Visit a Specialized Purchase Store Otakaraya to Appraise and Sell Your Gemstones / Jewellery
Visit a Specialized Purchase Store Otakaraya to Appraise and Sell Your Gemstones / Jewellery
At Otakaraya, we purchase a wide range of items, from precious stones such as diamonds, rubies, sapphires, and emeralds to luxury jewelry crafted from gold and platinum. Diamonds are evaluated based on the 4Cs (carat, color, clarity, and cut), while other gemstones are accurately assessed by our expert appraisers according to their characteristics and rarity. We also take into account the design and condition of the jewelry, ensuring that we offer a satisfactory price. Please feel free to consult with us if you are considering selling.
Jewels Currently Under Priority Purchase:


9 Reasons Why You Can Sell for High Value Here
Specialty Purchase Store OTAKARAYA with Over
1,400 Stores Worldwide
For 25 years since our founding, we,
"OTAKARAYA", the industry's largest leader, are
proud to present 9 reasons why we offer
high-value purchases.

Professional Appraisals with Expertise
Our 25 years of history have allowed us to accumulate unparalleled know-how!

Specialized Purchasing Stores
By being deeply rooted in local communities, we achieve high-value purchases!

Over 1,400 Stores Worldwide
Worldwide Purchasing Expertise Centralized at Each Store!

Trading Experience with 44 Countries Worldwide
With OTAKARAYA's Global Partnerships, We Offer World-Class Purchase Prices!

Wide Range of Items Accepted
With trade partners in multiple countries, we provide purchase prices that meet global standards!

Top-Tier Appraisal Environment
We discern the true value of your items and present purchase prices with confidence!


Free Appraisal, No Service Fee
We will cover all expenses!

High-Price Purchase Campaign
We strive to offer high-value purchases to ensure customer satisfaction!

Cost Reduction Through In-House Auctions
By minimizing sales costs, we can set higher purchase prices!


Visit a Specialized Purchase Store Otakaraya to Sell Your Gemstones / Jewellery
Do you have unused gemstones or jewelry lying dormant? It's a waste to leave them unused just because of reasons like "old design" or "scratches." At "Otakaraya," we offer high-price purchases even for broken jewelry or old designs. We purchase not only diamonds but also color stones like sapphires, rubies, and emeralds. You can also bring in loose stones (gems only), and our professional appraisers will assess their quality and grade. Whether it's a ring that no longer fits, a necklace that's broken, or jewelry that has become dirty over time, we can still make an offer. We will provide an estimate after evaluating the items, so feel free to bring them in. At "Otakaraya," we have specialists in diamond and gemstone purchasing, including a GIA G.G. certified appraiser, so you can bring your items in with confidence. If you want to sell your gemstones or jewelry for the best price, please visit us by all means.
Points for Gemstone and Jewelry Purchase
Gemstones are a limited resource created by nature, and their prices are highly influenced not only by their size and grade but also by factors such as market supply and circulation. As a result, some dealers may try to offer low purchase prices in order to maximize their profits. However, at Otarakaya, we have established stable sales channels, enabling us to buy high and sell high. Even if you were unsatisfied with other dealers' appraisals, we are confident that we can offer you a price that meets your expectations.
About Diamond Certificates

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- 1 Cut & Shape
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The diamond's external shape and facet arrangement are described.
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- 2 Weight (Carat)
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The weight is evaluated as 1 carat = 0.2g (200mg).
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- 3 Color Grade
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The diamond's color intensity is evaluated using GIA Master Stones (JJA/AGL certified) on a scale from D to Z.
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- 4 Clarity Grade
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The diamond's inclusions—quantity, size, color, and location—are evaluated using grades such as FL, IF, VVS1VVS2, VS1VS2, SI1SI2, and I1I3.
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- 5 Cut Grade
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The cut is evaluated through the GIA Facetware Cut Estimator database and visual assessment with grades ranging from Excellent, Very Good, Good, Fair, to Poor.
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- 6 Fluorescence
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The color and intensity of fluorescence are evaluated using a fluorescence master stone with grades from None, Faint, Medium, Strong, to Very Strong.



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
Introduction of Appraisers
Appraiser
Appraiser

- Iwamatsu
-
Hobbies Travel Favorite Quote '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.
Frequently Asked Questions About Diamond Purchases
- 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.