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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 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 Fancy or Fancy Intense color pink diamond melee single loose stone (1.0mm, round cut) (Multiple purchase discounts available)

Fancy or Fancy Intense color pink diamond melee single loose stone (1.0mm, round cut) (Multiple purchase discounts 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 [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 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 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 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 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)
Sold out シエラレオネ産イエローダイヤモンド原石（ソーヤブル） 0.102ct原石

Sierra Leone Yellow Diamond Rough (Sawable) 0.102ct Rough
Sold out ミントグリーンダイヤモンド（トリートメント） 0.172ctルース（VSクラス相当,テーパードカット）

Mint green diamond (treatment) 0.172ct loose (VS class equivalent, tapered cut)
Sold out Fancy Deep Yellowish Green Diamond (Treatment) 1.570ct Loose (FANCY DEEP YELLOWISH GREEN, VS2) GIA

Fancy Deep Yellowish Green Diamond (Treatment) 1.570ct Loose (FANCY DEEP YELLOWISH GREEN, VS2) GIA
Sold out グレーダイヤモンド 0.214ctルース

Gray Diamond 0.214ct Loose
Sold out ダイヤモンド 0.123ctルース (バイカラー)

Diamond 0.123ct loose (bicolor)
Sold out ダイヤモンド 0.088ctルース (バイカラー)

Diamond 0.088ct loose (bicolor)
Sold out イエローダイヤモンド 0.390ctルース(UNDER S(LIGHT YELLOW), VVS1, 3Excellent H&C)

Yellow Diamond 4.7mm/0.390ct Loose (LIGHT YELLOW, VVS1, 3Excellent H&C)
Sold out 南アフリカ産ダイヤモンド原石（ソーヤブル） 0.102ct原石

South African diamond rough (sawable) 0.102ct rough (with trigon)

Sold out ダイヤモンド原石（ソーヤブル） 0.101ct原石

Diamond rough (sawable) 0.101ct rough (with trigon)
Sold out 【カラフリ】K18WGブラウンダイヤモンドリング

[Colorful] K18WG Brown Diamond Ring
Sold out ジンバブエ産スライストラピッチェダイヤモンド 0.206ctルース

Zimbabwe sliced ​​trapiche diamond 0.206ct loose
Sold out ブラウンダイヤモンド（シュガーローフカット） 0.278ctルース

Brown diamond (sugarloaf cut) 0.278ct loose (SI class equivalent)

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.