color diamond

Diamond is the birthstone of April. Diamonds with a deep color are collectively called fancy color diamonds. It has various shades such as yellow, brown, pink, blue, green, and orange. Rare items such as red and blue can often be traded for billions of yen or more, depending on the color depth and size.

Karatz GemMagazine
" Colored Diamond "

South African green diamond rough (makeable) 0.117ct loose (VS-SI class equivalent) Sale price¥29,800

《Limited Edition - Pop-up Event Special》Gem Gacha 💎 Win gems such as red sapphire with a certificate, chameleon diamond, imperial topaz, alexandrite, and gems polished by Mr. Sanje. 《Multiple Purchase Discount Available》 Sale price¥4,980

[Shinjuku Marui withdrawal on 2026/03/19] [On sale Feb 8 at 22:00] Angolan Green Diamond Rough (Sawable) 0.528ct Rough (with trigons) Sale price¥198,000

【32501524掲載】ピンクダイヤモンド 0.070ctルース(FANCY VIVID PINK PURPLE, I-1)

Purple Diamond 0.070ct Loose (FANCY VIVID PINK PURPLE, I-1) Sale price¥188,000

[On Sale 3/7 at 10pm] Zimbabwe Green Diamond Rough (Sawable) 0.428ct Rough with Trigon Sale price¥158,000

K18YG アメリカ産オレゴンサンストーン 0.44ct・ピンクダイヤモンド・オレンジスピネルリング

18K Yellow Gold American Oregon Sunstone 0.44ct, Pink Diamond, Orange Spinel Ring Sale price¥158,000

[On Sale 2/23 10pm] Zimbabwe Green Diamond Rough (Sawable) 0.402ct Rough with Trigon Sale price¥148,000

[Shinjuku Marui withdrawal on 2026/03/19] [On sale 2/7 at 22:00] Pink Diamond 2.5mm/0.097ct Loose (FANCY PINK, SI2, Princess Cut) Sale price¥148,000

[On Sale 2/8 at 10 PM] Canadian Green Diamond Rough (Sawable) 0.338ct Rough (with Trigon) Sale price¥128,000

K18PGカナリーイエローダイヤモンド（トリートメント）0.214ct・アレキサンドライトリング中宝付

18KPG Canary Yellow Diamond (Treatment) 0.214ct (SI-1, Fancy Intense Greenish Yellow) and Alexandrite Ring Sale price¥128,000

Pink Diamond 0.075ct Loose (Fancy Purplish PINK, SI2) Sale price¥98,000

[Shinjuku Marui Withdrawn 20260319] Lab-Grown Diamond (Synthetic Green Diamond) 13-Stone Half Eternity Ring Set (2.0mm) Sale price¥98,000

Russian Yellow Diamond Rough (Sawable) 0.306ct Rough (Trigon) Sale price¥98,000

18KPG pink sapphire 0.32ct brown diamond ring Sale price¥69,800

South African green diamond rough (makeable) 0.298ct loose Sale price¥69,800

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

Chameleon Diamond Green Diamond 0.122ct Loose (FANCY GRAY GREEN, SI2) Sale price¥69,800

イエローダイヤモンド 0.291ctルース(FANCY INTENSE ORANGY YELLOW, SI2)

Yellow diamond 0.291ct loose (FANCY INTENSE ORANGY YELLOW, SI2) Sale price¥59,800

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

[On Sale 2/26 at 10 PM] 0.209ct Yellow Diamond Loose (FANCY DEEP BROWNISH YELLOW, VVS-2) Sale price¥49,800

Yellow Diamond 0.551ct Loose (Cabochon Cut) Sale price¥49,800

イエローダイヤモンド 0.188ctルース(FANCY INTENSE YELLOW, VS1)

Yellow diamond 0.188ct loose (FANCY INTENSE YELLOW, VS1) Sale price¥47,800

イエローダイヤモンド 0.212ctルース(FANCY DEEP ORANGY YELLOW, VS1)

Yellow diamond 0.212ct loose (FANCY DEEP ORANGY YELLOW, VS1) Sale price¥45,800

Pink diamond 2.2mm/0.043ct loose (FANCY LIGHT PURPLISH PINK, SI2) Sale price¥39,800

Fancy Intense Purple Pink Diamond 0.021ct Loose (FANCY INTENSE PURPLE PINK, SI2) Sale price¥39,800

ピンクダイヤモンド 0.051ctルース(FANCY LIGHT PINK, SI-2)

[Posted 32501454] Pink Diamond 0.051ct Loose (FANCY LIGHT PINK, SI-2) Sale price¥39,800

イエローダイヤモンド（H&C） 0.313ctルース(UNDER N(VERY LIGHT YELLOW), VVS-2, Excellent H&C)

Yellow Diamond (H&C) 4.3mm/0.313ct Loose (VERY LIGHT YELLOW), VVS-2, Excellent H&C) Sale price¥39,800

ピンクダイヤモンド 2.2mm/0.044ctルース(FANCY PURPLE PINK, I-1)

Pink diamond 2.2mm/0.044ct loose (FANCY PURPLE PINK, I-1) Sale price¥39,800

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

イエローダイヤモンド 0.153ctルース(FANCY INTENSE YELLOW ORANGE, SI1)

Yellow diamond 0.153ct loose (FANCY INTENSE YELLOW ORANGE, SI1) Sale price¥35,800

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

Pink diamond 0.030ct loose (FANCY PURPLE PINK, SI2) Sale price¥29,800

[Shinjuku Marui 20260319 Withdrawal][Sales start 2/7 22:00] Brown Diamond 5.2mm/0.561ct Loose (FANCY DARK BROWN, SI2) Sale price¥29,800

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） 0.326ctルース(FANCY DARK GRAY GREEN, SI-2)

Forest Green Diamond (Treatment) 0.326ct Loose (FANCY DARK GRAY GREEN, SI-2) Sale price¥29,800

Canary Yellow Diamond (Treatment) 0.260ct Loose (FANCY INTENSE GREENISH YELLOW*, SI-2) Sale price¥29,800

"PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device-Inspired Ring with Inspector Design [Tsunemori Akane Model] (Pink Diamond) Sale priceFrom ¥29,800

[On Sale 2/26 at 10 PM] Brown Diamond 0.174ct Loose Stone (FANCY DARK BROWN, SI-2) Sale price¥25,800

Yellow Diamond (Cabochon Cut) 0.185ct Loose Sale price¥25,800

イエローダイヤモンド 0.071ctルース(FANCY INTENSE ORANGEY YELLOW, SI2)

Fancy intense orangey yellow diamond 0.071ct loose stone (FANCY INTENSE ORANGEY YELLOW, SI2) Sale price¥25,800

Yellow diamond rough stone (makeable) 0.247ct rough stone Sale price¥22,800

ブルーダイヤモンド（トリートメント） 0.139ctルース(Fancy Greenish Blue, SI1)

Ice Blue Diamond (Treatment) 3.2mm/0.139ct Loose (Fancy Greenish Blue, SI1) Sale price¥22,800

ブルーダイヤモンド（トリートメント） 0.095ctルース(Fancy Greenish Blue, SI1)

Ice Blue Diamond (Treatment) 2.8mm/0.095ct Loose (Fancy Greenish Blue, SI1) Sale price¥19,800

ピンクダイヤモンド（ラウンドカット） 0.060ctルース(VERY LIGHT BROWN PINK, I-2)

Pink diamond (round cut) 2.5mm/0.060ct loose (VERY LIGHT BROWN PINK, I-2) Sale price¥19,800

South African yellow diamond (makeable) 0.202ct rough stone Sale price¥15,800

South African yellow diamond (makeable) 0.159ct rough stone Sale price¥12,800

Ice blue diamond 1.2mm or 2.0mm 1 stone (VS class equivalent, round cut) {Multiple purchase discount available} Sale priceFrom ¥4,980

[Available at 10 PM on March 1st] Limited Edition 10 Diamonds! 💎 Includes a 3.2mm Chameleon Diamond (VS-SI equivalent), normally priced at ¥35,800. Discounts available for multiple purchases. Sale price¥3,980

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.