Showing 39 of 39
Loose Yellow Diamonds
イエローダイヤモンドルース
-
Natural Loose Diamond 1.514ct Fancy Deep Brownish Greenish Yellow Cushion
Contact us for price inquiry.
-
Natural Loose Diamond 1.01ct Fancy Yellow Cushion
Contact us for price inquiry.
-
Natural Loose Diamond 2.038ct Light Yellow S Cushion
Regular price ¥1,150,000 (Tax incl.)Unit price per -
Natural Loose Diamond 1.102ct Light Yellow S Round
Regular price ¥480,000 (Tax incl.)Unit price per -
Natural Loose Diamond 5.01ct M Faint Yellow VS1 Oval-cut
Regular price ¥5,500,000 (Tax incl.)Unit price per -
Sold outNatural Loose Diamond 0.638ct Fancy Light Yellow Princess-cut
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 10.016ct Very Light Yellow N Oval
Regular price ¥13,500,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 2ct Faint Yellow M Rose-cut
Regular price ¥760,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 2.568ct Fancy Intense Orangy Yellow Oval
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 0.772ct Light Yellow S Cushion
Regular price ¥140,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 1.04ct Very Light Yellow N Oval
Regular price ¥400,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 1.549ct Fancy Yellow Pear
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.52ct Fancy Yellow Radiant
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.2ct Fancy Yellow Radiant
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 0.915ct Fancy Yellow Radiant
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.05ct Light Yellow W Cushion
Regular price ¥420,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 1ct Faint Yellow M Marquise
Regular price ¥390,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 0.912ct Faint Yellow K Princess-cut
Regular price ¥250,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 0.79ct Fancy Yellow Radiant
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.51ct Fancy Vivid Yellow Cushion
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 3.011ct Very Light Yellow N Oval
Regular price ¥2,400,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 0.615ct Fancy Vivid Orangy Yellow Cushion
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 0.529ct Fancy Vivid Orangy Yellow Cushion
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 0.527ct Fancy Vivid Orangy Yellow Cushion
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.53ct Very Light Greenish Yellow Cushion
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.5ct Fancy Deep Yellow Heart
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.0ct Fancy Intense Yellow Cushion
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 2.013ct Light Greenish Yellow Cushion
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.028ct Fancy Greenish Yellow Pear
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 3.015ct Light Yellow S Marquise
Regular price ¥2,398,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 3.195ct Faint Yellow M Radiant Cut
Regular price ¥2,090,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 0.697ct Fancy Dark Brownish Yellow
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.005ct Fancy Intense Yellow Cushion
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.81ct Fancy Light Greenish Yellow Radiant
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.07ct Fancy Yellow Princess-cut
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 0.839ct Fancy Yellow Radiant
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 0.504ct Fancy Deep Yellow Pear
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Diamond 1.009ct Very Light Yellow N Cushion
Regular price ¥250,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Diamond 0.558ct Fancy Deep Brownish Yellow Oval
Contact us for price inquiry.
Sold out
Frequently Asked Questions
A loose yellow diamond is an unmounted, unset stone — meaning it has not yet been placed into a ring, pendant, or any other jewellery setting. Purchasing a loose diamond gives you the freedom to assess the stone directly against its grading report, evaluate all four Cs (colour, clarity, cut, and carat) with full transparency, and then choose or design a setting that perfectly complements it. It is the preferred choice for buyers who want to maximise quality, value, and personalisation. Browse our yellow diamond ring collection if you are looking for a finished piece, or contact us to discuss a custom design.
Loose yellow diamonds are graded using the GIA (Gemological Institute of America) 4C system, with particular emphasis on colour for fancy colour stones. The colour scale runs from Faint → Very Light → Light → Fancy Light → Fancy → Fancy Intense → Fancy Vivid / Fancy Deep / Fancy Dark. The deeper and more saturated the yellow, the rarer and more valuable the stone. Clarity is graded from Flawless (FL) to Included (I3), and cut quality influences how brilliantly the stone reflects light. Each stone in our collection comes with an independent grading report so you can verify every characteristic before purchasing.
Buying a loose diamond offers several key advantages:
Full transparency — You can inspect the entire stone, including the pavilion and girdle, which are hidden once set in a ring. This makes it easier to assess inclusions and overall quality.
Better value — Loose stones are often more competitively priced than pre-set jewellery, where you are also paying for labour, branding, and design margins.
Complete customisation — Choose your own setting style, metal type (platinum PT950, 18K yellow gold, rose gold, etc.), and design to create a truly one-of-a-kind piece.
Investment potential — GIA-certified loose fancy colour diamonds are widely recognised as tangible assets with strong long-term value retention.
Full transparency — You can inspect the entire stone, including the pavilion and girdle, which are hidden once set in a ring. This makes it easier to assess inclusions and overall quality.
Better value — Loose stones are often more competitively priced than pre-set jewellery, where you are also paying for labour, branding, and design margins.
Complete customisation — Choose your own setting style, metal type (platinum PT950, 18K yellow gold, rose gold, etc.), and design to create a truly one-of-a-kind piece.
Investment potential — GIA-certified loose fancy colour diamonds are widely recognised as tangible assets with strong long-term value retention.
Yes. Every loose yellow diamond in our collection is accompanied by an official grading report from the GIA (Gemological Institute of America) or CGL (Central Gem Laboratory) — two of the most respected gemological laboratories in the world. The certificate details the stone's colour grade, clarity grade, carat weight, cut, polish, symmetry, fluorescence, and more, providing complete and objective verification of its quality and authenticity.
High-quality fancy colour diamonds — particularly those graded Fancy Intense or Fancy Vivid Yellow — have demonstrated strong long-term value retention and are increasingly viewed as a tangible alternative asset. Unlike colourless diamonds, fancy colour diamonds are exceptionally rare: fewer than 1 in 10,000 carats mined qualify as a natural fancy colour stone. Their limited global supply, combined with growing demand from collectors and investors in Asia and beyond, makes certified loose yellow diamonds an attractive store of value. As with any investment, we recommend consulting a financial adviser, but the rarity and beauty of these stones speak for themselves.
The ideal setting depends on your personal style and how you want the colour to appear:
18K Yellow Gold — The most popular choice. The warm tone of the gold harmonises with and amplifies the yellow of the diamond, creating a rich, unified look.
Platinum (PT950) or White Gold — Creates a high-contrast pairing that makes the yellow colour pop dramatically against a cool, bright background.
Rose Gold — A romantic, contemporary option that complements the warmth of the stone with a soft, blush tone.
For setting styles, a classic solitaire prong setting maximises light entry and brilliance, while a halo setting can enhance the perceived size and intensity of the colour. Our specialists are happy to guide you through every option during a private consultation.
18K Yellow Gold — The most popular choice. The warm tone of the gold harmonises with and amplifies the yellow of the diamond, creating a rich, unified look.
Platinum (PT950) or White Gold — Creates a high-contrast pairing that makes the yellow colour pop dramatically against a cool, bright background.
Rose Gold — A romantic, contemporary option that complements the warmth of the stone with a soft, blush tone.
For setting styles, a classic solitaire prong setting maximises light entry and brilliance, while a halo setting can enhance the perceived size and intensity of the colour. Our specialists are happy to guide you through every option during a private consultation.
Yes, and we strongly encourage it. Seeing a yellow diamond under natural light and professional lighting is a completely different experience from viewing it on a screen. At our private Tokyo showroom, one of our specialists will present each stone for you, explain the grading report in detail, and help you compare options side by side. Viewings are by appointment only — please use our contact form to reserve your session.
Absolutely. A loose yellow diamond is the perfect starting point for a bespoke engagement ring, anniversary piece, or any meaningful jewellery. Once you have selected your stone, our team will work closely with you to design and craft a setting that reflects your vision — whether that is a timeless solitaire, an intricate vintage design, or something entirely unique. We handle everything from the initial concept through to the finished piece. To get started, contact us or visit our showroom. You can also explore our ready-to-wear yellow diamond ring collection for inspiration.
Yes. Japan Diamond offers a money-back guarantee on our loose diamonds and jewellery. We believe that purchasing a rare gemstone should be a joyful and confident experience — not a stressful one. Full terms and conditions are available on our Money-Back Guarantee page. If you have any questions before purchasing, please do not hesitate to get in touch.
Prefer a finished piece? See our Yellow Diamond Rings.