Rings・ Necklaces・ Earrings・ Bracelets・ Diamonds

Diamond Necklaces

ダイヤモンドネックレス

Browse over 60 natural diamond pendant necklaces, available with GIA, CGL, or GGS certification.

From vivid fancy color diamonds — yellow, pink, and green — to elegant colorless stones, our collection spans round, cushion, oval, and emerald cut pendants in 18K white gold, yellow gold, pink gold, and platinum settings.

Center stone pendants carry GIA or CGL certificates; select multi-stone styles such as flower clusters carry GGS certification. Custom orders welcome.

Colored Diamond Necklaces

  • 18K Cushion Fancy Intense Yellow Diamond Pendant Necklace - 1.25ct

    18K Cushion Fancy Intense Yellow Diamond Pendant Necklace - 1.25ct

    ¥480,000 (Tax incl.)
    NEW
  • PT950/850 Cushion Fancy Yellow Diamond Pendant Necklace - 1.865ct

    PT950/850 Cushion Fancy Yellow Diamond Pendant Necklace - 1.865ct

    ¥490,000 (Tax incl.)
    NEW
  • PT900/18K Fancy Vivid Orange Yellow Cushion-cut Diamond Pendant Necklace - 0.248ct

    PT900/18K Fancy Vivid Orange Yellow Cushion-cut Diamond Pendant Necklace - 0.248ct

    ¥320,000 (Tax incl.)
  • 天然ダイヤモンドネックレス ファンシーインテンスイエロー オーバル SI2 1.374ct 画像

    18K Oval Fancy Intense Yellow Diamond Pendant Necklace - 1.374ct

    ¥890,000 (Tax incl.)
View all

Colorless Diamond Necklaces

  • PT850/950 Colorless Diamond Pendant Pear Necklace - 1.024ct

    PT850/950 Colorless Diamond Pendant Pear Necklace - 1.024ct

    ¥290,000 (Tax incl.)
    NEW
  • 18KPG Flower Design Round Diamond Pendant Necklace - 0.28ct

    18KPG Flower Design Round Diamond Pendant Necklace - 0.28ct

    ¥150,000 (Tax incl.)
    NEW
  • PT950/850 Emerald-cut Colorless Diamond Pendant Necklace - 0.51ct

    PT950/850 Emerald-cut Colorless Diamond Pendant Necklace - 0.51ct

    ¥210,000 (Tax incl.)
    NEW
  • PT950/850 Cushion-cut Near Colorless Diamond Pendant Necklace - 1.646ct

    PT950/850 Cushion-cut Near Colorless Diamond Pendant Necklace - 1.646ct

    ¥390,000 (Tax incl.)
    NEW
View all

How to Choose a Diamond Pendant Necklace

Color Diamond or Colorless Diamond

The first decision when choosing a diamond pendant is whether you want a fancy color diamond or a colorless one. Colorless diamonds — graded D through J — offer bright, white brilliance that works with virtually any outfit or occasion, from everyday wear to formal events. Fancy color diamonds in yellow, pink, and green carry a natural rarity that makes each pendant genuinely unique. Worn as a necklace, fancy color diamonds are particularly striking, the stone sits at the center of the chest where light catches it from multiple angles, allowing the color to express itself fully. Browse our fancy color diamond necklaces and colorless diamond necklaces to compare.

Choosing a Diamond Shape

Diamond shape affects how a pendant sits at the neckline and how it catches light. Round cut is the most brilliant of all shapes and the most versatile — a round solitaire pendant works from the office to a formal dinner without adjustment. Cushion cut has a softer, warmer character that suits fancy color diamonds particularly well, as the larger facets allow the stone's hue to come through with depth and richness. Oval cut creates an elongated silhouette that sits elegantly at the neckline and tends to appear larger than its carat weight suggests. Emerald cut is a step-cut shape with a cooler, more architectural sparkle — the hall-of-mirrors effect is especially striking in colorless stones and suits a modern, minimal aesthetic.

Metal Choice

We offer pendant necklaces in 18K white gold, 18K yellow gold, 18K pink gold, and platinum. For colorless diamonds, white gold and platinum frame the stone most cleanly, letting the diamond's brightness take full focus. Platinum is harder and more durable than white gold and does not need replating over time. For yellow diamonds, both yellow gold and platinum work well — yellow gold creates a warm, unified look while platinum provides a clean contrast that makes the color pop. For pink diamonds, rose gold and platinum both complement the stone's delicate hue. Where possible, matching the pendant metal to any other jewelry worn at the neckline creates a more polished overall look.

Carat Weight, Chain Length, and Budget

Our collection starts from ¥150,000 for delicate multi-stone cluster pendants and extends to well over ¥800,000 for larger fancy color center stones. For everyday pendants, a 0.2 to 0.5ct center stone offers a refined presence without being overstated. For gifts or special occasions, 0.5ct and above creates a more impactful look at the neckline. Chain length also influences how a pendant is perceived — 40cm sits at the collarbone, 45cm sits just below it, and 50cm falls toward the chest. Larger pendants generally suit slightly longer chains. If you need guidance on finding the right combination for your budget, contact us or visit our office in Okachimachi.

Frequently Asked Questions

A diamond pendant refers to the decorative top piece that hangs from a chain, while a diamond necklace refers to the complete piece including both the pendant and the chain. At Weiss, our pendants are sold complete with a chain so they can be worn immediately upon purchase.
Center stone pendants — solitaires, halos, and similar designs — come with GIA or CGL certificates. Select multi-stone styles such as flower clusters carry GGS certification. The certificate type is listed on each individual product page. We recommend checking before purchasing.
Both make excellent pendants for different reasons. Colorless diamonds are versatile and suit any style or occasion, making them a reliable everyday choice. Color diamonds — particularly yellow and pink — are especially striking as pendants because the stone sits at the chest where it catches light from multiple angles, allowing the color to shine fully. Color diamonds are often chosen for special occasions or as meaningful gifts.
A 40cm chain sits at the collarbone, 45cm falls just below it, and 50cm sits toward the chest. For everyday pendants and delicate designs, 40 to 45cm is the most popular range. For larger or more statement pendants, 45 to 50cm tends to give the piece more room to be appreciated. If you visit our office you are welcome to try different lengths in person.
Yes. Our appointment-only office is located in Okachimachi, Tokyo. You are welcome to try on pendants at different chain lengths and compare stones in person with guidance from our specialists. Please book an appointment through our contact page or by phone.
Yes. We can create a completely custom pendant based on your preferred diamond — color, carat weight, shape, and grade — combined with your choice of metal and pendant design. You can also browse our loose diamond collection to select a specific stone. Contact us to begin.
Yes. Many of our pendants are designed with everyday wearability in mind. Simple solitaire and cluster pendants are lightweight and low-profile enough for daily use, pairing easily with casual and professional outfits alike. Color diamond pendants are also popular as everyday pieces — a small yellow or pink diamond at the neckline adds a subtle, distinctive touch to any look.