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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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ダイヤモンド原石（メイカブル） 0.185ctルース（VS-SI）

Rough diamond (makeable) 0.185ct loose (VS-SI) Sale price¥22,800
ダイヤモンド原石（メイカブル） 0.345ctルース（VS-SI相当）

Rough diamond (makeable) 0.345ct loose (VS-SI equivalent) Sale price¥34,800
ピンクダイヤモンド 0.191ctルース(VERY LIGHT ORANGY PINK, SI2)

Pink diamond 0.191ct loose (VERY LIGHT ORANGY PINK, SI2) Sale price¥59,800
イエローダイヤモンド 0.190ctルース(FANCY DEEP ORANGY YELLOW, SI2) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.190ct loose (FANCY DEEP ORANGY YELLOW, SI2) Sale price¥39,800
Sold out Diamond 2mm (VS class, DG color, round cut, melee diamond 2.0mm) 1 loose stone {Multiple purchase discounts available}

Diamond 2mm (VS class, DG color, round cut, melee diamond 2.0mm) 1 loose stone {Multiple purchase discounts available}
Sold out 「決定版 アンカットダイヤモンド」サイン入り初版本 ＆ダイヤモンド原石（グリーン蛍光）2点セット

"Definitive Uncut Diamond" by Kyoichi Suwa, signed first edition & 2-piece set of diamonds (hexagonal cut)

Sold out Pink Diamond Gacha! 💎 Fancy Light Pink Diamond 0.117ct (Certified) Includes One UV-Resistant Pink Diamond (Multiple Purchase Discounts Available)

Pink Diamond Gacha! 💎 Fancy Light Pink Diamond 0.117ct (Certified) Includes One UV-Resistant Pink Diamond (Multiple Purchase Discounts Available)

Sold out Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Sold out Limited to 10 stones: 1 London blue diamond loose (VS-SI class equivalent, 1.8mm) Multiple purchase discounts available

Limited to 10 stones: 1 London blue diamond loose (VS-SI class equivalent, 1.8mm) Multiple purchase discounts available
Sold out 《残り4石》ジェムガチャ💎ジンバブエ産ソーヤブルダイヤモンド1石（正八面体,VS~SIクラス相当） - カラッツSTORE

Gem Gacha💎1 Zimbabwe sawable diamond (regular octahedron, VS~SI class equivalent)

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 Limited to 9 stones Gem gacha💎 April birthstone gacha: A gacha where you can win a fan-cut diamond with AGT sorting or a morganite. Multiple purchase discounts available.

Limited to 9 stones Gem gacha💎 April birthstone gacha: A gacha where you can win a fan-cut diamond with AGT sorting or a morganite. Multiple purchase discounts 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 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 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 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 K18YG カメレオンダイヤモンド 0.142ct リング

Lottery Sale 10 [Reserved for Winner] [Published on 22602468] 18K Yellow Gold Chameleon Diamond 3.2mm/0.142ct Ring (SI-2, Fancy Brownish Greenish Yellow)

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)

[Available at 10 PM on August 12th] 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)

[On Sale at 10 PM on August 12th] Purple Diamond 0.041ct Loose (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)

[Available at 10 PM on August 3rd] 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 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 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 Water Play 13 Stone Set (Santa Maria Aquamarine, Sea Blue Chalcedony, Blue Zircon, Diamond, etc.) Half Eternity Ring Set (2.0mm)

Water Play 13 Stone Set (Santa Maria Aquamarine, Sea Blue Chalcedony, Blue Zircon, Diamond, etc.) Half Eternity Ring Set (2.0mm)
Sold out 【12554800掲載】アンゴラ産グリーンダイヤモンド原石（ソーヤブル） 0.524ct原石

Angola Green Diamond Rough (Sawable) 0.524ct Rough (Trigon)

Sold out アンゴラ産グリーンダイヤモンド原石（ソーヤブル） 0.491ct原石（トライゴン）

Angola Green Diamond Rough (Sawable) 0.491ct Rough (Trigon)
Sold out ロシア産ダイヤモンド原石（ソーヤブル） 0.509ct原石

Russian diamond rough (sawable) 0.509ct rough (trigon)
Sold out Internally Flawless Diamond 3.7mm/0.200ct Loose (E, IF, 3Excellent H&C) GIA & Chuho

Internally Flawless Diamond 3.7mm/0.200ct Loose (E, IF, 3Excellent H&C) GIA & Chuho
Sold out ダイヤモンド原石（ソーヤブル） 0.610ct原石（トライゴン）

Diamond rough (sawable) 0.610ct rough (trigon)
Sold out ダイヤモンド原石（ソーヤブル） 0.597ct原石

Diamond rough (sawable) 0.597ct rough (trigon)
Sold out イエローダイヤモンド 3mm/0.111ctルース(FANCY VIVID ORANGY YELLOW, SI-2)

Yellow Diamond 3mm/0.111ct Loose (FANCY VIVID ORANGY YELLOW, SI-2)

Sold out ダイヤモンド 0.126ctルース(F, VS-1)

Diamond 3mm/0.126ct loose (F, VS-1, octagonal cut)

Sold out マクルダイヤモンド（トライゴン有） 0.149ctルース

Muckle Diamond (with Trigon) 0.149ct loose

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.