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5 major gems

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Sold out K18ピンクサファイア2.480ct ペンダントトップ（ネックレストップ） - KARATZ STORE｜カラッツSTORE

K18 pink sapphire 2.480ct pendant top (necklace top)

Sold out イエローダイヤモンド 0.071ctルース(FANCY INTENSE ORANGY YELLOW, SI2) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.071ct loose (FANCY INTENSE ORANGY YELLOW, SI2)

Sold out ピンクダイヤモンド 0.092ctルース(FANCY PURPLISH PINK, SI2) - KARATZ STORE｜カラッツSTORE

Pink diamond 0.092ct loose (FANCY PURPLISH PINK, SI2)

Sold out イエローダイヤモンド 0.092ctルース(FANCY DEEP ORANGY YELLOW, I1) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.092ct loose (FANCY DEEP ORANGY YELLOW, I1)

Sold out ピンクダイヤモンド 0.059ctルース(FANCY LIGHT PURPLISH PINK, SI1) - KARATZ STORE｜カラッツSTORE

Pink diamond 0.059ct loose (FANCY LIGHT PURPLISH PINK, SI1)

Sold out ダイヤモンド 0.025ctルース（カイトカット） - KARATZ STORE｜カラッツSTORE

Diamond 0.025ct loose (kite cut)

Sold out ダイヤモンド 0.115ctルース（トリリアントカット） - KARATZ STORE｜カラッツSTORE

Diamond 0.115ct loose (trilliant cut)

Sold out K18ブラックオパール0.23ct リング - KARATZ STORE｜カラッツSTORE

K18 black opal 0.23ct ring

Sold out K18エメラルドリング - KARATZ STORE｜カラッツSTORE

K18 emerald ring

Sold out サファイア 2.872ct原石 - KARATZ STORE｜カラッツSTORE

Sapphire 2.872ct rough stone

Sold out イエローダイヤモンド 0.081ctルース(FANCY DEEP YELLOW, SI2) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.081ct loose (FANCY DEEP YELLOW, SI2)

Sold out イエローダイヤモンド 0.249ctルース(VERY LIGHT YELLOW, SI1) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.249ct loose (VERY LIGHT YELLOW, SI1)

Sold out 非加熱ロイヤルブルーサファイア 0.71ctルース AIGS付 - KARATZ STORE｜カラッツSTORE

Unheated royal blue sapphire 0.71ct loose with AIGS

Sold out ピジョンブラッドルビー 0.54ctルース AIGS付 - KARATZ STORE｜カラッツSTORE

Pigeon blood ruby ​​0.54ct loose with AIGS

Sold out K18オパールリング - KARATZ STORE｜カラッツSTORE

K18 opal ring

Sold out ロイヤルブルーサファイア 0.59ctルース AIGS付 - KARATZ STORE｜カラッツSTORE

Royal blue sapphire 0.59ct loose with AIGS

Sold out パパラチアサファイア 0.50ctルース GIA付 - KARATZ STORE｜カラッツSTORE

Padparadscha sapphire 0.50ct loose with GIA

Sold out Pt900サファイア1.112ct リング - KARATZ STORE｜カラッツSTORE

Pt900 sapphire 1.112ct ring

Sold out エメラルド 0.08ctルース - KARATZ STORE｜カラッツSTORE

Emerald 0.08ct loose

Sold out Color change sapphire 0.208ct loose

Color change sapphire 0.208ct loose

Sold out ブラウンダイヤモンド 1.334ctルース(FANCY DARK BROWN, I1) - KARATZ STORE｜カラッツSTORE

Brown diamond 1.334ct loose (FANCY DARK BROWN, I1)

Sold out エメラルド 0.106ctルース - KARATZ STORE｜カラッツSTORE

Emerald 0.106ct loose

Sold out K18アコヤ真珠ペンダント（ネックレス） - KARATZ STORE｜カラッツSTORE

K18 Akoya pearl (Akoya pearl) pendant (necklace)

Sold out ブラックオパール 3.020ctルース - KARATZ STORE｜カラッツSTORE

Black opal 3.020ct loose

Sold out モザンビーク産ピジョンブラッドルビー 0.35ctルース AIGS付 - KARATZ STORE｜カラッツSTORE

Pigeon blood ruby ​​from Mozambique 0.35ct loose with AIGS

Sold out 《Limited to 20 Stones》Emerald Gacha: Win a 2.2ct Columbia Emerald Koshu-Kiseki Cut (normally 79,800 yen) or an Emerald Cat's Eye! 《Multiple Purchase Discount Available》

《Limited to 20 Stones》Emerald Gacha: Win a 2.2ct Columbia Emerald Koshu-Kiseki Cut (normally 79,800 yen) or an Emerald Cat's Eye! 《Multiple Purchase Discount Available》
Sold out Single loose Russian oil-free emerald (2.1mm, square cut) {Multiple purchase discounts available}

Single loose Russian oil-free emerald (2.1mm, square cut) {Multiple purchase discounts available}
Sold out Limited to 17 stones: Tanzanian bicolor sapphire, loose stone (multiple purchase discounts available)

Limited to 17 stones: Tanzanian bicolor sapphire, loose stone (multiple purchase discounts available)
Sold out 1 loose sapphire from Ratnapura, Sri Lanka (3.0mm-4.0mm, trilliant cut)《Multiple purchase discount available》

1 loose sapphire from Ratnapura, Sri Lanka (3.0mm-4.0mm, trilliant cut)《Multiple purchase discount available》

Sold out [On sale May 29th at 10 PM] "Checker x Sui" Koshu Kiseki Cut Mexican Fire Opal (usually 79,800 yen) Gacha with only 10 stones available. Win a Fire Opal (and receive one Contraluz!). [Multiple purchase discount available]

[On sale May 29th at 10 PM] "Checker x Sui" Koshu Kiseki Cut Mexican Fire Opal (usually 79,800 yen) Gacha with only 10 stones available. Win a Fire Opal (and receive one Contraluz!). [Multiple purchase discount available]
Sold out 《Limited to 16 stones》Cornflower Blue Sapphire with AIGS certificate, Royal Blue Sapphire with certificate, (Plus a beautiful yellow sapphire worth 5,980 yen as a bonus) 💎Blue Sapphire Gacha 《Multiple purchase discount available》

《Limited to 16 stones》Cornflower Blue Sapphire with AIGS certificate, Royal Blue Sapphire with certificate, (Plus a beautiful yellow sapphire worth 5,980 yen as a bonus) 💎Blue Sapphire Gacha 《Multiple purchase discount available》
Sold out Limited Edition of 11 Montana Sapphires (Rock Creek Mine) Gacha! 1 Loose Stone (Oval Cut, 5x3mm) - Multiple Purchase Discounts Available

Limited Edition of 11 Montana Sapphires (Rock Creek Mine) Gacha! 1 Loose Stone (Oval Cut, 5x3mm) - Multiple Purchase Discounts Available
Sold out Red Gemstone Gacha including Pigeon Blood Ruby AIGS worth ¥60,000 💎 Ruby and Hot Pink Sapphire (Multiple Purchase Discounts Available)

Red Gemstone Gacha including Pigeon Blood Ruby AIGS worth ¥60,000 💎 Ruby and Hot Pink Sapphire (Multiple Purchase Discounts Available)
Sold out Limited to 9 stones: Australian black opal (including semi-black opal) loose stone (includes a bonus white opal) (Multiple purchase discounts available)

Limited to 9 stones: Australian black opal (including semi-black opal) loose stone (includes a bonus white opal) (Multiple purchase discounts available)

Sold out Limited to 10 stones: Koshu Precious Stone Kiriko "Broom" plusthree 45ct Dendritic Quartz Gacha (Includes 1 Copper Rutile in Quartz) (Multiple purchase discounts available)

Limited to 10 stones: Koshu Precious Stone Kiriko "Broom" plusthree 45ct Dendritic Quartz Gacha (Includes 1 Copper Rutile in Quartz) (Multiple purchase discounts available)
Sold out Limited to 10 stones: 1 London blue diamond loose (VS-SI class equivalent, 1.8mm) Multiple purchase discounts available

Limited to 10 stones: 1 London blue diamond loose (VS-SI class equivalent, 1.8mm) Multiple purchase discounts available
Sold out 《残り4石》ジェムガチャ💎ジンバブエ産ソーヤブルダイヤモンド1石（正八面体,VS~SIクラス相当） - カラッツSTORE

Gem Gacha💎1 Zimbabwe sawable diamond (regular octahedron, VS~SI class equivalent)

Sold out グリーンランド産ルビー 1石（ラウンドカット,2mm）

1 Ruby from Greenland (round cut, 2mm) with certificate

Sold out [On sale August 1 at 10 PM] Limited 10 Stones: Sapphire Gacha (including unheated cornflower blue sapphires, normally ¥69,800), with a bonus Sange sapphire. Multiple purchase discount available.

[On sale August 1 at 10 PM] Limited 10 Stones: Sapphire Gacha (including unheated cornflower blue sapphires, normally ¥69,800), with a bonus Sange sapphire. Multiple purchase discount available.
Sold out 《Shinjuku Pop-Up Event Commemorative Offer》《Limited Stock Remaining》 Color Diamond Set (including pink, ice blue, green diamonds, and more, 9 stones or more in total), valued at ¥30,000 normally. 《Multi-Purchase Discount Available》

《Shinjuku Pop-Up Event Commemorative Offer》《Limited Stock Remaining》 Color Diamond Set (including pink, ice blue, green diamonds, and more, 9 stones or more in total), valued at ¥30,000 normally. 《Multi-Purchase Discount Available》
Sold out [Limited to 11 Stones] Madagascar Sapphire Gacha (including bicolor and silky colors, 3.5~5.4mm) [Multi-purchase discount available]

[Limited to 11 Stones] Madagascar Sapphire Gacha (including bicolor and silky colors, 3.5~5.4mm) [Multi-purchase discount available]
Sold out Bicolor Gacha including Brazilian parti-colored Paraiba tourmaline (CuO: 1.7%, MnO: 2.9%), bicolor sapphire, bicolor tourmaline, and specially cut bicolor fluorite, normally 79,800 JPY (multiple purchase discount available)

Bicolor Gacha including Brazilian parti-colored Paraiba tourmaline (CuO: 1.7%, MnO: 2.9%), bicolor sapphire, bicolor tourmaline, and specially cut bicolor fluorite, normally 79,800 JPY (multiple purchase discount available)
Sold out A single loose pink diamond, including a fancy pink diamond, normally priced at 39,800 yen (multiple purchase discounts available)

A single loose pink diamond, including a fancy pink diamond, normally priced at 39,800 yen (multiple purchase discounts available)

Sold out Limited to 15 stones: One loose, unheated silky pink sapphire from Vietnam (2.5mm, round cut) [Multiple purchase discounts available]

Limited to 15 stones: One loose, unheated silky pink sapphire from Vietnam (2.5mm, round cut) [Multiple purchase discounts available]

Sold out Limited to 11 stones: One loose, unheated silky pink sapphire from Vietnam (2.0-2.5mm, with lots of inclusions) [Multiple purchase discounts available]

Limited to 11 stones: One loose, unheated silky pink sapphire from Vietnam (2.0-2.5mm, with lots of inclusions) [Multiple purchase discounts available]

Sold out Blue Sapphire Gacha Set Includes Two Unheated Royal Blue Sapphires (with AIGS Certificate) (Plus One Sapphire from the Teppanawa Mine) (Multiple Purchase Discounts Available)

Blue Sapphire Gacha Set Includes Two Unheated Royal Blue Sapphires (with AIGS Certificate) (Plus One Sapphire from the Teppanawa Mine) (Multiple Purchase Discounts Available)
Sold out Limited Quantity Gem Gacha! Win 1 or 2 gems, including pink diamonds and 46ct candela opals. Discounts available for multiple purchases.

Limited Quantity Gem Gacha! Win 1 or 2 gems, including pink diamonds and 46ct candela opals. Discounts available for multiple purchases.
Sold out 《Limited to 9 Stones》Opal Gacha including Black Opal (plus one bonus Fire Opal) 《Bulk Purchase Discount Available》

《Limited to 9 Stones》Opal Gacha including Black Opal (plus one bonus Fire Opal) 《Bulk Purchase Discount 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.