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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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南アフリカ産ダイヤモンド原石（ソーヤブル） 0.110ct原石

South African diamond rough (sawable) 0.110ct rough Sale price¥25,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.091ct原石

South African diamond rough (sawable) 0.091ct rough Sale price¥22,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.085ct原石

South African diamond rough (sawable) 0.085ct rough Sale price¥19,800
ダイヤモンド（カボションカット） 0.206ctルース

Diamond (cabochon cut) 0.206ct loose Sale price¥55,800
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
ダイヤモンド 0.144ctルース(I, VS1, Good)

Diamond 3.4mm/0.144ct loose stone (I, VS1, Good) Sale price¥16,800
ラボグロウンダイヤモンド（合成ダイヤモンド） 0.290ctルース(FANCY VIVID PINK, VS-2)

Lab-grown pink diamond (synthetic pink diamond) 0.290ct loose (FANCY VIVID PINK, VS-2) Sale price¥59,800
ダイヤモンド 0.967ct原石

Diamond rough stone 0.967ct Sale price¥5,980
ダイヤモンド 1.293ct原石

Diamond rough stone 1.293ct Sale price¥5,980
Chameleon Diamond Green Diamond 0.122ct Loose (FANCY GRAY GREEN, SI2)

Chameleon Diamond Green Diamond 0.122ct Loose (FANCY GRAY GREEN, SI2) Sale price¥69,800
Diamond 0.320ct loose (D, VS2)

Diamond 0.320ct loose (D, VS2) Sale price¥79,800
ソルトアンドペッパーダイヤモンド 0.446ctルース

Salt and pepper diamond 0.446ct loose Sale price¥39,800
南アフリカ産グリーンダイヤモンド原石（メイカブル） 0.117ctルース

South African green diamond rough (makeable) 0.117ct loose (VS-SI class equivalent) Sale price¥29,800
ピンクダイヤモンド 0.021ルース(FANCY INTENSE PURPLE PINK, SI2)

Pink diamond 0.021 loose (FANCY INTENSE PURPLE PINK, SI2) Sale price¥49,800
ピンクダイヤモンド 0.073ルース(FANCY DEEP PURPLISH PINK, SI1)

Pink Diamond 0.073 Loose (FANCY DEEP PURPLISH PINK, SI1) Sale price¥88,800
Gray diamond 1.247ct loose

Gray diamond 1.247ct loose Sale price¥228,000
Gray diamond 0.618ct loose

Gray diamond 0.618ct loose Sale price¥128,000
Pink diamond 0.030ct loose (FANCY PURPLE PINK, SI2)

Pink diamond 0.030ct loose (FANCY PURPLE PINK, SI2) Sale price¥29,800
Pink diamond 0.086ct loose (FANCY INTENSE PURPLE PINK, I1)

Pink diamond 0.086ct loose (FANCY INTENSE PURPLE PINK, I1) Sale price¥138,000
Pink diamond 0.070ct loose (FANCY INTENSE PURPLE PINK, I1)

Pink diamond 0.070ct loose (FANCY INTENSE PURPLE PINK, I1) Sale price¥118,000
Pt900アイスブルーダイヤモンド0.333ct 0.333ct ピアス

Pt900 ice blue diamond 0.333ct/0.333ct earrings Sale price¥98,000
ダイヤモンド 0.534ct原石

Diamond 0.534ct ​​rough stone Sale price¥9,800
Silky diamond 2.7mm/0.086ct loose

Silky diamond 2.7mm/0.086ct loose Sale price¥14,800
Silky diamond 2.8mm/0.097ct loose

Silky diamond 2.8mm/0.097ct loose Sale price¥14,800
Silky diamond 2.7mm/0.090ct loose

Silky diamond 2.7mm/0.090ct loose Sale price¥12,800
South African yellow diamond (makeable) 0.202ct rough stone

South African yellow diamond (makeable) 0.202ct rough stone Sale price¥17,800
South African yellow diamond (makeable) 0.193ct rough stone

South African yellow diamond (makeable) 0.193ct rough stone Sale price¥9,800
South African gray diamond (makeable) 0.169ct rough stone

South African gray diamond (makeable) 0.169ct rough stone Sale price¥15,800
South African yellow diamond (makeable) 0.159ct rough stone

South African yellow diamond (makeable) 0.159ct rough stone Sale price¥15,800
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
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¥64,800
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¥38,800
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 0.245ctルース(FANCY INTENSE ORANGY YELLOW, SI1)

Yellow diamond 0.245ct loose (FANCY INTENSE ORANGY YELLOW, SI1) Sale price¥55,800
Diamond 0.120ct loose (G, VS2, Excellent H&C)

Diamond 0.120ct loose (G, VS2, Excellent H&C) Sale price¥28,800
ダイヤモンド 0.096ctルース(D, SI1)

Diamond 0.096ct loose (D, SI1, octagonal cut) Sale price¥19,800
ダイヤモンド 0.126ctルース(F, VS2)

Diamond 0.126ct loose (F, VS2, octagonal cut) Sale price¥25,800
Pink diamond 2.4mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.4mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥69,800
Pink diamond 2.4mm/0.071ct loose (FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.4mm/0.071ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥98,000
Pink diamond 2.2mm/0.041ct loose (FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.2mm/0.041ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥57,800
Pink diamond 2.3mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.3mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥79,800
Pink diamond 2.2mm/0.043ct loose (FANCY LIGHT PURPLISH PINK, SI2)

Pink diamond 2.2mm/0.043ct loose (FANCY LIGHT PURPLISH PINK, SI2) Sale price¥59,800
ピンクダイヤモンド 0.063ctルース(FANCY INTENSE PURPLE PINK, I-1)

Pink diamond 0.063ct loose (FANCY INTENSE PURPLE PINK, I-1) Sale price¥138,000
ピンクダイヤモンド 0.067ctルース(FANCY INTENSE PURPLE PINK, I-1)

Pink diamond 0.067ct loose (FANCY INTENSE PURPLE PINK, I-1) Sale price¥148,000
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
ダイヤモンド 0.051ctルース

Diamond 0.051ct loose (trapeze cut, VS class equivalent) Sale price¥9,800
Diamond 0.777ct loose (butterfly cut)

Diamond 0.777ct loose (butterfly cut) Sale price¥77,777
ダイヤモンド原石（メイカブル） 0.247ct原石

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

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の取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

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.