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colorless diamond

Colorless diamonds are a classic engagement ring.
It shines strongly in the light and has an exceptional beauty.
Diamonds are usually said to have a pale yellow or brown tinge, but the closer they are to colorless, the more valuable they are.
Evaluations are mainly based on global value standards called the 4Cs.
Diamond is the birthstone for April.

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ダイヤモンド 0.145ctルース(F, VS-1, VeryGood)

Diamond 3.5mm/0.145ct Loose (F, VS-1, VeryGood) Sale price¥26,800
ダイヤモンド 0.117ctルース(D, VVS-2, VeryGood)

Loose diamond 3.1mm/0.117ct (D, VVS-2, VeryGood) Sale price¥23,800
ダイヤモンド 0.192ctルース(F, VVS-2, VeryGood)

Diamond 3.7mm/0.192ct Loose (F, VVS-2, VeryGood) Sale price¥39,800
ダイヤモンド 0.184ctルース(D, VS-1, VeryGood)

Diamond 3.7mm/0.184ct Loose (D, VS-1, VeryGood) Sale price¥33,800
ダイヤモンド 0.172ctルース(G, VS-1)

Diamond 3.3mm/0.172ct Loose (G, VS-1, Flanders Cut) Sale price¥45,800
Pt900 ブラジル産パライバトルマリン 0.06ct ペンダント（ネックレス）

[Colorful] Pt900 Paraiba Tourmaline 0.06ct from Brazil and Diamond 0.18ct Pendant Top (CuO:2.6%, MnO:3.5%) Sale price¥69,800
インターナリーフローレスダイヤモンド（H&C） 0.360ctルース(D, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 4.5mm/0.360ct Loose (D, IF, 3Excellent H&C) GIA & CBT Sale price¥188,000
インターナリーフローレスダイヤモンド 0.300ctルース(F, IF, 3Excellent)

Internally Flawless Diamond 4.3mm/0.300ct Loose (F, IF, 3Excellent) GIA Sale price¥98,000
フローレスダイヤモンド（H&C） 0.210ctルース(D, FL, 3Excellent H&C)

Flawless Diamond (H&C) 3.8mm/0.210ct Loose (D, FL, 3Excellent H&C) GIA & Central Gem Lab Sale price¥148,000
Diamond 3.7mm/0.318ct Loose (F, SI-1, Princess Cut)

Diamond 3.7mm/0.318ct Loose (F, SI-1, Princess Cut) Sale price¥49,800
【32501899掲載】ダイヤモンド 0.167ctルース(G, VS-1, VeryGood)

Loose diamond 3.5mm/0.167ct (G, VS-1, VeryGood) Sale price¥29,800
ダイヤモンド 0.197ctルース(E, VVS-1, VeryGood)

Diamond 3.8mm/0.197ct Loose (E, VVS-1, VeryGood) Sale price¥39,800
【32501896掲載】ダイヤモンド 0.167ctルース(D, VVS-2, VeryGood)

Diamond 3.5mm/0.167ct Loose (D, VVS-2, VeryGood) Sale price¥37,800
ダイヤモンド 0.211ctルース(E, VS-2, Excellent)

Diamond 3.8mm/0.211ct Loose Stone (E, VS-2, Excellent) Sale price¥49,800
ダイヤモンド 0.216ctルース(G, VS-1, Excellent)

Diamond 3.8mm/0.216ct Loose (G, VS-1, Excellent) Sale price¥49,800
【32501891掲載】ダイヤモンド 0.207ctルース(F, VS-1, Excellent)

Diamond 3.8mm/0.207ct Loose (F, VS-1, Excellent) Sale price¥35,800
ダイヤモンド 0.042ctルース

Diamond 0.042ct loose (VS class equivalent, emerald cut) Sale price¥6,980
K18WG 血赤珊瑚 0.19ct ブローチ

[Colorful] K18WG Blood Coral and Diamond (0.19ct) Brooch with certificate Sale price¥398,000
ダイヤモンド 0.402ctルース(H, VS2)

Diamond 0.402ct Loose (H, VS2, Flanders Cut) Sale price¥79,800
ダイヤモンド 0.051ctルース

Diamond 0.051ct loose (trapeze cut, VS class equivalent) Sale price¥7,980
【32501847掲載】ダイヤモンド 0.244ctルース(F, VS2)

Diamond 0.244ct Loose Stone (F, VS2, Flanders Cut) Sale price¥39,800
ダイヤモンド 0.052ctルース（トラペーズカット,VSクラス相当）

Diamond 0.052ct loose (trapeze cut, VS class equivalent) Sale price¥6,980
ダイヤモンド 0.061ctルース（トラペーズカット,VSクラス相当）

Diamond 0.061ct loose (trapeze cut, VS class equivalent) Sale price¥7,980
ダイヤモンド 0.042ctルース（トラペーズカット,VSクラス相当）

Diamond 0.042ct loose (trapeze cut, VS class equivalent) Sale price¥6,980
ダイヤモンド 0.039ctルース（トラペーズカット,VSクラス相当）

Diamond 0.039ct loose (trapeze cut, equivalent to VS class) Sale price¥5,980
ダイヤモンド 0.200ctルース(G, VVS2,ラディアントカット)

0.200ct loose diamond (G, VVS2, radiant cut) Sale price¥29,800
ダイヤモンド 3.2mm/0.132ctルース(G, VS-2, EXCELLENT)

Diamond 3.2mm/0.132ct Loose (G, VS-2, EXCELLENT) Sale price¥29,800
ダイヤモンド 0.618ctルース(I, I1,ツリーカット)

Diamond 0.618ct loose (I, I1, tree cut) Sale price¥128,000
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
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（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
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 0.348ctルース(I, SI1)

Diamond 0.348ct loose (I, SI1) Sale price¥59,800
Sold out H&C（ハート&キューピッド）専用スコープ（ダイヤモンド 専用スコープ) - カラッツSTORE

[Jeweler's Tools] H&C (Heart & Cupid) Special Scope (Diamond Special Scope)

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 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 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 [On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"
Sold out インターナリーフローレスダイヤモンド 0.340ctルース(D, IF,マーキースカット) GIA

[Deadline: Sat, Oct 3, 10:00 AM: Lottery Sale ①_06] Internally Flawless Diamond 0.340ct Loose Stone (D, IF, Marquise Cut) GIA
Sold out [Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》

[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》
Sold out [Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》

[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》
Sold out [Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》

[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》
Sold out Pt900 ブラジル産アレキサンドライト 0.15 0.14ct ダイヤモンド0.14 0.12ctピアス鑑別書

[Item 22602845] Pt900 Brazilian Alexandrite 0.15/0.14ct & Diamond 0.14/0.12ct Earrings with Appraisal Report

coming soon K18 コロンビア産エメラルド 0.17 0.18ct ダイヤモンド　D0.09ct D0.09ctピアス鑑別書

[Item No. 22602833] K18 Colombian Emerald 0.17ct/0.18ct & Diamond 0.09ct/0.09ct Earrings (with Appraisal Report) Sale price¥98,000
Sold out K18 オーロラ天女 アコヤ真珠（アコヤパール） ダイヤモンド0.02ct ブローチ 真科研

[Item No. 22602818] [Colorfully] 18K Akoya Pearl and 0.02ct Diamond Brooch with Certificate of Authenticity

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.