OTAKARAYA offers high-value buybacks with over 1,690 stores worldwide.
Founded 25 years ago, we present 9 reasons why OTAKARAYA, Japan's industry leader, boasts high-value buybacks.
Visit a Specialized 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!
Ruby Reference Purchase Price
Last updated: 16/03/2026
| 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.
Reference Purchase Prices for Ruby
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.
*Images are for illustrative purposes only.
*Reference purchase price applies only when the hallmarked purity matches the specific gravity reading.
*Reference purchase price applies only when the hallmarked purity matches the specific gravity reading.
Advice for High-Price Ruby Purchase and Appraisal
In the purchase of rubies, the intensity of the color is the most important factor, with brighter red hues and greater transparency increasing the value. Given the high market prices for gold and platinum, now is a great time to sell accessories with gemstones. Since gemstones can degrade over time, it's ideal to sell them as early as possible.
Factors that Determine the Value of Rubies
Color
The most important factor in determining the value of a ruby, often referred to as the "queen of gemstones," is its color. Ruby is the red variety of corundum, a crystal made of aluminum oxide, while other colors of corundum are called sapphires. The highest quality rubies are almost free of impurities, featuring vivid, high-saturation red colors, or slightly purplish-red hues. Among them, the deep red with a hint of blue, known as "Pigeon Blood," is especially highly valued. On the other hand, rubies with an orange tint or those that are too purple are considered less valuable.
Clarity
Rubies generally contain many inclusions. Rubies with fewer inclusions have higher transparency, and their beautiful red glow increases their rarity and value. An exception is the "Star Ruby," which contains needle-like rutile crystals known as silk inclusions. These rubies emit a star-shaped light and are particularly highly valued.
Carat
The value of a ruby, like other colored gemstones, is assessed based on factors such as color, clarity, and cut. For rubies of the same quality, a larger carat weight will typically result in a higher price. Especially large rubies are extremely rare, and once they exceed 1 carat, their price increases significantly. The price difference between a 0.8-carat and a 1-carat ruby of the same quality can sometimes be as much as 11 times.
Treatment
Gemstones may undergo treatments to enhance their color and appearance, in addition to cutting and polishing. For rubies, heat treatment is recognized as a method to enhance color vibrancy and bring out their natural beauty. Most rubies undergo heat treatment, but those that are untreated are rare and command higher prices. On the other hand, rubies that have been subjected to diffusion treatment or lead glass filling have a lower value.
Origin
The finest rubies come from Myanmar (formerly Burma), with those from the Mogok region being particularly famous. Rubies from this area are known for their high transparency and deep, beautiful red color. They also have the unique characteristic of glowing intensely red under ultraviolet light. The rubies referred to as "Pigeon Blood" come from this region and are highly prized. In recent years, vivid red rubies have also been mined in Tanzania from the Windsor and Montepuez mines, and these are now valued alongside rubies from Myanmar (formerly Burma).
The criteria for evaluating Rubies?
Ruby Quality Evaluation
The quality of a ruby is evaluated based on factors such as its color, brilliance, and size. Among these, color is particularly important, with deeper hues being valued more highly.
Ruby Processing Treatments
Most ruby rough stones lack transparency, and nearly all rubies on the market have undergone heat treatment. The heating method varies depending on the origin and quality of the ruby, and the performance of the heating equipment and the skill of the technician also influence the final result.
Ruby Origins
The sources of rubies are limited to regions such as Myanmar, Thailand, Vietnam, and Cambodia. Among these, Myanmar rubies are known for their high quality, and the finest rubies, referred to as "Pigeon Blood Rubies," are mined in the Mogok region of Myanmar.
Color of Rubies with High Price Purchase Evaluation
Red Color
Among rubies, those with vivid red or deep purplish-red hues command higher prices.
Pigeon Blood
This term refers to rubies with a vivid red color resembling the fresh blood of a pigeon. Compared to other rubies, a 1-carat Pigeon Blood ruby can fetch over ten times the price, making it highly valuable for purchase.
Cherry Pink
These rubies have very high transparency and a bright tone similar to pink sapphires, which makes them quite popular.
Beef Blood
Mostly found in Thailand, these rubies have a dark red color resembling beef blood. They contain a high level of iron, giving them a slightly blackened appearance. Although they do not have high transparency, they are highly valued for their luxury and rarity.
Visit a Specialized Purchase Store Otakaraya
to Sell and Appraise Your Ruby
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.
Rika Iwamatsu
Profile
：Started working at a gemological laboratory and has been involved in diamond grading and gemstone identification for nearly 30 years.
Qualifications：GG (Graduate Gemologist) - obtained in May 1994
Hometown：Tokyo
Hobbies：Traveling
02 Latest appraisal equipment of Otakaraya
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.
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.
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.
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 1,690 Stores Worldwide
A boasts over 1,690 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!
About Ruby Certificates
Certificate of Authenticity / Certificate of Origin
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.
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- 1 Report Number
-
A unique identification number for each certificate.
-
- 2 Shape
-
Cut Shape
-
- 3 Upper Cutting
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The outline of the crown portion is described.
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- 4 Lower Cutting
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The outline of the pavilion portion is described.
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- 5 Color and Transparency
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Details the quality of the gemstone's color and transparency.
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- 6 Colour
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Lists the color grade
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- 7 Mineral Name
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Lists the name of the mineral.
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- 8 Gemstone Name
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Specifies the name of the gemstone.
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- 9 Origin
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Lists the gemstone’s origin or place of mining.
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- 10 Treatment
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Note on Treatment
-
- 11 Item
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Information about the metal and gemstones
-
- 12 Weight
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Weight information
-
- 13 Size
-
Dimensions listed in millimeters
-
- 14 Remarks
-
Other important information to be included in the certificate
Ruby Ring
Ruby Necklace
Ruby Bracelet
Ruby Earrings
ANY CONDITION!
Don't give up just because
it's
"BROKEN," "DIRTY" or "OLD"!
OTAKARAYA enchancing purchase offers
for Gemstones / Jewelry in any condition!
for PURCHASE!
We accept items
even if accessories such as
appraisal or authenticity
certificates are not included.
Cracks
Prominent
Scratches
Loose stones
Engraved
initials and dates
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!
Introduction of Appraisers
Iwamatsu
-
Hobbies
Travel
-
Favorite phrase
Actions speak louder than words
-
Favorite brand
Diamonds and Jewelry
-
Past purchase examples
10-carat Diamond
At OTAKARAYA, we assess hundreds of gemstones every day, both large and small. The value of gemstones can fluctuate greatly depending on various factors such as the 4Cs of diamonds, color, shape, weight, and fluorescence. OTAKARAYA holds its own auctions, allowing us to respond quickly and sensitively to daily gemstone demand. Regarding assessments, we have professional staff and specialized tools such as diamond testers, enabling accurate evaluations at our stores worldwide If you're interested in any items, please feel free to use OTAKARAYA's services.
9 Reasons for Ruby High-Value Buybacks
01
Professional valuation that understands value
We have know-how accumulated through 25 years of history!
02
A dedicated buyback shop
Achieving high-value buybacks in countries around the world!
03
Over 1,690 stores!
Buyback know-how from around the world is concentrated in each store!
04
Transaction records with countries around the world
With business partners in each country, OTAKARAYA can set buyback prices on a global standard!
05
Wide range of buyback items
Even items you wonder if you can sell can be bought back at a high value without missing their true worth!
06
The highest level of valuation environment
Discerning true value, we can present the buyback amount to customers!
07
Same-day cash buyback
Even for high-value transactions, we can provide cash on the spot!
08
High-value buyback campaign
We pursue high-value buybacks that satisfy our customers!
09
Cost reduction through in-house auctions
By keeping sales costs down, we can set higher buyback amounts!
Search from OTAKARAYA's Purchase Items
Gold Purchase
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Purchase
Brand Watch Purchase
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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
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!
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!
