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diamond

Diamond is the birthstone of April. This gemstone is sometimes called the king of gemstones. It is said to be the hardest gemstone on earth, and its strong shine is exceptionally beautiful. Colorless is the most common, but it comes in a variety of shades including yellow, pink, blue, orange, and green.

Karatz GemMagazine
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Sold out [On Sale 3/1 at 10 PM] Loose pink diamond, including a fancy pink diamond, normally priced at 39,800 yen. Discounts available for multiple purchases.

[On Sale 3/1 at 10 PM] Loose pink diamond, including a fancy pink diamond, normally priced at 39,800 yen. Discounts available for multiple purchases.

Sold out [Available at 10 PM on January 10th] Limited Edition Pink Diamond Gacha! 13 Diamonds 💎 Includes Fancy Colors and Princess Cuts, Normally ¥49,800. Discounts available for multiple purchases.

[Available at 10 PM on January 10th] Limited Edition Pink Diamond Gacha! 13 Diamonds 💎 Includes Fancy Colors and Princess Cuts, Normally ¥49,800. Discounts available for multiple purchases.
Sold out Diamond gacha featuring a 0.072ct FANCY DEEP pink diamond, normally priced at 70,000 yen, and ice blue diamonds equivalent to VS class. (Multiple purchase discounts available)

Diamond gacha featuring a 0.072ct FANCY DEEP pink diamond, normally priced at 70,000 yen, and ice blue diamonds equivalent to VS class. (Multiple purchase discounts available)
Sold out Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]

Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]
Sold out Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Light Pink) 1 stone loose (multiple purchase discount available)

Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Light Pink) 1 stone loose (multiple purchase discount available)
Sold out Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Intense Pink) 1 stone loose (multiple purchase discount available)

Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Intense Pink) 1 stone loose (multiple purchase discount available)
Sold out Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Vivid Pink) 1 stone loose (multiple purchase discount available)

Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Vivid Pink) 1 stone loose (multiple purchase discount available)
Sold out Diamond gacha💎Fancy cut brown diamonds and FancyDarkBrown diamonds (with medium treasure chest)《Multiple purchase discount available》

Diamond gacha💎Fancy cut brown diamonds and FancyDarkBrown diamonds (with medium treasure chest)《Multiple purchase discount available》

Sold out 1 rose cut diamond (VS-SI class equivalent, 3.0mm)《Multiple purchase discount available》

1 rose cut diamond (VS-SI class equivalent, 3.0mm)《Multiple purchase discount available》

Sold out Gem Gacha💎1 special fluorescent diamond (VS-SI class equivalent, 2.0mm)

Gem Gacha💎1 special fluorescent diamond (VS-SI class equivalent, 2.0mm)

Sold out [Available at 10 PM on February 6th] Approximately 3.3mm VS-Class Diamond Gacha (Regularly worth ¥29,800 / Includes Central Gem Laboratory sorting for all stones) [Multiple purchase discounts available]

[Available at 10 PM on February 6th] Approximately 3.3mm VS-Class Diamond Gacha (Regularly worth ¥29,800 / Includes Central Gem Laboratory sorting for all stones) [Multiple purchase discounts available]
Sold out [On sale 1/9 at 10 PM] Diamond Gacha including VVS-1/H&C sorting (multiple purchase discounts available)

[On sale 1/9 at 10 PM] Diamond Gacha including VVS-1/H&C sorting (multiple purchase discounts available)
Sold out Limited to 9 stones: 1 London Blue Diamond Loose (VS-SI class equivalent, 2.0mm) Multiple purchase discounts available

Limited to 9 stones: 1 London Blue Diamond Loose (VS-SI class equivalent, 2.0mm) Multiple purchase discounts available
Sold out Limited to 11 stones: Diamond gacha including VVS/4mm, VS/3mm, etc. worth ¥40,000. Discounts available for multiple purchases.

Limited to 11 stones: Diamond gacha including VVS/4mm, VS/3mm, etc. worth ¥40,000. Discounts available for multiple purchases.
Sold out Limited Edition of 10 Diamonds, 3.2mm F/VVS-1/Excellent (H&C) Diamond Gacha Set (Multiple Purchase Discounts Available)

Limited Edition of 10 Diamonds, 3.2mm F/VVS-1/Excellent (H&C) Diamond Gacha Set (Multiple Purchase Discounts Available)
Sold out Pink diamond 0.070ct loose (FANCY INTENSE PURPLE PINK, I1)

Pink diamond 0.070ct loose (FANCY INTENSE PURPLE PINK, I1)
Sold out 【32501846掲載】ダイヤモンド 0.290ctルース(J, VS1)

0.290ct loose diamond (J, VS1, Ashoka cut)

Sold out 0.084ct loose green diamond (FANCY GRAY GREEN, I-1)

0.084ct loose green diamond (FANCY GRAY GREEN, I-1)

Sold out 【12552511掲載】ピンクダイヤモンド 0.296ctルース

[On Sale at 10 PM on 2/6] 0.296ct Pink Diamond Loose (Cabochon Cut) with Certificate of Authenticity
Sold out [On sale from 10 PM on February 7th] Pink Diamond 0.139ct Loose (FANCY PURPLISH PINK, I1)

[On sale from 10 PM on February 7th] Pink Diamond 0.139ct Loose (FANCY PURPLISH PINK, I1)
Sold out 南アフリカ産ダイヤモンド（メイカブル） 0.193ct原石

South African yellow diamond (makeable) 0.193ct rough stone

Sold out 18K Yellow Gold American Peridot 0.339ct Diamond Ring

18K Yellow Gold American Peridot 0.339ct Diamond Ring

Sold out ダイヤモンド 0.096ctルース(D, SI1)

Diamond 0.096ct loose (D, SI1, octagonal cut)
Sold out ダイヤモンド 0.126ctルース(F, VS2)

Diamond 0.126ct loose (F, VS2, octagonal cut)
Sold out [On Sale at 10 PM on January 12th] 0.245ct Rough Diamond (with Trigon)

[On Sale at 10 PM on January 12th] 0.245ct Rough Diamond (with Trigon)
Sold out インターナリーフローレスダイヤモンド（H&C） 4.45mm/0.305ctルース(F, IF, 3Excellent H&C) GIA&中宝

[Sale Date: 12/5 10 PM] Internally Flawless Diamond (H&C) 4.45mm/0.305ct Loose (F, IF, 3 Excellent H&C)
Sold out レッドブラウンダイヤモンド（トリートメント） 3.4mm/0.169ctルース(FANCY RED BROWN, VS2)

Treated red-brown diamond, 3.4mm/0.169ct loose (FANCY RED BROWN, VS2)
Sold out ブルーダイヤモンド 2.3mm/0.056ctルース(LIGHT GREEN BLUE, SI-1)

Blue Diamond 2.3mm/0.056ct Loose (Light Green Blue, SI-1)

Sold out ブラウンダイヤモンド 3.2mm/0.132ctルース（VSクラス相当）

Brown diamond 0.132ct loose

Sold out Pt900 Ice Blue Diamond 0.333ct 0.333ct Akoya Pearl 8.0mm Earrings

Pt900 Ice Blue Diamond 0.333ct 0.333ct Akoya Pearl 8.0mm Earrings
Sold out ラボグロウンダイヤモンド（合成ダイヤモンド） 0.290ctルース(FANCY VIVID PINK, VS-2)

Lab-grown Diamond (Synthetic Diamond) 0.290ct Loose (FANCY VIVID PINK, VS-2)

Sold out インターナリーダイヤモンド 0.25ルース(E, IF, 3Excellent) GIA

Internal Diamond 4.1mm/0.250ct Loose (F, IF, 3 Excellent) GIA
Sold out K18YG カメレオンダイヤモンド 0.142ct リング

18K Yellow Gold Chameleon Diamond 3.2mm/0.142ct Ring (SI-2, Fancy Brownish Greenish Yellow)

Sold out パープルダイヤモンド（トリートメント） 2.6mm/0.088ctルース（バイカラー蛍光）

Purple Diamond (Treated) 2.6mm/0.088ct Loose (Bicolor Fluorescent)
Sold out ダイヤモンド（H&C） 3.8mm/0.208ctルース(G, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 3.8mm/0.208ct Loose Stone (G, IF, 3 Excellent H&C)

Sold out イエローダイヤモンド 0.165ctルース(FANCY VIVID ORANGY YELLOW, SI-2)

Yellow Diamond 3.4mm/0.165ct Loose (Fancy Vivid Orangy Yellow, SI-2)
Sold out 【32501458掲載】レッドダイヤモンド（トリートメント） 0.065ctルース(FANCY PURPLISH RED, VS2)

[Posted 32501458] Red Diamond (Treatment) 0.065ct Loose (FANCY PURPLISH RED, VS2)

Sold out イエローダイヤモンド（トリートメント） 0.247ctルース(FANCY INTENSE GREENISH YELLOW, SI2)

Yellow Diamond (Treatment) 0.247ct Loose (FANCY INTENSE GREENISH YELLOW, SI2)
Sold out イエローダイヤモンド 0.102ctルース（TLC／VSクラス相当）

Yellow diamond 2.8mm/0.102ct loose (TLC/VS class equivalent)

Sold out カナリーイエローダイヤモンド（トリートメント） 0.029ctルース

[Posted in 12530233] Canary Yellow Diamond (Treatment) 0.029ct Loose
Sold out ピンクダイヤモンド 3.0mm/0.110ctルース(FANCY INTENSE PINK, SI2)

Pink Diamond 3.0mm/0.110ct Loose (FANCY INTENSE PINK, SI2)

Sold out パープルダイヤモンド 0.041ctルース(FANCY PINK PURPLE, SI2)

0.041ct loose purple diamond (FANCY PINK PURPLE, SI2)

Sold out ピンクダイヤモンド 0.030ctルース(FANCY LIGHT PURPLE PINK, SI1)

Pink Diamond 0.030ct Loose (FANCY LIGHT PURPLE PINK, SI1)
Sold out ピンクダイヤモンド 0.049ctルース(FANCY INTENSE PURPLE PINK, VS2)

0.049ct Pink Diamond Loose (Fancy Intense Purple Pink, VS2)

Sold out ピンクダイヤモンド 0.039ctルース(LIGHT PINK, VS2)

Pink Diamond 2.1mm/0.039ct Loose (Light Pink, VS2)
Sold out ファンシーインテンスイエローダイヤモンド 0.126ctルース(FANCY INTENSE YELLOW, SI-1)

FANCY INTENSE YELLOW, SI-1
Sold out ダイヤモンド（カボションカット） 0.401ctルース

Diamond (cabochon cut) 0.401ct loose (star depending on angle)
Sold out ダイヤモンド 0.131ctルース(G, VS-1, EXCELLENT ハート＆キューピッド)

Diamond 3.3mm/0.131ct Loose (G, VS-1, EXCELLENT Heart & Cupid)

KARATZ Custom Made

Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.

KARATZ・Five Commitments

So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.

KARATZ's Initiatives and Social Contributions

We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.

KARATZ Books

These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.

jeweler's tools

For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.