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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） 0.112ct原石

South African diamond rough (sawable) 0.112ct rough Sale price¥44,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.091ct原石（トライゴン）

South African diamond rough (sawable) 0.091ct rough (trigon) Sale price¥35,800
イエローダイヤモンド（カボションカット） 0.185ctルース

Yellow Diamond (Cabochon Cut) 0.185ct Loose Sale price¥25,800
13-stone diamond half eternity ring set (VS class, D-G color, H&C, 2.0mm)

13-stone diamond half eternity ring set (VS class, D-G color, H&C, 2.0mm) Sale price¥158,000
ダイヤモンド 3.8mm/0.209ルース(G, VVS1, 3Excellent H&C)

Diamond 3.8mm/0.209 Loose (G, VVS1, 3Excellent H&C) Sale price¥59,800
Salt and pepper diamond & black diamond 13 stone half eternity ring set (2.0mm)

Salt and pepper diamond & black diamond 13 stone half eternity ring set (2.0mm) Sale price¥98,000
Lab-grown diamond (synthetic green diamond) 13 stone half eternity ring set (2.0mm)

Lab-grown diamond (synthetic green diamond) 13 stone half eternity ring set (2.0mm) Sale price¥98,000
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
Canary Yellow Diamond (Treatment) 0.260ct Loose (FANCY INTENSE GREENISH YELLOW*, SI-2)

Canary Yellow Diamond (Treatment) 0.260ct Loose (FANCY INTENSE GREENISH YELLOW*, SI-2) Sale price¥29,800
ダイヤモンド（カボションカット） 0.183ctルース

Diamond (cabochon cut) 0.183ct loose Sale price¥24,800
ダイヤモンド（カボションカット） 0.366ctルース

Diamond (cabochon cut) 0.366ct loose Sale price¥59,800
ロシア産イエローダイヤモンド原石（ソーヤブル） 0.306ct原石

Russian Yellow Diamond Rough (Sawable) 0.306ct Rough (Trigon) Sale price¥98,000
ダイヤモンド 0.171ctルース(E, VS2)

Diamond 0.171ct loose stone (E, VS2, radiant cut) Sale price¥35,800
K18YGローズカットダイヤモンド0.171ctリング

K18YG rose cut diamond 0.171ct ring Sale price¥89,800
ダイヤモンド 0.128ctルース（カボションカット,マロンカット）

Diamond 0.128ct loose stone (cabochon cut, maroon cut) Sale price¥39,800
ロシア産ダイヤモンド原石（ソーヤブル） 0.094ct原石

Russian diamond rough (sawable) 0.094ct rough Sale price¥24,800
ロシア産ダイヤモンド原石（ソーヤブル） 0.098ctルース

Russian rough diamond (sawable) 0.098ct loose Sale price¥24,800
ダイヤモンド原石（ソーヤブル） 0.125ctルース

Russian rough diamond (sawable) 0.125ct loose Sale price¥29,800
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
ロシア産ダイヤモンド原石（ソーヤブル） 0.088ctルース

Russian rough diamond (sawable) 0.088ct loose Sale price¥22,800
ロシア産ダイヤモンド原石（ソーヤブル） 0.103ctルース

Russian Diamond Rough (Sawable) 0.103ct Loose (Trigon) Sale price¥25,800
ロシア産ダイヤモンド原石（ソーヤブル） 0.117ctルース

Russian rough diamond (sawable) 0.117ct loose Sale price¥29,800
ロシア産ダイヤモンド原石（ソーヤブル） 0.101ctルース

Russian rough diamond (sawable) 0.101ct loose Sale price¥25,800
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
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
ダイヤモンド 0.534ct原石

Diamond 0.534ct ​​rough stone Sale price¥9,800
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
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
ダイヤモンド 0.348ctルース(I, SI1)

Diamond 0.348ct loose (I, SI1) Sale price¥59,800
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
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 [Available at 10 PM on January 11th] Limited Quantities! January Campaign Gem Gacha! Green Diamonds, Hot Pink Spinel, and More, Normally ¥39,800! Multi-Purchase Discounts Available!

[Available at 10 PM on January 11th] Limited Quantities! January Campaign Gem Gacha! Green Diamonds, Hot Pink Spinel, and More, Normally ¥39,800! Multi-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 Fun Gem Gacha! 💎 Get diamonds (normally 29,800 yen) (D/VS/3EX H&C with Medium Certificate), special cut Oresund and Unloved, and more! (Multiple purchase discounts available)

Fun Gem Gacha! 💎 Get diamonds (normally 29,800 yen) (D/VS/3EX H&C with Medium Certificate), special cut Oresund and Unloved, and more! (Multiple purchase discounts available)

Sold out Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available}

Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available}
Sold out Custom-made lucky bag for beginners💎 Includes two gemstones (one with a diamond), a CZ set, and a ring image holder (multiple purchase discounts available)

Custom-made lucky bag for beginners💎 Includes two gemstones (one with a diamond), a CZ set, and a ring image holder (multiple purchase discounts available)
Sold out Pink Diamond Gacha! 💎 Fancy Light Pink Diamond 0.117ct (Certified) Includes One UV-Resistant Pink Diamond (Multiple Purchase Discounts Available)

Pink Diamond Gacha! 💎 Fancy Light Pink Diamond 0.117ct (Certified) Includes One UV-Resistant Pink Diamond (Multiple Purchase Discounts Available)

Sold out Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Sold out [On sale 1/18 at 10 PM] FANCY PURPLISH PINK/SI-1/Includes Pink Diamond Gacha (Multiple purchase discounts available)

[On sale 1/18 at 10 PM] FANCY PURPLISH PINK/SI-1/Includes Pink Diamond Gacha (Multiple purchase discounts available)

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.