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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 【31500773掲載】ピンクダイヤモンド 0.104ctルース(FANCY LIGHT PURPLISH PINK, I1)

Pink diamond 0.104ct loose (FANCY LIGHT PURPLISH PINK, I1)

Sold out 【31500767掲載】ピンクダイヤモンド 0.088ctルース(FANCY PURPLE PINK , VS2)

FANCY PURPLE PINK 0.088ct loose (FANCY PURPLE PINK, VS2)

Sold out Pt900ローズカットダイヤモンド0.30ct ハーフエタニティリング - KARATZ STORE｜カラッツSTORE

Pt900 rose cut diamond 0.30ct half eternity ring

Sold out K18PGモルガナイト1.54ct リング - KARATZ STORE｜カラッツSTORE

K18PG morganite 1.54ct diamond ring

Sold out アイスブルーダイヤモンド 1.021ctルース(FANCY INTENSE BLUE GREEN, I1) - KARATZ STORE｜カラッツSTORE

Ice blue diamond 1.021ct loose (FANCY INTENSE BLUE GREEN, I1, radiant cut)

Sold out イエローダイヤモンド 0.206ctルース(FANCY DEEP ORANGY YELLOW, SI2) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.206ct loose (FANCY DEEP ORANGY YELLOW, SI2)

Sold out ダイヤモンド 0.082ctルース（トリリアントカット） - KARATZ STORE｜カラッツSTORE

Diamond 0.082ct loose (trilliant cut)

Sold out イエローダイヤモンド 0.201ctルース（ローズカット） - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.201ct loose (rose cut)

Sold out イエローダイヤモンド 0.055ctルース(FANCY DEEP ORANGY YELLOW, I1) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.055ct loose (FANCY DEEP ORANGY YELLOW, I1)

Sold out Pt900/K18PGピンクダイヤモンド0.048ct リング - KARATZ STORE｜カラッツSTORE

Pt900/K18PG pink diamond 0.048ct ring

coming soon [Available at 10 PM on February 6th] Limited Edition 5 Stones: Approximately 3.3mm VS-Class Diamond Gacha (Usually ¥29,800 Value Included / All Stones Come with Central Gem Laboratory Sorting) [Multiple Purchase Discounts Available]

[Available at 10 PM on February 6th] Limited Edition 5 Stones: Approximately 3.3mm VS-Class Diamond Gacha (Usually ¥29,800 Value Included / All Stones Come with Central Gem Laboratory Sorting) [Multiple Purchase Discounts Available] Sale price¥12,800
coming soon 【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 Sale price¥188,000
coming soon [32501845] Pink Diamond 0.139ct Loose (FANCY PURPLISH PINK, I1)

[32501845] Pink Diamond 0.139ct Loose (FANCY PURPLISH PINK, I1) Sale price¥98,000
coming soon [32501844] Brown Diamond 0.561ct Loose Stone (FANCY DARK BROWN, SI2)

[32501844] Brown Diamond 0.561ct Loose Stone (FANCY DARK BROWN, SI2) Sale price¥29,800
coming soon [32501842] Pink Diamond 0.097ct Loose (FANCY PINK, SI2)

[32501842] Pink Diamond 0.097ct Loose (FANCY PINK, SI2) Sale price¥148,000
coming soon [Lottery Sale 0201_11] Zimbabwe Green Diamond Rough (Sawable) 0.402ct Rough with Trigon

[Lottery Sale 0201_11] Zimbabwe Green Diamond Rough (Sawable) 0.402ct Rough with Trigon Sale price¥148,000
coming soon [Lottery Sale 0201_12] Zimbabwe Green Diamond Rough (Sawable) 0.428ct Rough with Trigon

[Lottery Sale 0201_12] Zimbabwe Green Diamond Rough (Sawable) 0.428ct Rough with Trigon Sale price¥158,000
coming soon [Lottery Sale 0123_09] Angola Green Diamond Rough (Sawable) 0.528ct Rough (with Trigon)

[Lottery Sale 0123_09] Angola Green Diamond Rough (Sawable) 0.528ct Rough (with Trigon) Sale price¥198,000
coming soon [Lottery Sale 0123_10] Canadian Green Diamond Rough (Sawable) 0.338ct Rough (with Trigon)

[Lottery Sale 0123_10] Canadian Green Diamond Rough (Sawable) 0.338ct Rough (with Trigon) Sale price¥128,000
Sold out White Diamond 6.2mm/0.988ct Loose (FANCY WHITE, I2)

White Diamond 6.2mm/0.988ct Loose (FANCY WHITE, I2)

coming soon [Lottery Sale 0201_08] 18K Yellow Gold Brazilian Pink Imperial Topaz 0.909ct Diamond Ring by Nikko Kan

[Lottery Sale 0201_08] 18K Yellow Gold Brazilian Pink Imperial Topaz 0.909ct Diamond Ring by Nikko Kan Sale price¥148,000
Sold out ダイヤモンド 0.131ctルース(F, VS-1)

Diamond 0.131ct loose (F, VS-1, octagonal cut)

Sold out ダイヤモンド 0.210ct原石

South African diamond 0.240ct rough stone
Sold out イエローダイヤモンド（カボションカット） 0.324ctルース

Yellow Diamond (Cabochon Cut) 0.324ct Loose
Sold out フローレスダイヤモンド（H&C） 4.2mm/0.276ctルース(D, FL, 3Excellent H&C)

Flawless Diamond (H&C) 4.2mm/0.276ct Loose (D, FL, 3Excellent H&C)

Sold out インターナリーフローレスダイヤモンド（H&C） 0.204ctルース(F, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 0.204ct Loose (F, IF, 3Excellent H&C)
Sold out フローレスダイヤモンド（H&C） 4.0mm/0.224ctルース(D, FL, 3Excellent H&C) GIA&中宝

[On sale from 10pm on 5/6] Flawless Diamond (H&C) 4.0mm/0.224ct Loose (D, FL, 3Excellent H&C) GIA & Chuho
Sold out Diamond 3.2mm/0.129ct loose (F, SI-1, EXCELLENT)

Diamond 3.2mm/0.129ct loose (F, SI-1, EXCELLENT)
Sold out ダイヤモンド 0.215ctルース（ローズカット）

Diamond 0.215ct loose (rose cut)
Sold out アイスブルーダイヤモンド 3.0mm/0.090ctルース（Undetermined） GIA

Ice Blue Diamond 3.0mm/0.090ct Loose (Undetermined) GIA

Sold out ブラウンダイヤモンド 0.169ctルース

Brown Diamond 0.169ct Loose
Sold out Pt950スリランカ産パープルスピネル 0.29ct・ダイヤモンドリング

Pt950 Sri Lankan purple spinel 0.29ct diamond ring
Sold out ダイヤモンド 2.5mm/0.057ctルース（VSクラス相当,ハートシェイプ）

Diamond 2.5mm/0.057ct loose stone (VS class equivalent, heart shape)
Sold out ロシア産ダイヤモンド原石（ソーヤブル） 0.618ct原石

Russian diamond rough (sawable) 0.618ct 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） 0.525ct原石

Angola Green Diamond Rough (Sawable) 0.525ct Rough
Sold out 【32501764掲載】ラボグロウンダイヤモンド（合成ダイヤモンド） 0.730ctルース(D, IF, IDEAL)

Lab-grown Diamond (Synthetic Diamond) 0.730ct Loose (D, IF, IDEAL)

Sold out カメレオンダイヤモンド 0.110ctルース(FANCY BROWNISH GREENISH YELLOW, SI2)

Chameleon Diamond 3mm/0.110ct Loose (FANCY BROWNISH GREENISH YELLOW, SI2)
Sold out ロンドンブルーダイヤモンド（トリートメント）

London Blue Diamond (Treatment) 0.202ct Loose (FANCY DEEP GREEN BLUE, VS2)

Sold out Pt950ダイヤモンド（カボションカット）0.131ct リング

Pt950 Diamond (Cabochon Cut) 0.131ct Ring

Sold out インターナリーフローレスダイヤモンド 4mm/0.240ctルース(E, IF) GIA

Internally Flawless Diamond 4mm/0.240ct Loose (E, IF) GIA

Sold out ダイヤモンド 0.200ctルース(E, IF)

Internally Flawless Diamond 3.8mm/0.200ct Loose (E, IF) GIA

Sold out ダイヤモンド原石（ソーヤブル） 0.416ct原石（トライゴン）

Diamond rough (sawable) 0.416ct rough (trigon)
Sold out 南アフリカ産グリーンダイヤモンド原石（ソーヤブル） 0.233ctルース

Green diamond rough from South Africa (sawable) 0.233ct loose

Sold out 南アフリカ産グリーンダイヤモンド原石（メイカブル） 0.212ctルース

South African green diamond rough (makeable) 0.212ct loose

Sold out グリーンダイヤモンド原石（ソーヤブル） 0.666ctルース

Green diamond rough stone (sawable) 0.666ct rough stone

Sold out マクルダイヤモンド 0.545ct原石（トライゴン有り）

Muckle Diamond 0.545ct rough stone (with trigon)

Sold out ブラックダイヤモンド 0.316ctルース

Black diamond 0.316ct loose

Sold out グレーダイヤモンド 0.159ctルース(FANCY GRAY, SI-2)

Gray diamond 0.159ct loose (FANCY GRAY, SI-2)

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.