---|---|---|---|---|---|
| 0.8カラット | 17,000 | 9,000 | 5,000 | 2,000 | 200 |
| 1カラット | 190,000 | 120,000 | 70,000 | 45,000 | 12,000 |
| 2カラット | 420,000 | 240,000 | 140,000 | 100,000 | 12,000 |
| 3カラット | 930,000 | 600,000 | 350,000 | 220,000 | 50,000 |
| 5カラット | 2,550,000 | 1,080,000 | 580,000 | 300,000 | 55,000 |
| 10カラット | 7,200,000 | 3,700,000 | 2,300,000 | 800,000 | 230,000 |
| S rank | A rank | B rank | C rank | D rank | |
|---|---|---|---|---|---|
| Colour | Deep color | Slightly deep | Normal | Light or Slightly dark | Very light or Quite dark |
| Clarity | No inclusions | Slight inclusions | Slightly cloudy transparency | No transparency | Quite cloudy |
- *The purchase price may vary depending on the condition of the item and the timing.
- *The ranking is based on our standards.
Gemstones / Jewelry Reference Buyback Price
*Images are for illustrative purposes only.
*The purchase price may vary depending on the condition of the item and whether any accessories are included.
*The reference purchase prices are estimated values based on our auction transaction history and other relevant factors. They do not guarantee the actual purchase price, which will vary depending on exchange rate fluctuations, the condition of the item and market trends.
Visit Otakaraya to Sell Your Jewelry
01 The staff includes holders of the GG (Graduate Gemologist) qualification.
The GG (Graduate Gemologist) qualification is a prestigious gemologist certification awarded by the Gemological Institute of America (GIA), recognized globally as one of the most authoritative credentials. At Otakaraya, we have staff members who hold the GG qualification, and we also provide regular gemologist training through our in-house educational program. As a result, we are capable of performing highly accurate and high-level assessments of all types of gemstones.
02 Latest appraisal equipment of Otakaraya
01
UV-Visible Near-Infrared Spectrophotometer
When visible light (light that can be seen by the human eye) passes through a substance, some of the light is absorbed by the material. The UV-Visible Near-Infrared Spectrophotometer is excellent at analyzing the wavelengths of the absorbed light. At 'Otakaraya,' this instrument is used to inspect treatments applied to diamonds and the treatments on gold-based white pearls, allowing for accurate assessment of the gem's value.
02
Fourier Transform Infrared Spectrophotometer
The Fourier Transform Infrared Spectrophotometer is a precision instrument that analyzes samples by shining infrared light onto them and measuring the transmitted or reflected light. At 'Otakaraya,' this equipment is used for a wide range of tests, including examining the presence of resin impregnation treatments in jade and conducting specific tests on diamonds.
03
Type I and Type II Determiner
The sample is placed inside the determiner, and ultraviolet light is applied to assess the diamond by its transmission rate. In just one second, the device can determine whether the diamond is Type I (natural diamond) or Type II (high-temperature, high-pressure treated diamond or synthetic diamond). The device can assess both loose diamonds and diamonds set in a setting, allowing for measurement without removing the stone from the setting. It provides quick and accurate evaluation without damaging your items.
04
Moissanite Determiner
After cleaning the surface of the gemstone, the probe is applied to the sample. The electrical conductivity measured by the device is used to determine whether the stone is a diamond or moissanite. Similar to the Type I and II determiner, it provides instant and accurate assessments.
03 Evaluation of Design and Brand Value
At Otakaraya, we not only assess the intrinsic value of the gemstones themselves but also take into account the brand value and design when determining the appraisal value.
We ensure that even small gemstones are thoroughly evaluated, and we can offer a purchase regardless of whether the item has accessories or a box.
04 All Fees Are Free for Purchase
Appraisal fee is completely free, with no burden placed on the customer.
We offer a variety of purchasing methods, including, in-store, and email appraisals.
05 Network of Over 2,070 Stores Worldwide
A boasts over 2,070 stores worldwide, the largest number among purchasing stores.
If you bring your item to a nearby Otakaraya store, you can receive immediate cash payment.
Additionally, Otakaraya has a proven track record of transactions with 44 countries worldwide, handling large-scale transactions not only with individuals but also with corporations and businesses.
In addition to diamonds, Otakaraya also purchases a wide range of gemstones, including rubies, sapphires, and more.
Would you like to know
the value of your gemstones?
the value of your gemstones?
Free appraisal
by "Otakaraya"
by "Otakaraya"
the high-price
purchase
professionals.
purchase
professionals.
Available 24/7 for free!
Get an appraisal with just one photo!
Consultations are very welcome!
Get an appraisal with just one photo!
Consultations are very welcome!
Your Purchase Price
35% Bonus Special Promotion
About Ruby Certificates
What Are Grading Reports and Certificates?
When purchasing a gemstone, it may come with a gemological certificate identifying its origin and type based on scientific testing or a grading report indicating its quality and grade. Ideally, these documents should be kept together with the gemstone when selling it, although they are often misplaced or lost over time. Some people assume that gemstones without grading reports receive lower appraisal prices. However, at OTAKARAYA, we are also able to provide competitive appraisal prices for gemstones even without accompanying documentation.
How to Read a Ruby Grading Report
When purchasing an ruby, a certificate of origin and type, which indicates the origin and nature of the stone, is usually provided. If you have this certificate, please bring it along when selling the gemstone. However, at Otakaraya, we accept purchases even without a certificate of authenticity or origin, so there is no need to request a reissuance.
Click the image to enlarge.
-
1Report Number
A unique identification number for each certificate.
-
2Shape
Cut Shape
-
3Upper Cutting
The outline of the crown portion is described.
-
4Lower Cutting
The outline of the pavilion portion is described.
-
5Color and Transparency
Details the quality of the gemstone's color and transparency.
-
6Colour
Lists the color grade
-
7Mineral Name
Lists the name of the mineral.
-
8Gemstone Name
Specifies the name of the gemstone.
-
9Origin
Lists the gemstone’s origin or place of mining.
-
10Treatment
Note on Treatment
-
11Item
Information about the metal and gemstones
-
12Weight
Weight information
-
13Size
Dimensions listed in millimeters
-
14Remarks
Other important information to be included in the certificate
Grading reports can be reissued.
Even if you lose your grading report, it can usually be reissued through organisations such as the Central Gem Laboratory (CGL) or the GIA. However, reissuing a grading report may require additional fees of approximately SGD 20–100, as well as time and effort. If the diamond is set in a ring, there is also a risk of damage when removing the stone for inspection. Since grading reports themselves do not directly determine the value of a gemstone, we recommend choosing a trusted appraisal company with strong expertise and reliable evaluation standards.
The staff includes holders of the GG (Graduate Gemologist) qualification.
The G.G. (Graduate Gemologist) qualification awarded by the GIA is internationally recognised as one of the most respected credentials in the field of gemology. Because of this expertise, our appraisers are able to provide accurate and reliable evaluations even without a grading report. If you are unsure about the appraisal price, you are welcome to start with an appraisal only. All appraisals at OTAKARAYA are completely free of charge.
Customers without a certificate of appraisal
It is possible to make a purchase even without a certificate of appraisal. At "Otakaraya," our appraisers, who have completed specialized training, will conduct the evaluation. You can rely on us with confidence.
Ruby Ring
Ruby Necklace
Ruby Bracelet
Ruby Earrings
Even if your jewelry is scratched, missing a grading report, or you’re unsure what type of gemstone it is,
it may still hold value!
OTAKARAYA is actively accepting items for appraisal and purchase!
Items in any condition are welcome.
You can count on OTAKARAYA for a reliable appraisal.
Wondering whether items in poor condition can still be appraised? At OTAKARAYA, we actively appraise and purchase luxury items even if they are damaged or show signs of wear. Whether it’s a broken bag or an older model, your item may still hold significant value. Feel free to start with a free appraisal.
Recent Purchase Examples
We Purchase Items Even in These Conditions
-
Loose gemstones
The gemstone has come loose from its setting.
-
No grading report
The gemstone alone, without a grading report or certificate.
-
Unknown gemstone type
Unsure of the cut or gemstone type
-
Cracks or fractures
The gemstone is cracked or fractured.
-
Chipped
The gemstone is chipped due to an impact.
-
Scratches
Scuffed or deeply scratched.
-
Unbranded
Unknown brand
-
Discoloration or stains
Discolored due to age or affected by stubborn stains.
Would you like to know
the value of your gemstones?
the value of your gemstones?
Free appraisal
by "Otakaraya"
by "Otakaraya"
the high-price
purchase
professionals.
purchase
professionals.
Available 24/7 for free!
Get an appraisal with just one photo!
Consultations are very welcome!
Get an appraisal with just one photo!
Consultations are very welcome!
Your Purchase Price
35% Bonus Special Promotion
Types of Gems & Jewellery We Can Buy at OTAKARAYA
Search by Gemstone and Colored Stone
Search by Jewelry Brand Name
Browse by Gold & Precious Metal Purchase Items
Types of
Diamonds and Gemstones (Jewelry)
Can Be Sold at Otakaraya
OTAKARAYA conducts high-value purchases of various gemstones, including diamonds.
Feel free to apply for the appraisal of any unused gemstones
(jewelry) you have on hand.
Ruby Purchase List
necklace
bracelet
ring
Frequently Asked Questions
about Ruby Purchase
When is the best time to sell diamonds?
The best time to sell diamonds can vary. Sometimes, the right opportunity arises quickly, while at other times, holding onto them for a longer period can increase their value. It is difficult to pinpoint a universally ideal time. If you plan to keep your diamonds for a longer duration before selling, it is essential to store them properly. We recommend using appropriate storage methods and performing regular maintenance to preserve their condition.
Can I sell diamonds without a certificate?
Yes, you can. Our appraisers will evaluate the diamond 4Cs (Carat, Color, Clarity, and Cut) and provide you with a purchase price.
Does the design affect the purchase price?
For gemstone purchases, the grade of the diamond itself is crucial. Even with an older design, Otakaraya ensures a high-value purchase, so you can rest assured.
Does the shape of the diamond affect the purchase price?
Yes, the purchase price varies by shape. The "round brilliant cut" is the most highly valued cut for diamonds. The purchase price also changes depending on the diamond's grade, so feel free to take advantage of our free appraisal service.
Do specialty gemstone purchase shops offer higher prices?
At Otakaraya, we handle a wide range of items, including diamonds, gemstones, jewelry, gold, precious metals, branded items, and watches. This extensive sales network allows us to avoid holding excess inventory, enabling us to offer the highest possible prices for your items.
Can melee diamonds (pavé diamonds) be purchased?
Yes, they can be purchased. Jewelry adorned with melee diamonds (pavé diamonds) may receive a higher appraisal value. However, loose stones may not be eligible for purchase.
Would you like to know
the value of your gemstones?
the value of your gemstones?
Free appraisal
by "Otakaraya"
by "Otakaraya"
the high-price
purchase
professionals.
purchase
professionals.
Available 24/7 for free!
Get an appraisal with just one photo!
Consultations are very welcome!
Get an appraisal with just one photo!
Consultations are very welcome!
Your Purchase Price
35% Bonus Special Promotion
