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ブラジル産デュモルチェライトインクォーツ 1.796ctルース

Brazilian dumortierite in quartz 1.796ct loose Sale price¥15,800
ダイヤモンド 0.534ct原石

Diamond 0.534ct ​​rough stone Sale price¥9,800
バイカラートルマリン 0.675ctルース

Bicolor tourmaline 0.675ct loose Sale price¥6,980
ピンクトルマリン 0.489ctルース

Pink tourmaline 0.489ct loose Sale price¥6,980
ブラジル産デュモルチェライトインクォーツ 2.932ctルース

Brazilian Dumortierite in Quartz 2.932ct loose Sale price¥25,800
ブラジル産デュモルチェライトインクォーツ 1.894ctルース

Brazilian dumortierite in quartz 1.894ct loose Sale price¥19,800
グリーントルマリン 0.991ctルース

Green Tourmaline 6mm/0.991ct Loose Sale price¥15,800
ピンクトルマリン 0.990ctルース

Pink tourmaline 6mm/0.990ct loose stone Sale price¥12,800
ホワイトトパーズ 1.140ctルース

White topaz 1.140ct loose Sale price¥5,980
Bicolor tourmaline 0.467ct loose

Bicolor tourmaline 0.467ct loose Sale price¥6,980
ブラジル産デュモルチェライトインクォーツ 1.186ctルース

Brazilian dumortierite in quartz 1.186ct loose (faceted cut) Sale price¥12,800
ブラジル産デュモルチェライトインクォーツ 2.625ctルース

Brazilian dumortierite in quartz 2.625ct loose (faceted cut) Sale price¥26,800
ブラジル産デュモルチェライトインクォーツ 1.971ctルース

Brazilian dumortierite in quartz 1.971ct loose (faceted cut) Sale price¥19,800
ブラジル産デュモルチェライトインクォーツ 1.390ctルース

Brazilian dumortierite in quartz 1.390ct loose (faceted cut) Sale price¥15,800
ブラジル産デュモルチェライトインクォーツ 1.573ctルース

Brazilian dumortierite in quartz 1.573ct loose (faceted cut) Sale price¥18,800
ミントカラートルマリン 0.115ctルース

Mint color tourmaline 0.115ct loose Sale price¥5,980
ブラジル産バイカラートルマリン 7.489ctルース

Brazilian bicolor tourmaline 7.489ct loose Sale price¥49,800
ピンクトルマリン 1.690ctルース

Pink tourmaline 1.690ct loose Sale price¥39,800
【12546376更新】タンザナイト 1.593ctルース

Tanzanite 1.593ct loose Sale price¥15,800
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
タンザナイト 1.360ctルース

Tanzanite 1.360ct loose stone Sale price¥49,800
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 Have fun guessing what you'll receive! Gacha set of two gemstones (including rare stones) (Multiple purchase discounts available)

Have fun guessing what you'll receive! Gacha set of two gemstones (including rare stones) (Multiple 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 Brazilian Paraiba Tourmaline (Batalha Mine) Gacha 💎 Usually ¥45,800 With sorting, includes unheated. 《Multiple purchase discount available》

Brazilian Paraiba Tourmaline (Batalha Mine) Gacha 💎 Usually ¥45,800 With sorting, includes unheated. 《Multiple purchase discount available》

Sold out Set of 2 Tanzanite stones from Tanzania (2mm, round cut) {Multiple purchase discount available}

Set of 2 Tanzanite stones from Tanzania (2mm, round cut) {Multiple purchase discount available}
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 [Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire

[Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire
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 Brazilian Paraiba Tourmaline (1.0mm, top quality)《Multiple purchase discount available》

Brazilian Paraiba Tourmaline (1.0mm, top quality)《Multiple purchase discount available》

Sold out プリンセスカットダイヤモンド 2.0mm ルース（VSクラス相当）

Princess cut diamond 2.0mm loose (equivalent to VS class)《Multiple purchase discount available》

Sold out Limited to 13 stones! Tourmaline gacha featuring indigolite tourmaline worth ¥50,000 and rubellite worth ¥60,000. Plus, one canary yellow tourmaline. Discounts available for multiple purchases.

Limited to 13 stones! Tourmaline gacha featuring indigolite tourmaline worth ¥50,000 and rubellite worth ¥60,000. Plus, one canary yellow tourmaline. Discounts available for multiple purchases.

Sold out Limited to 15 sets: Two Nigerian tourmaline gemstones (October birthstone) Discounts available for multiple purchases

Limited to 15 sets: Two Nigerian tourmaline gemstones (October birthstone) Discounts available for multiple purchases
Sold out Limited to 25 stones: Brazilian Paraiba Tourmaline (including bicolor, Batalha) rough stones, average size 0.1ct. Discounts for multiple purchases available.

Limited to 25 stones: Brazilian Paraiba Tourmaline (including bicolor, Batalha) rough stones, average size 0.1ct. Discounts for multiple purchases available.
Sold out [Limited to 24 stones] Tourmaline Gacha💎Indigolite tourmaline, clover cut, and other single loose stones {Multiple purchase discounts available}

[Limited to 24 stones] Tourmaline Gacha💎Indigolite tourmaline, clover cut, and other single loose stones {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 May 29, 10 PM JST] 《Limited 13 Stones》Yellow Diamond Gacha, win a VVS-2/4.3mm/with Sorting Report worth 39,800 yen (regular price) 💎《Multiple Purchase Discount Available》

[On Sale May 29, 10 PM JST] 《Limited 13 Stones》Yellow Diamond Gacha, win a VVS-2/4.3mm/with Sorting Report worth 39,800 yen (regular price) 💎《Multiple Purchase Discount Available》
Sold out 《Limited to 13 stones》Synthetic Gacha (with additional synthetic alexandrite) including D/IF/3EX lab-grown diamonds normally priced at 39,800 yen and Sakura-cut YAGs normally priced at 59,800 yen. 《Multiple purchase discount available》

《Limited to 13 stones》Synthetic Gacha (with additional synthetic alexandrite) including D/IF/3EX lab-grown diamonds normally priced at 39,800 yen and Sakura-cut YAGs normally priced at 59,800 yen. 《Multiple purchase discount available》
Sold out Limited to 20 stones: Russian Demantoid Garnet (Horsetail inclusions, approximately 2mm) - 1 loose stone. Discounts available for multiple purchases.

Limited to 20 stones: Russian Demantoid Garnet (Horsetail inclusions, approximately 2mm) - 1 loose stone. Discounts available for multiple purchases.

Sold out Limited to 20 stones, Brazilian dendritic quartz, 1 loose stone, multiple purchase discounts available

Limited to 20 stones, Brazilian dendritic quartz, 1 loose stone, multiple purchase discounts available
Sold out 《Limited to 16 stones》1 tanzanite stone (octagonal cut, 3.0mm)《Multiple purchase discount available》

《Limited to 16 stones》1 tanzanite stone (octagonal cut, 3.0mm)《Multiple purchase discount available》
Sold out Imperial Topaz Gacha: Win a Pink Imperial Topaz, normally priced at 69,800 yen (Multiple purchase discounts available)

Imperial Topaz Gacha: Win a Pink Imperial Topaz, normally priced at 69,800 yen (Multiple purchase discounts available)

Sold out Limited Edition of 16 Blue Stones (Bicolor Benitoite, Brazilian Paraiba Tourmaline, Santa Maria Aquamarine, etc.)

Limited Edition of 16 Blue Stones (Bicolor Benitoite, Brazilian Paraiba Tourmaline, Santa Maria Aquamarine, etc.)
Sold out 《Limited to 15 Stones》Rare Stone Gacha 💎 Featuring non-oiled red beryl with GIA certificate for 98,000 yen, cinnabar, Mozambique Paraiba tourmaline, benitoite, and more. 《Multiple purchase discount available》

《Limited to 15 Stones》Rare Stone Gacha 💎 Featuring non-oiled red beryl with GIA certificate for 98,000 yen, cinnabar, Mozambique Paraiba tourmaline, benitoite, and more. 《Multiple 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.