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.

[Sale starts 10 PM on July 3] 《Limited to 14 stones》Fluorescent diamonds in rare colors such as white, orange, and green《Bulk purchase discount available》 Sale price¥3,980

[Available 7/4 10 PM JST] Diamond 3.0mm/0.100ct Loose Stone (E, VVS-2, VeryGood) Sale price¥22,800

[On Sale July 4th at 10 PM] Diamond 3.8mm/ 0.198ct Loose Stone (D, VVS-2, Very Good) Sale price¥29,800

[On sale July 4th at 10 PM] Diamond 0.229 ct Loose (D, VS2, Flanders Cut) Sale price¥39,800

インターナリーフローレスダイヤモンド（H&C） 5.1mm/0.527ctルース(E, IF, 3Excellent H&C)

[Lottery Sale 0530_06] Internally Flawless Diamond (H&C) 0.527ct Loose Stone (E, IF, 3Excellent H&C) Sale price¥228,000

インターナリーフローレスダイヤモンド 0.272ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA Sale price¥138,000

インターナリーフローレスダイヤモンド 0.217ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA Sale price¥88,000

フローレスダイヤモンド（H&C） 0.290ctルース(D, FL, 3Excellent H&C)

【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab Sale price¥198,000

フローレスダイヤモンド（H&C） 4.2mm/0.280ctルース(D, FL, 3Excellent H&C) GIA&中宝

【Lottery Sale 0620_09】Flawless Diamond (H&C) 4.2mm/0.280ct Loose Stone (D, FL, 3Excellent H&C) GIA&CGL Sale price¥188,000

Diamond (cabochon cut) 0.206ct loose Sale price¥45,800

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) Sale price¥1,580

H&C (Heart & Cupid) Diamond 2.0mm Loose (VS Class, DG Class, 2mm Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥7,980

Rose cut diamond 1.2mm x 1 stone (VS-SI class, DH color, melee diamonds) {Multiple purchase discounts available} Sale price¥2,980

H&C (Hearts & Cupids) Diamond 1.2mm Loose (VS Class, DG Class, Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥3,980

H&C(ハート&キューピッド)ダイヤモンド1.2mmルース - カラッツSTORE

H&C (Hearts & Cupids) Diamond 1.5mm Loose (VS Class, DG Class, Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥4,980

Diamond (Old Mine Cut) 1 Loose Stone {Multiple Purchase Discounts Available} Sale price¥4,980

Diamond loose sorting transition fee Sale price¥3,000

[Option] Laser engraving of characters and symbols Sale price¥5,000

インターナリーフローレスダイヤモンド 0.320ctルース(G, IF, 3Excellent)

[On Sale May 31st at 10 PM] Internally Flawless Diamond 4.4mm/0.320ct Loose (G, IF, 3Excellent) GIA Sale price¥89,800

[On sale June 2 at 10 PM] Loose Diamond 3.7mm/0.197ct (H, VS-1, Good) Sale price¥29,800

[On sale June 4th at 10 PM] Diamond 3.7mm/0.194ct Loose (H, VS-2, Excellent) Sale price¥35,800

[On Sale June 4th, 10 PM JST] Diamond 3.7mm/0.190ct Loose (E, VVS-2, VeryGood) Sale price¥34,800

[Sale from 10 PM on June 4th] Diamond 3.5mm/0.145ct Loose (F, VS-1, VeryGood) Sale price¥26,800

[On sale June 1st at 10 PM] Diamond 3.1mm/0.117ct Loose (D, VVS-2, Very Good) Sale price¥23,800

[Sales begin June 6, 10 PM JST] Diamond 3.7mm/0.192ct Loose (F, VVS-2, VeryGood) Sale price¥39,800

[Sales start June 2nd, 10 PM JST] Diamond 3.7mm/0.184ct Loose Stone (D, VS-1, VeryGood) Sale price¥33,800

[Sales begin June 6th, 10 PM JST] 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）

[On sale 5/26 10 PM] [Colorful] Pt900 Paraiba Tourmaline from Brazil 0.06ct / Diamond 0.18ct Pendant Top (CuO:2.6%, MnO:3.5%) Sale price¥69,800

[On sale May 14 at 10 PM] Colorful WISH UPON A STAR® 3.5mm/0.166ct/F/VS1 Diamond with Certificate Sale price¥39,800

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)

[On sale May 12th, 10 PM JST] Internally Flawless Diamond (H&C) 4.5mm/0.360ct Loose Stone (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)

[Sale on May 12th at 10 PM] 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） 0.230ctルース(D, FL, 3Excellent H&C)

[On sale May 12, 10 PM JST] Flawless Diamond (H&C) 4.0mm/0.230ct Loose Stone (D, FL, 3Excellent H&C) GIA&CGL Sale price¥158,000

フローレスダイヤモンド（H&C） 0.210ctルース(D, FL, 3Excellent H&C)

[On sale May 12, 10 PM JST] Flawless Diamond (H&C) 3.8mm/0.210ct Loose (D, FL, 3Excellent H&C) GIA & Central Gem Lab Sale price¥148,000

[On sale May 23rd at 10 PM] Diamond 3.4mm/0.141ct Loose Stone (E, VVS-2, EXCELLENT, H&C) Sale price¥36,800

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)

[On sale May 3 at 10 PM] Diamond 3.5mm/0.167ct Loose Stone (G, VS-1, Very Good) Sale price¥29,800

[On sale 5/27 10 PM] 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)

[Sale on May 3rd, 10 PM JST] Diamond 3.5mm/0.167ct Loose Stone (D, VVS-2, VeryGood) Sale price¥37,800

[On sale May 27th at 10 PM] Diamond 3.8mm/0.211ct Loose (E, VS-2, Excellent) Sale price¥49,800

[On Sale May 14th, 10 PM] 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)

[On sale May 3rd, 10 PM JST] Loose Diamond 3.8mm/0.207ct (F, VS-1, Excellent) Sale price¥35,800

Diamond 0.042ct loose (VS class equivalent, emerald cut) Sale price¥6,980

【22602549掲載】【カラフリ】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

Diamond 0.402ct Loose (H, VS2, Flanders Cut) Sale price¥79,800

Loose White Diamond 0.108ct (FANCY WHITE, I-1) Sale price¥55,800

Diamond 0.051ct loose (trapeze cut, VS class equivalent) Sale price¥7,980

Diamond 0.777ct loose (butterfly cut) Sale price¥69,800

Diamond 0.244ct Loose Stone (F, VS2, Flanders Cut) Sale price¥39,800

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.