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Sold out [Sales end on 5/10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Keychain (5 types, random)

[Sales end on 5/10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Keychain (5 types, random)

Sold out [Sales end 5/10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Keychain (1 design total)

[Sales end 5/10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Keychain (1 design total)

Sold out 【12533443掲載】スフェーン 0.590ctルース

Sphene 0.590ct loose
Sold out 【12533442掲載】スフェーン 0.320ctルース

Sphene 0.320ct loose
Sold out [Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Stand (6 types in total)

[Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Stand (6 types in total)

Sold out Rose quartz 15mm/10.950ct loose

Rose quartz 15mm/10.950ct loose
Sold out バイカラーゾイサイト 0.860ct原石

[12531407 published] Bicolor Zoisite 0.860ct rough stone
Sold out Limited to 12 stones: Madagascar Sapphirine (Sapphirine) Loose Stone (Multiple purchase discounts available)

Limited to 12 stones: Madagascar Sapphirine (Sapphirine) Loose Stone (Multiple purchase discounts available)
Sold out Limited to 8 stones: 1 loose Brazilian rainbow aquamarine (pear-shaped) stone. Discounts available for multiple purchases.

Limited to 8 stones: 1 loose Brazilian rainbow aquamarine (pear-shaped) stone. Discounts available for multiple purchases.
Sold out 【KEN氏】ヘソナイトガーネット 0.309ctルース - カラッツSTORE

Hessonite Garnet 0.309ct Loose Stone
Sold out Synthetic Blue Moissanite 1 Stone Loose (6mm, Round Cut) {Multiple Purchase Discounts Available}

Synthetic Blue Moissanite 1 Stone Loose (6mm, Round Cut) {Multiple Purchase Discounts Available}

Sold out 【12532838掲載】アンドラダイトガーネット（通称名 レインボーガーネット） 2.869ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 2.869ct loose
Sold out Ametrine 1 stone (approximately 40~50ct)

Ametrine 1 stone (approximately 40~50ct)

Sold out アイオライト原石・ルース 2石セット - カラッツSTORE

Iolite rough stone/loose 2 stone set《Multiple purchase discount available》

Sold out 宝石研磨に挑戦してみよう「自分で出来る原石磨きセット」（中級者向け：アンデシン）

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for intermediate users: iolite rough stone)
Sold out Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for advanced users: rough spinel from Mozambique)

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for advanced users: rough spinel from Mozambique)

Sold out Ametrine 1 stone (approximately 60~70ct)《Discount available for multiple purchases》

Ametrine 1 stone (approximately 60~70ct)《Discount available for multiple purchases》

Sold out Hackmanite 1 stone (purple)

Hackmanite 1 stone (purple)

Sold out 【お子様限定】宝石磨きに挑戦してみよう「自分で出来る原石磨きセット」（フローライト・宝石アイシングクッキー付き）

[For kids] Let's try gem polishing "Do-it-yourself rough stone polishing set" (includes fluorite and gemstone icing cookies) *Subject to gemstone polishing contest*

Sold out Rose quartz 1 stone (heart, approx. 23ct)《Discount available for multiple purchases》

Rose quartz 1 stone (heart, approx. 23ct)《Discount available for multiple purchases》

Sold out Synthetic alexandrite 1 stone (round, mele size)《Discount available for multiple purchases》

Synthetic alexandrite 1 stone (round, mele size)《Discount available for multiple purchases》

Sold out Red spinel rough stone 1 stone (raspberry color)《Discount available for multiple purchases》

Red spinel rough stone 1 stone (raspberry color)《Discount available for multiple purchases》

Sold out Lavender Quartz 1 stone (Scorollite) 3ct 1 stone《Multiple purchase discount available》

Lavender Quartz 1 stone (Scorollite) 3ct 1 stone《Multiple purchase discount available》

Sold out Cobalt Garnite 1 stone (discount available for multiple purchases)

Cobalt Garnite 1 stone (discount available for multiple purchases)

Sold out 【宝石商の道具】加熱処理のエチオピア産オパール 1石（ブラックオパールとの見分けシート付） - カラッツSTORE

1 heat-treated Ethiopian opal (includes a sheet to distinguish it from black opal)

Sold out Rhodolite garnet (octagonal cut) 1ct 1 stone

Rhodolite garnet (octagonal cut) 1ct 1 stone

Sold out 【売り切れ】カラッツオリジナル鑑別書用アルバム・ルース1個[ケン氏カットのレアストーン] - KARATZ STORE｜カラッツSTORE

[Final Sale] [Jeweler's Tools] Karatz Original Album Loose 1 Piece [KEN Cut 1 Stone]

Sold out マルチカラートルマリン 1石（オクタゴナルカット,八角形,5mm） - KARATZ STORE｜カラッツSTORE

Multi-colored tourmaline 1 stone (octagonal cut, octagonal, 5mm)《Multiple purchase discount available》

Sold out アメジスト（12ctUP,チェッカーボード×トリリアント） - KARATZ STORE｜カラッツSTORE

Amethyst (12ctUP, checkerboard x trilliant, February birthstone)《Multiple purchase discount available》

Sold out アパタイト原石 色違い2石セット

Apatite rough stone set of 2 stones in different colors《Discount available for multiple purchases》

Sold out バロックオパール 2石 - KARATZ STORE｜カラッツSTORE

Baroque Opal 2 stones《Discount available for multiple purchases》

Sold out カーネリアン 1石 （11×9mm,約3.4ct） - KARATZ STORE｜カラッツSTORE

Carnelian 1 stone (11×9mm, approx. 3.4ct)

Sold out クリノゾイサイト 1石 - KARATZ STORE｜カラッツSTORE

clinozoisite 1 stone

Sold out スフェーン 色違い2石 - KARATZ STORE｜カラッツSTORE

Sphene 2 stones in different colors

Sold out クリノゾイサイト 1石 （ピクセルカット） - KARATZ STORE｜カラッツSTORE

Clinozoisite 1 stone (pixel cut)

Sold out プレーナイト 2.633ctルース - KARATZ STORE｜カラッツSTORE

Prehnite 2.633ct loose

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 シトリン 1.337ctルース - カラッツSTORE

Brazilian citrine 1.337ct loose stone
Sold out バイカラートルマリン2石セット 0.940ctルース

Bicolor tourmaline 2 stone set 0.940ct loose
Sold out ブラジル産レインボーアクアマリン 0.868ctルース

Brazilian Rainbow Aquamarine (Iridescent Aquamarine) 0.868ct Loose Stone

Sold out Two Koshu Kiriko plusthree stones (average 18 carats) with one Dendritic Quartz Gacha (with one Copper Rutile in Quartz) (Multiple purchase discounts available)

Two Koshu Kiriko plusthree stones (average 18 carats) with one Dendritic Quartz Gacha (with one Copper Rutile in Quartz) (Multiple purchase discounts available)

Sold out Brazilian Rainbow Aquamarine Loose Stone (Iridescent Aquamarine) (Multiple Purchase Discounts Available)

Brazilian Rainbow Aquamarine Loose Stone (Iridescent Aquamarine) (Multiple Purchase Discounts Available)
Sold out Limited to 9 stones: One loose Brazilian rainbow aquamarine (oval cut, average 0.8 carats) [Multiple purchase discounts available]

Limited to 9 stones: One loose Brazilian rainbow aquamarine (oval cut, average 0.8 carats) [Multiple purchase discounts available]
Sold out Limited to 5 stones: Pentagon Cut Gacha (Sphene, Sunstone, Emerald, etc.) 1 loose stone (Multiple purchase discounts available)

Limited to 5 stones: Pentagon Cut Gacha (Sphene, Sunstone, Emerald, etc.) 1 loose stone (Multiple purchase discounts available)
Sold out モルガナイト 0.863ctルース

Morganite 0.863ct loose

Sold out ピンクトルマリン 0.307ctルース

Pink tourmaline 0.307ct loose
Sold out コーネルピンキャッツアイ 0.422ctルース

Cornel pin cat's eye 0.422ct loose

Sold out 【KEN氏】ミントトルマリン 3.2mm/0.164ctルース - カラッツSTORE

Mint Tourmaline 3.2mm/0.164ct Loose Stone

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.