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Sold out Mexican Water Opal 4.8mm/0.289ct Loose

Mexican Water Opal 4.8mm/0.289ct Loose
coming soon ガーデンクォーツ 23.495ctルース

Garden quartz 23.495ct loose Sale price¥3,980
Sold out タンザニア産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 0.928ctルース

Tanzanian Andesine Labradorite (also known as Rainbow Moonstone) 0.928ct loose stone
Sold out US Oregon Sunstone, 1.640 ct, Loose

US Oregon Sunstone, 1.640 ct, Loose
Sold out Sri Lankan Moonstone 1.487ct Loose

Sri Lankan Moonstone 1.487ct Loose
Sold out Pakistani oil-in quartz 0.595ct loose

Pakistani oil-in quartz 0.595ct loose
Sold out Brazilian Yellow Beryl 1.473 ct Loose Stone

Brazilian Yellow Beryl 1.473 ct Loose Stone
Sold out Sri Lankan Hessonite Garnet 1.674ct Loose Stone

Sri Lankan Hessonite Garnet 1.674ct Loose Stone
Sold out US Oregon Sunstone, 1.640 ct, Loose

US Oregon Sunstone, 1.640 ct, Loose
Sold out USA Oregon Sunstone 2.160ct Loose

USA Oregon Sunstone 2.160ct Loose
Sold out グリーントルマリン 2.144ctルース

Green tourmaline 2.144ct loose
Sold out 【12548254掲載】パパラチアサファイア 0.474ctルース

[12548254 published] Padparadscha sapphire 0.474ct loose
Sold out オーストラリア産レインボーラティスサンストーン 0.353ctルース

Australian rainbow lattice sunstone 0.353ct loose
Sold out Blue Garnite from Nigeria 0.514ct Ruth Japanese-German Edition

Blue Garnite from Nigeria 0.514ct Ruth Japanese-German Edition
Sold out 【12559023掲載】ブラジル産アベンチュリンベリル 0.621ctルース

Brazilian Aventurine Beryl 5.5mm/0.621ct Loose Stone
Sold out エメラルド 2.498ctルース

[Clover in cut] Emerald 9mm/2.498ct {Collaboration} Loose with patch
Sold out Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.491ct Loose Stone

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.491ct Loose Stone
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.894ct Loose Stone

Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.894ct Loose Stone
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.867ct Loose Stone

Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.867ct Loose Stone
coming soon 【12562018掲載】ブラジル産ヘルデライト 0.509ctルース

Brazilian Herderite 0.509ct loose stone Sale price¥35,800
Sold out Montana Sapphire 0.561ct loose (bicolor sapphire)

Montana Sapphire 0.561ct loose (bicolor sapphire)
Sold out コロンビア産エメラルド 2.018ctルース

[Koshu precious stone cutter pluethree] Colombian emerald 2.018ct loose
Sold out 【32501858掲載】グレーダイヤモンド 0.141ctルース(FANCY GRAY, I-1)

Loose Gray Diamond 0.141ct (FANCY GRAY, I-1)
coming soon ピンクサファリン 0.239ctルース

0.239ct Loose Pink Sapphire from Madagascar, Japan/Germany Sale price¥49,800
coming soon Bulgarian Sphalerite 5.8mm/1.058ct Loose Stone

Bulgarian Sphalerite 5.8mm/1.058ct Loose Stone Sale price¥39,800
Sold out マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.089ctルース

Bekily Blue Garnet from Madagascar (color change garnet) 0.089ct loose
Sold out 【12562641掲載】マラウイ産ムーンストーン（マラウイムーンストーン） 4.198ctルース

Malawi Moonstone 4.198ct Loose Stone
Sold out カンボジア産ブルージルコン 1.757ctルース

Cambodian Blue Zircon 1.757ct Loose
Sold out Pt950 アイスブルーダイヤモンド リング

Pt950 Ice Blue Diamond Ring
Sold out 【12544777掲載】クリソベリルキャッツアイ 1.342ctルース

Chrysoberyl cat's eye 1.342ct loose
Sold out Gray Diamond 0.200ct Loose (FANCY DARK GRAY, SI-2)

Gray Diamond 0.200ct Loose (FANCY DARK GRAY, SI-2)
Sold out 【Sales start April 18th, 10 PM JST】《Limited to 5 pieces》Midway Atoll Coral Branch (Rough), 1 piece (March Birthstone, Coral, average 26ct)《Bulk purchase discount available》

【Sales start April 18th, 10 PM JST】《Limited to 5 pieces》Midway Atoll Coral Branch (Rough), 1 piece (March Birthstone, Coral, average 26ct)《Bulk purchase discount available》
Sold out ラベンダークォーツ（スコロライト） 1.761ctルース

[Koshu Precious Stones Plusthree] Lavender Quartz (Scorolite) 1.761ct Loose Stone
Sold out マダガスカル産オイルインクォーツ1石ルース（近年発見の新しい産地,平均28ct）《複数購入割引有》

[Limited to 7 stones] 1 loose oil-in-quartz stone from Madagascar (new locality discovered in recent years, average 28ct) [Multiple purchase discounts available]
Sold out オーストラリア産ブラックオパール 0.588ctルース

[On sale May 3rd at 10 PM] Australian Black Opal 0.588ct Loose Stone
Sold out ブラジル産非加熱インペリアルトパーズ（シェリーカラー） 0.351ctルース

[On sale May 5th, 10 PM JST] Unheated Brazilian Imperial Topaz (Sherry Color) 0.351ct Loose Gemstone
Sold out ドイツ産アウイナイト 0.122ctルース

[5/5 10 PM Sale] German Hauyne 0.122ct Loose Stone
Sold out [On sale May 10th at 10 PM] "Limited to 3 stones" Brazilian Paraiba Tourmaline (Cabochon Cut approx. 3.0mm) 1 Stone Loose Gemstone "Multiple purchase discount available"

[On sale May 10th at 10 PM] "Limited to 3 stones" Brazilian Paraiba Tourmaline (Cabochon Cut approx. 3.0mm) 1 Stone Loose Gemstone "Multiple purchase discount available"
Sold out ゴーシェナイト 1.040ctルース

Goshenite 1.040ct loose
Sold out 合成アレキサンドライト 0.663ctルース

[On sale May 17th at 10 PM] Synthetic Alexandrite 5.1mm/0.663ct Loose Gemstone
Sold out マダガスカル産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 1.087ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.1mm/1.087ct loose stone
coming soon [Lottery Sale 0530_06] Internally Flawless Diamond (H&C) 0.527ct Loose Stone (E, IF, 3Excellent H&C)

[Lottery Sale 0530_06] Internally Flawless Diamond (H&C) 0.527ct Loose Stone (E, IF, 3Excellent H&C) Sale price¥228,000
coming soon [On sale June 19th, 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1 "The Big Five Gemstones"

[On sale June 19th, 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1 "The Big Five Gemstones" Sale price¥660
coming soon Benitoite Gradation 6 Stone Set (2.0mm, Round Cut, Including Top Quality) 《Multiple Purchase Discount Available》

Benitoite Gradation 6 Stone Set (2.0mm, Round Cut, Including Top Quality) 《Multiple Purchase Discount Available》 Sale price¥75,800
coming soon [June. Sales at 10 PM JST] 《Limited to 10 Stones》Sapphire Gacha Featuring Padparadscha Sapphires with DGL Certificates 💎《Multiple Purchase Discount Available》

[June. Sales at 10 PM JST] 《Limited to 10 Stones》Sapphire Gacha Featuring Padparadscha Sapphires with DGL Certificates 💎《Multiple Purchase Discount Available》 Sale price¥3,980
Sold out K18/SILVER/Pd アメジスト ペンダントトップ（ネックレストップ）

[On Sale June 18, 10 PM] [Karafuri] K18/SILVER/Pd Amethyst, Imperial Topaz Pendant Top (Necklace Top) with Appraisal Report
Sold out Pt900 合成アレキサンドライト 1.08ctct ペンダントトップ（ネックレストップ） 鑑別書

[Sale starts 6/18 at 10 PM] Colorful Pt900 Synthetic Alexandrite 1.08ct Diamond 0.06ct Pendant Top (Necklace Top) with Appraisal Certificate
Sold out K18PG ベニトアイト 0.03ct ペンダントトップ（ネックレストップ）

[Sale starts June 18th at 10 PM] [Colorful] K18PG Benitoite 0.03ct Ring with Certificate

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.