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合成モアッサナイト1石ルース（ミントグリーン,ペアシェイプカット,5×7mm)

Synthetic moissanite 1 stone loose (mint green, pear shape cut, 5 x 7 mm, moissanite)《Multiple purchase discount available》 Sale price¥3,980
H&C (Heart & Cupid) Diamond 2.0mm Loose (VS Class, DG Class, 2mm Melee Diamonds) {Multiple Purchase Discounts Available}

H&C (Heart & Cupid) Diamond 2.0mm Loose (VS Class, DG Class, 2mm Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥7,980
ホーランダイトインクォーツ 7.300ctルース

Hollandite in quartz 7.300ct loose Sale price¥25,800
Brazilian alexandrite (average 0.12ct) loose (multiple purchase discount available)

Brazilian alexandrite (average 0.12ct) loose (multiple purchase discount available) Sale price¥19,800
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：ホワイトラブラドライト）

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for intermediate users: white labradorite) Sale price¥3,980
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》 Sale price¥2,980
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」（初心者向け：フローライト・アパタイト2石セット）

Let's try gem polishing "Do-it-yourself rough stone polishing set" (for beginners: fluorite/apatite 2 stone set) Sale price¥2,980
ピンクスピネル1

1 stone loose pink spinel (princess cut, approx. 2.5mm)《Discount available for multiple purchases》 Sale price¥2,980
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》 Sale price¥4,980
【宝石商の道具】冷却ヒビ入れ染色クォーツ色違い2石セット - カラッツSTORE

[Jeweler's Tools] Cooling Cracked Dyed Quartz Set of 2 Stones in Different Colors (Discount available for multiple purchases) Sale price¥2,980
【カラフリ】Pt900ボルダーオパール15.82ct ペンダントトップ（ネックレストップ） - カラッツSTORE

[Colorful] Pt900 Boulder Opal 15.82ct Pendant Top (Necklace Top) Sale price¥69,800
Petalite 1 stone loose (6mm, round cut)《Multiple purchase discount available》

Petalite 1 stone loose (6mm, round cut)《Multiple purchase discount available》 Sale price¥2,580
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 gem polishing "Do-it-yourself rough stone polishing set" (for intermediate users: Andesine) Sale price¥2,980
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) Sale price¥3,980
スキャポライトキャッツアイ 8.880ctルース

Scapolite Cat's Eye 8.880ct Loose Sale price¥8,800
【12525413掲載】コーネルピン 0.730ct原石

Cornerpine 0.730ct rough stone Sale price¥4,980
Bicolor spinel 1.17ct loose

Bicolor spinel 1.17ct loose Sale price¥79,800
Cambodian Blue Zircon (Ratanakiri Blue) 23.12ct Loose

Cambodian Blue Zircon (Ratanakiri Blue) 23.12ct Loose Sale price¥498,000
スキャポライト 5.57ctルース

Orange Scapolite 5.57ct loose Sale price¥19,800
Sky blue topaz 1 stone (10mm, flower cut)《Discount available for multiple purchases》

Sky blue topaz 1 stone (10mm, flower cut)《Discount available for multiple purchases》 Sale price¥5,980
Let's try jewelry polishing "Do-it-yourself rough stone polishing set" (for beginners: fluorite 2 stone set)

Let's try jewelry polishing "Do-it-yourself rough stone polishing set" (for beginners: fluorite 2 stone set) Sale price¥2,980
[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) Sale price¥3,980
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》 Sale price¥2,980
[Resale] [Jeweler's Tools] Black Light, 3 Loose Stones (Ruby, Red Spinel, Oil in Quartz) with Rechargeable Battery

[Resale] [Jeweler's Tools] Black Light, 3 Loose Stones (Ruby, Red Spinel, Oil in Quartz) with Rechargeable Battery Sale price¥6,980
Sold out アフガニスタン産ラズライトインソーダライト 0.438ctルース

Afghanistan Lazurite in Sodalite 0.438ct Loose Stone
Sold out アフガニスタン産ラズライトインソーダライト 0.195ctルース

Afghanistan Lazurite in Sodalite 0.195ct Loose Stone
Sold out デンドリティックアゲート 1.859ctルース

[Cat Cut] Brazilian Dendritic Agate 1.859ct Loose
Sold out スリランカ産サファリン 0.261ctルース 鑑別書

Sri Lankan saffron 0.261ct loose stone with certificate

Sold out バイカラーサファイア 0.970ctルース

Bicolor sapphire 0.970ct loose stone
Sold out アメリカ産オレゴンサンストーン 0.657ctルース

Oregon Sunstone from the United States 0.657ct loose stone
Sold out ホンジュラスオパール 1.678ctルース

Honduran Opal 1.678ct Loose
Sold out ペリドット 3.847ctルース

Peridot 3.847ct loose stone
coming soon キャシテライト 0.571ctルース

Cassiterite 4.0mm/0.571ct Loose Stone with Certificate of Authenticity Sale price¥14,800
Sold out ブラジル産アレキサンドライト 0.054ctルース（エメラルドカット）

Brazilian Alexandrite 0.054ct loose stone (emerald cut)
Sold out ホンジュラスオパール 1.264ctルース

Honduran Opal 1.264ct Loose
Sold out スリランカ産イエローサファイア 0.481ctルース

Sri Lankan Yellow Sapphire 0.481ct Loose
Sold out インドネシア産パラサイティックペリドット・キャッツアイ 0.489ctルース

Indonesian Parasitic Peridot Cat's Eye 0.489ct Loose Stone
Sold out コーンフラワーブルーサファイア 0.480ctルース

Cornflower Blue Sapphire 4.5mm/0.480ct Loose Stone AIGS
Sold out ブラジル産インディゴライトトルマリン 0.784ctルース 鑑別書

Brazilian Indigolite Tourmaline 0.784ct Loose Stone with Certificate of Authenticity
Sold out パパラチアサファイア 0.240ctルース

Madagascar Padparadscha Sapphire 0.240ct Loose GIA

Sold out 【山本武氏】ブラジル産ロッククリスタル 19.239ctルース

[Takeshi Yamamoto] Brazilian rock crystal 19.239ct loose stone
Sold out スリランカ産エカナイト 0.830ctルース

Ekanite from Sri Lanka 0.830ct loose
Sold out バイカラートルマリン 0.763ctルース（ローズカット）

Brazilian bicolor tourmaline 0.763ct loose stone (rose cut)
Sold out ミャンマー産レッドスピネル 0.165ctルース

Myanmar Red Spinel 0.165ct Loose
Sold out ミャンマー産レッドスピネル 0.183ctルース

Myanmar Red Spinel 3.5mm/0.183ct Loose Stone
Sold out ジンバブエ産バイカラーユークレース 0.108ctルース

Zimbabwe Bicolor Euclase 3.0mm/0.108ct Loose Stone
Sold out ナミビア産ジェレメジェバイト 0.136ctルース

Namibian Jeremejevite 0.136ct loose stone with certificate
Sold out パキスタン産アキシナイト（ブルーティント） 0.623ctルース

Pakistani Axinite (Blue Tint) 0.623ct 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.