Weiss has been providing the highest quality natural diamonds to jewelry stores in Japan as a wholesaler for over 30 years.
We take pride in our extensive inventory, which features a wide range of fancy shapes, fancy colors, colorless diamonds, and round diamonds. Thanks to our rich selection and skilled craftsmen, we also offer custom-made jewelry tailored to perfectly fit our customers' desires.
new products
新着商品
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18KYG Natural Diamond Tennis Bracelet - 3.86ct
Regular price ¥810,000 (Tax incl.)Unit price perNEW -
18K Near Colorless Diamond Radiant-cut Pendant Necklace - 1.192ct
Regular price ¥410,000 (Tax incl.)Unit price perNEW -
18K Colorless Diamond Cushion-cut Pendant Necklace - 1.04ct
Regular price ¥350,000 (Tax incl.)Unit price perNEW -
18K Colorless Diamond Earrings Emerald Cut - 0.83ct
Regular price ¥380,000 (Tax incl.)Unit price perNEW
rings
リング
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PT1000 Round-cut Colorless Diamond Ring - 0.506ct
Regular price ¥125,000 (Tax incl.)Unit price perSold out -
Mael Radiant Light Yellow Diamond Ring - 0.68ct
Regular price ¥280,000 (Tax incl.)Unit price per -
Mael Cushion Very Light Pink Diamond Ring - 0.25ct
Regular price ¥600,000 (Tax incl.)Unit price per -
Oval Fancy Orangy Pink Diamond Ring - 0.705ct
Regular price ¥500,000 (Tax incl.)Unit price per
necklaces
ネックレス
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Flower Design Diamond Pendant Necklace - 0.58ct
Regular price ¥225,000 (Tax incl.)Unit price perSold out -
Heart-Shaped 3 Stones Cluster Diamond Pendant Necklace - 2ct
Regular price ¥990,000 (Tax incl.)Unit price per -
Mael Oval Fancy Yellow Diamond Pendant Necklace - 0.625ct
Regular price ¥220,000 (Tax incl.)Unit price per -
Mael Old European Fancy Green Yellow Diamond Pendant Necklace - 0.487ct
Regular price ¥170,000 (Tax incl.)Unit price perSold out
bracelets
ブレスレット
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18KYG Natural Diamond Tennis Bracelet - 3.86ct
Regular price ¥810,000 (Tax incl.)Unit price perNEW -
Customizable Natural Diamond Bracelet 16cm
Regular price ¥377,000 (Tax incl.)Unit price per -
Diamond Natural Tennis Bracelet - 3.04ct
Regular price ¥550,000 (Tax incl.)Unit price per -
Diamond - Sapphire CVD Tennis Bracelet - 5.94ct
Regular price ¥440,000 (Tax incl.)Unit price per
earrings
イヤリング
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18K Colorless Round Diamond Earrings - 1.092ct
Regular price ¥350,000 (Tax incl.)Unit price perNEW -
Round Diamond Earrings - 0.731ct
Regular price ¥200,000 (Tax incl.)Unit price per -
18K White Gold Natural Diamond Halo Earrings Adjustable Design - 1.16ct
Regular price ¥325,000 (Tax incl.)Unit price perSold out -
Mael Cushion Fancy Yellow Diamond Earrings - 0.99ct
Regular price ¥460,000 (Tax incl.)Unit price per
diamonds
ダイヤモンド
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Natural Loose Diamond 0.906ct Colorless D Oval
Regular price ¥598,000 (Tax incl.)Unit price perSold out -
Natural Loose Diamond 0.558ct Fancy Deep Brownish Yellow Oval
Contact us for price inquiry.
Sold out -
Natural Loose Diamond 0.542ct Very Light Purplish Pink Oval
Contact us for price inquiry.
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Natural Loose Diamond 2.568ct Fancy Intense Orangy Yellow Oval
Contact us for price inquiry.
Sold out
reviews
お客様の声
L Ruin
November 4th, 2025
★★★★★
I bought a pink diamond ring online, which made me nervous at first. Yet it looked even more stunning in person and was much cheaper than I expected. The packaging was luxurious, and the setting was intricate, so the ring felt like a piece of art.Being able to find a high-quality pink diamond online, without visiting a store, was pure luck.
Donna L
October 21st, 2024
★★★★★
We easily found the perfect ring for a very reasonable price. we were ready to have to make another trip to Japan to pick up our ring in a few months time, but somehow Adi managed to get it ready for us to pick up during our trip! He was also very accommodating and allowed us to visit during a national holiday. Highly recommend him to anyone hunting for jewellery!
Lahiruni G
June 15th 2024
★★★★★
What a remarkable person is the CEO , customer service is on point, very kind and gentle, I bought my wedding ring with a center diamond, couldn’t be more happier. One of the best place for natural diamonds after searching all over Japan.
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Certified Diamonds
Choose from diamonds that come with authentic third-party certification from trusted laboratories.
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Custom Design
Create your unique jewelry piece at an unbeatable price.
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Lifetime Guarantee
Enjoy a lifetime guarantee on resizing, polishing, and coating by our experienced staff.
Get 100% trade-in value for a future upgrade.(The upgrade is at least double the original purchase (any discounts disqualify))
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Established Expertise
Over 50 years of experience serving clients worldwide, with a wide range of choices and budget-friendly diamond imports.
