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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（カボションカット） 0.196ctルース

Diamond (cabochon cut) 0.196ct loose Sale price¥29,800
ダイヤモンド 0.430ct原石

South African diamond rough stone 0.430ct Sale price¥9,800
イエローダイヤモンド（カボションカット） 0.176ctルース

Yellow Diamond (Cabochon Cut) 0.176ct Loose Sale price¥29,800
フォレストグリーンダイヤモンド（トリートメント） 0.431ctルース(FANCY DARK GRAY GREEN, SI-2)

Forest Green Diamond (Treatment) 0.431ct Loose (FANCY DARK GRAY GREEN, SI-2) Sale price¥35,800
ダイヤモンド 0.330ct原石

South African diamond rough stone 0.330ct Sale price¥5,980
ブラウンダイヤモンド 0.389ctルース

Round Diamond 0.389ct Loose (Cabochon Cut) Sale price¥39,800
ダイヤモンド 0.210ct原石

South African diamond rough stone 0.210ct Sale price¥8,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.107ct原石

South African Diamond Rough (Sawable) 0.107ct Rough Trigon Sale price¥42,800
シルキーダイヤモンド 2.7mm/0.086ctルース

Silky diamond 2.7mm/0.086ct loose Sale price¥14,800
ブラウンダイヤモンド 0.554ctルース (カボションカット,SIクラス相当)

Brown diamond 0.554ct loose (cabochon cut, SI class equivalent) Sale price¥69,800
ピンクダイヤモンド

Pink Diamond 0.075ct Loose (Fancy Purplish PINK, SI2) Sale price¥98,000
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.096ct原石

South African diamond rough (sawable) 0.096ct rough (with trigon) Sale price¥39,800
ダイヤモンド（カボションカット） 0.247ctルース（VS-SIクラス相当）

Diamond (cabochon cut) 0.247ct loose (VS-SI class equivalent) Sale price¥39,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.112ct原石

South African diamond rough (sawable) 0.112ct rough Sale price¥44,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.091ct原石（トライゴン）

South African diamond rough (sawable) 0.091ct rough (trigon) Sale price¥35,800
イエローダイヤモンド（カボションカット） 0.185ctルース

Yellow Diamond (Cabochon Cut) 0.185ct Loose Sale price¥25,800
Salt and pepper diamond & black diamond 13 stone half eternity ring set (2.0mm)

Salt and pepper diamond & black diamond 13 stone half eternity ring set (2.0mm) Sale price¥98,000
ダイヤモンド（カボションカット） 0.233ctルース

Diamond (cabochon cut) 0.233ct loose Sale price¥39,800
Diamond 3.0mm/0.123ct loose stone (D, VS2, octagonal cut)

Diamond 3.0mm/0.123ct loose stone (D, VS2, octagonal cut) Sale price¥28,800
ダイヤモンド（カボションカット） 0.183ctルース

Diamond (cabochon cut) 0.183ct loose Sale price¥24,800
ダイヤモンド（カボションカット） 0.366ctルース

Diamond (cabochon cut) 0.366ct loose Sale price¥59,800
ロシア産イエローダイヤモンド原石（ソーヤブル） 0.306ct原石

Russian Yellow Diamond Rough (Sawable) 0.306ct Rough (Trigon) Sale price¥98,000
ダイヤモンド 0.171ctルース(E, VS2)

Diamond 0.171ct loose stone (E, VS2, radiant cut) Sale price¥35,800
K18YGローズカットダイヤモンド0.171ctリング

K18YG rose cut diamond 0.171ct ring Sale price¥89,800
ダイヤモンド 0.128ctルース（カボションカット,マロンカット）

Diamond 0.128ct loose stone (cabochon cut, maroon cut) Sale price¥39,800
ダイヤモンド原石（ソーヤブル） 0.125ctルース

Russian rough diamond (sawable) 0.125ct loose Sale price¥29,800
イエローダイヤモンド 4mm/0.261ctルース(LIGHT YELLOW, VS-2, VeryGood)（セミオーダーメイドセット）

[Staff Selection] Yellow Diamond 4mm/0.261ct Loose (LIGHT YELLOW, VS-2, Very Good) (Semi-Custom Made Set) Sale price¥59,800
ダイヤモンド 0.534ct原石

Diamond 0.534ct ​​rough stone Sale price¥9,800
ダイヤモンド 0.348ctルース(I, SI1)

Diamond 0.348ct loose (I, SI1) 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 Rose cut diamond 1.2mm x 1 stone (VS-SI class, DH color, melee diamonds) {Multiple purchase discounts available}

Rose cut diamond 1.2mm x 1 stone (VS-SI class, DH color, melee diamonds) {Multiple purchase discounts available}
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 Limited to 40 stones: Salt and Pepper Diamond (2mm, Melee Diamonds) - 1 loose stone. Discounts available for multiple purchases.

Limited to 40 stones: Salt and Pepper Diamond (2mm, Melee Diamonds) - 1 loose stone. Discounts available for multiple purchases.

Sold out Fun Gem Gacha! 💎 Get diamonds (normally 29,800 yen) (D/VS/3EX H&C with Medium Certificate), special cut Oresund and Unloved, and more! (Multiple purchase discounts available)

Fun Gem Gacha! 💎 Get diamonds (normally 29,800 yen) (D/VS/3EX H&C with Medium Certificate), special cut Oresund and Unloved, and more! (Multiple purchase discounts available)

Sold out Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available}

Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available}
Sold out プリンセスカットダイヤモンド 2.0mm ルース（VSクラス相当）

Princess cut diamond 2.0mm loose (equivalent to VS class)《Multiple purchase discount available》

Sold out 《Limited to 15 Stones》Diamond Gacha where you can win a D/VS-1/3.4mm or I/VS-1/3.7mm diamond with a GIA Japan sorting report, normally priced at 29,800 yen 💎《Multiple Purchase Discount Available》

《Limited to 15 Stones》Diamond Gacha where you can win a D/VS-1/3.4mm or I/VS-1/3.7mm diamond with a GIA Japan sorting report, normally priced at 29,800 yen 💎《Multiple Purchase Discount 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 13 stones》Yellow Diamond Gacha: Win a VVS-2/4.3mm stone with a sorting report (regularly 39,800 yen) 💎《Multiple purchase discount available》

《Limited to 13 stones》Yellow Diamond Gacha: Win a VVS-2/4.3mm stone with a sorting report (regularly 39,800 yen) 💎《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 A single loose pink diamond, including a fancy pink diamond, normally priced at 39,800 yen (multiple purchase discounts available)

A single loose pink diamond, including a fancy pink diamond, normally priced at 39,800 yen (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 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》

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.