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Sold out 【猫カット】プレーナイト（6mm） - カラッツSTORE

[Cat cut] Play night (6mm)

Sold out アパタイト1石ルース（ブリオレットカット,約4×5mm）

Apatite 1 stone loose (briolette cut, approx. 4 x 5 mm)《Multiple purchase discount available》

Sold out ジョウハチドーライト 0.049ctルース

Johachi Dolite 0.049ct loose

Sold out ジョウハチドーライト 0.042ctルース

Johachi Dolite 0.042ct loose

Sold out ピンクスピネル1

1 stone loose pink spinel (princess cut, approx. 2.5mm)《Discount available for multiple purchases》

Sold out クリソベリルキャッツアイ 1石（2月新誕生石）

Chrysoberyl Cat's Eye 1 stone (February new birthstone)

Sold out ペリステライト 0.690ctルース 日独鑑

Peristerite 0.690ct loose Japanese-German book

Sold out グランディディエライト原石 1石

1 stone grandidierite rough stone from Madagascar《Multiple purchase discount available》

Sold out Blue moonstone (pyramid cut, 5 x 5 mm, 4 x 4 mm) 2 stone set《Discount available for multiple purchases》

Blue moonstone (pyramid cut, 5 x 5 mm, 4 x 4 mm) 2 stone set《Discount available for multiple purchases》

Sold out 1 sky blue topaz stone (10mm, flower cut)《Discount available for multiple purchases》

1 sky blue topaz stone (10mm, flower cut)《Discount available for multiple purchases》

Sold out Swiss blue topaz 1 stone (9.5 x 8mm, special cut)《Multiple purchase discount available》

Swiss blue topaz 1 stone (9.5 x 8mm, special cut)《Multiple purchase discount available》

Sold out Swiss Blue Topaz 1 stone (10 x 8mm, special cut)《Discount available for multiple purchases》

Swiss Blue Topaz 1 stone (10 x 8mm, special cut)《Discount available for multiple purchases》

Sold out 1 stone peridot (pyramid cut, 5mm)《Multiple purchase discount available》

1 stone peridot (pyramid cut, 5mm)《Multiple purchase discount available》

Sold out 1 Ethiopian Opal (Baroque)《Discount available for multiple purchases》

1 Ethiopian Opal (Baroque)《Discount available for multiple purchases》

Sold out Let's try polishing gemstones with the "Do-it-yourself gemstone polishing kit" (for intermediate users: Andesine Labradorite from Madagascar)

Let's try polishing gemstones with the "Do-it-yourself gemstone polishing kit" (for intermediate users: Andesine Labradorite from Madagascar)

Sold out スターサファイア 0.32ctルース

Blue Star Sapphire 0.32ct loose

Sold out Fire Opal (Common Opal) 2 stone set《Discount available for multiple purchases》

Fire Opal (Common Opal) 2 stone set《Discount available for multiple purchases》

Sold out 【12522527掲載】デンドリティックアゲート 9.940ctルース

Dendritic Agate 9.940ct loose

Sold out 【12522526掲載】デンドリティックアゲート 12.080ctルース

Dendritic Agate 12.080ct loose

Sold out 【大人用】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」（初心者向け：バイカラーフローライト）・ボルダーオパール付※原石磨きコンテスト対象 ※

[For adults] Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for beginners: bicolor fluorite) with boulder opal *Subject to the rough stone polishing contest*

Sold out Purple Chalcedony 1 stone《Discount available for multiple purchases》

Purple Chalcedony 1 stone《Discount available for multiple purchases》

Sold out 【#May2026Campaign,#May2026Gacha】Yooperlite 1 Stone Approx. 15-20ct (Michigan, USA) 《Multi-purchase discount》

【#May2026Campaign,#May2026Gacha】Yooperlite 1 Stone Approx. 15-20ct (Michigan, USA) 《Multi-purchase discount》

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 [Jeweler's Tools] 2-piece loose tweezers set with stopper (for small jewelry)

[Jeweler's Tools] 2-piece loose tweezers set with stopper (for small jewelry)

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 [Jeweler's Tools] Digital Caliper Color Shift Amethyst 2 Piece Set

[Jeweler's Tools] Digital Caliper Color Shift Amethyst 2 Piece Set

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

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.