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.

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

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

[Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire 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

"Limited to 14 stones" Fluorescent diamonds in rare colors such as white, orange, and green "Bulk purchase discounts available" Sale price¥3,980

Diamond loose sorting transition fee Sale price¥3,000

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

[10/3 (Sat) 10:00 AM Deadline: Lottery Sale ①_03] Diamond (H&C) 4.5mm/0.353ct Loose Stone (E, VS-2, 3Excellent H&C) Includes CGL Report & Sarine Light Report Sale price¥79,800

[10/3 (Sat) 10:00 AM Deadline: Lottery Sale ①_04] Diamond (H&C) 4.5mm/0.345ct Loose Stone (G, VS-2, 3Excellent H&C) CGL Certified Sale price¥69,800

ダイヤモンド 3.7mm/0.200ctルース(E, VS-2, 3Excellent) GIA

[Deadline: Sat, Oct 3, 10:00 AM: Lottery Sale ①_01] Diamond 3.7mm/0.200ct Loose Stone (E, VS-2, 3Excellent) GIA Sale price¥35,800

Diamond (cabochon cut) 0.183ct loose Sale price¥24,800

【11/5 22時販売】【カラフリ】Pt850 ダイヤモンド 1.0ct ブレスレット鑑別書 Sale price¥128,000

[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》 Sale price¥48,000

[Item 22602846] K18 Ruby 0.03/0.03ct & Diamond 0.04/0.04ct Earrings with Appraisal Report Sale price¥39,800

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

[Deadline: Sat, Oct 3, 10 AM: Lottery Sale ①_07] Internally Flawless Diamond (H&C) 0.320ct Loose Stone (D, IF, 3Excellent H&C) GIA & CGL Certified Sale price¥148,000

[10/3 (Sat) 10:00 AM Deadline: Lottery Sale ①_02] Diamond (H&C) 4.3mm/0.318ct Loose Stone (H, SI-1, 3Excellent H&C) with CGL Certificate & Sarine Light Report Sale price¥45,800

インターナリーフローレスダイヤモンド（H&C） 4.2mm/0.280ctルース(D, IF, 3Excellent H&C) GIA&中宝

[Lottery Sale_12] [For Winners Only] [Ref: 32501798] Internally Flawless Diamond (H&C) 4.2mm/0.280ct Loose Stone (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（H&C） 4.7mm/0.413ctルース(D, IF, 3Excellent H&C)　GIA

【10/5 10:00 PM Release】Internally Flawless Diamond (H&C) 4.7mm / 0.413ct Loose Stone (D, IF, 3Excellent H&C) GIA & CGL Certified Sale price¥178,000

インターナリーフローレスダイヤモンド 3.7mm/0.238ctルース(E, IF)

[Deadline: Wed, 9/22, 10:00 AM: Lottery Sale_11] Internally Flawless Diamond 3.7mm/0.238ct Loose Stone (E, IF) Sale price¥59,800

Diamond 0.128ct loose stone (cabochon cut, maroon cut) Sale price¥45,800

インターナリーフローレスダイヤモンド（H&C） 4.0mm/0.245ctルース(D, IF, 3Excellent H&C)

【9/6 10:00 PM Sale】Internally Flawless Diamond (H&C) 4.0mm/0.245ct Loose (D, IF, 3Excellent H&C) Sale price¥128,000

K18WG オーロラ天女・アコヤ真珠（アコヤパール）ダイヤモンドブローチ真科研鑑

[Available 9/5 at 10 PM] 18K White Gold Aurora Tennyo Akoya Pearl and Diamond Brooch, with Pearl Science Laboratory Certificate Sale price¥98,000

インターナリーフローレスダイヤモンド 0.300ctルース(D, IF) GIA

[Lottery Sale ①_202608_12] Internally Flawless Diamond 0.300 ct Loose (D, IF) GIA Sale price¥118,000

[Published 22602698] [Karafuri] K18 Ruby 6.74ct Ring Diamond 0.91ct with identification report Sale price¥228,000

オレンジダイヤモンド 0.348ctルース(FANCY VIVID YELLOW ORANGE, VS-1)

[Featured in 32501971] Orange Diamond 0.348ct Loose Stone (FANCY VIVID YELLOW ORANGE, VS-1) Sale price¥128,000

ダイヤモンド 4.45mm/0.324ctルース(D, VVS1, 3Excellent) GIA&中宝

[Lottery Sale 1_202608_11] Diamond 4.45mm/0.324ct Loose (D, VVS1, 3Excellent) GIA & CBT Sale price¥98,000

ダイヤモンド 4.42mm/0.330ctルース(E, VS1, 3Excellent) GIA

【Lottery Sale ①_202608_10】Diamond 4.42mm/0.330ct Loose (E, VS1, 3Excellent) GIA Sale price¥98,000

インターナリーフローレスダイヤモンド（H&C） 3.9mm/0.215ctルース(E, IF, 3Excellent H&C) GIA

[Lottery Sale ①_202608_09] Internally Flawless Diamond (H&C) 3.9mm/0.215ct Loose (E, IF, 3Excellent H&C) GIA Sale price¥75,800

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

diamond Sale price¥45,800

インターナリーフローレスダイヤモンド（H&C） 3.8mm/0.206ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0731_12] Internally Flawless Diamond (H&C) 0.206ct Loose (D, IF, 3Excellent H&C) Sale price¥89,800

[#202607 Akihabara Pop-up currently out of office] [Sale starts August 19th, 10 PM JST] Slice Trapiche Diamond 0.228ct Loose Sale price¥18,800

ダイヤモンド 3.0mm/0.105ctルース(F, VVS2, VeryGood)

Diamond 3.0mm / 0.105ct Loose (F, VVS-2, Very Good) Sale price¥19,800

ダイヤモンド（ハート＆キューピッド）3.0mm/0.226ctルース(G, VVS-1, 3Excellent H&C)

Diamond (Hearts & Arrows) 3.0mm/0.226ct Loose (G, VVS-1, 3Excellent H&C) Sale price¥46,800

[Posted on 32501949] Diamond 0.310ct Loose Stone (E, VS1, 3Excellent) GIA Sale price¥88,800

K18 グロッシュラーガーネット 0.26ctct ペンダントトップ（ネックレストップ）

[22602626 listed] [Kalafr] K18 Grossular Garnet 0.26ct Charm Sale price¥39,800

ダイヤモンド 4.3mm/0.310ctルース(D, VS1, Excellent) GIA

[Lottery Sale 0707_02] Diamond 0.310ct Loose (D, VS1, Excellent) GIA Sale price¥89,800

ダイヤモンド 4.0mm/0.250ctルース(D, VVS1, 3Excellent) GIA

[Lottery Sale 0707_01] Diamond 0.250ct Loose Stone (D, VVS1, 3Excellent) GIA Sale price¥79,800

ダイヤモンド 3.7mm/0.185ctルース(D, VVS-2, 3Excellent H&C)

Diamond 3.7mm/0.185ct Loose (D, VVS-2, 3Excellent H&C) Sale price¥39,800

Diamond 3.0mm/0.100ct Loose (E, VVS-2, VeryGood) Sale price¥22,800

Diamond 3.8mm/ 0.198ct Loose (D, VVS-2, VeryGood) Sale price¥29,800

0.229ct Diamond Loose Stone (D, VS-2, Flanders Cut) Sale price¥39,800

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 0.320ctルース(G, IF, 3Excellent)

Internally Flawless Diamond 4.4mm/0.320ct Loose (G, IF, 3Excellent) GIA Sale price¥89,800

Diamond 3.7mm/0.197ct Loose (H, VS-1, Good) Sale price¥29,800

Diamond 3.7mm/0.194ct Loose (H, VS-2, Excellent) Sale price¥35,800

Diamond 3.7mm/0.190ct Loose (E, VVS-2, VeryGood) Sale price¥34,800

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.