Login

Out of stock

Sort by
Sold out コロンビア産パイライトインエメラルド 2.503ctルース

2.503 ct Loose Emerald with Pyrite from Colombia

Sold out Loose Columbian Pyrite in Emerald 3.346 ct

Loose Columbian Pyrite in Emerald 3.346 ct

Sold out Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.254ct Loose Stone

Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.254ct Loose Stone

Sold out Madagascar Bekily Blue Garnet (Color Change Garnet) 0.221ct Loose Stone

Madagascar Bekily Blue Garnet (Color Change Garnet) 0.221ct Loose Stone
Sold out 【12562769掲載】ブラジル産マイカインローズクォーツ（雲母インローズクォーツ） 3.123ctルース

Brazilian Mica in Rose Quartz (Muscovite in Rose Quartz) 3.123ct Loose

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 Brazilian Swiss Blue Topaz 1.198ct Loose

Brazilian Swiss Blue Topaz 1.198ct Loose
coming soon タンザニア産アレキサンドライト 0.843ct原石

Rough Tanzanian Alexandrite 0.843ct Sale price¥29,800
Sold out コロンビア産パイライトインエメラルド 2.780ctルース

Colombian Pyrite Inclusion Emerald 2.780ct Loose Rare Stone [Limited to 1 pc] ¥198,000 12562799

Sold out アフガニスタン産アウイナイト 0.437ctルース 中宝

[On sale May 6, 10 PM] Afghan Hauyne 0.437 ct Loose Gemstone, Chuo鑑定済
Sold out 【12562779掲載】ブラジル産デンドリティックアゲート 12.309ctルース

[On sale May 2, 10 PM] Brazilian Dendritic Agate 12.309ct Loose Stone
Sold out [Sale starts 10 PM JST on 5/14] Colombian Emerald 1.571ct Loose Stone Pendant Top

[Sale starts 10 PM JST on 5/14] Colombian Emerald 1.571ct Loose Stone Pendant Top
Sold out コロンビア産エメラルド 4.7mm/0.468ctルース

[On sale 5/5 at 22:00] Colombian Emerald 4.7mm/0.468ct Loose Stone

Sold out 【12562785掲載】コロンビア産エメラルドキャッツアイ 0.574ctルース

【On sale May 2nd, 10 PM JST】Colombian Emerald Cat's Eye 0.574ct Loose Stone
Sold out ボリビア産フォスフォフィライト 0.448ctルース

Bolivian Phosphophyllite 0.448ct Loose Stone with Certificate

Sold out Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification

Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification
Sold out K18PG モルガナイト ペンダントトップ（ネックレストップ）

[On sale May 14th at 10 PM] [Colorfri] K18PG Morganite and 0.04ct Diamond Pendant Top (Necklace Top) with Appraisal Report
Sold out 【22602584掲載】【カラフリ】Pt900 ブルージルコン（ラタナキリブルー） 2.27ct リング

[On sale May 1st at 10 PM] [Colorfuri] Pt900 Blue Zircon (Ratanakiri Blue) 2.27ct/Diamond 0.28ct Ring

Sold out 【22602585掲載】【カラフリ】K18PG スピネル 0.48ct ペンダントトップ（ネックレストップ）

[On sale May 3rd, 10 PM JST] [Colorfury] K18PG Pink Spinel 0.48ct Pendant Top (Necklace Top) with Identification Card
Sold out 【32501881掲載】インターナリーフローレスダイヤモンド（H&C） 0.340ctルース(F, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 4.5mm/0.340ct Loose (F, IF, 3Excellent H&C) GIA & CBT

Sold out フローレスダイヤモンド（H&C） 0.230ctルース(D, FL, 3Excellent H&C)

Flawless Diamond (H&C) 4.0mm/0.230ct Loose (D, FL, 3Excellent H&C) GIA & Central Gem Laboratory

Sold out 【32501889掲載】ダイヤモンド（H&C） 0.194ctルース(G, VVS-1, 3Excellent H&C)

Diamond (H&C) 3.7mm/0.194ct Loose (G, VVS-1, 3Excellent H&C)

Sold out ダイヤモンド 0.095ctルース(F, VS-2, Excellent)

Diamond 3.0mm/0.095ct Loose (F, VS-2, Excellent)

Sold out ダイヤモンド 3.0mm/0.101ctルース(D, VVS-2, VeryGood)

Diamond 3.0mm/0.101ct Loose Stone (D, VVS-2, VeryGood)

Sold out ダイヤモンド 0.310ctルース(E, VS1, 3Excellent)

Diamond 4.3mm/0.310ct Loose (E, VS1, 3Excellent) GIA

Sold out ダイヤモンド（H&C） 0.200ctルース(D, VVS-2, 3Excellent H&C)

Diamond (H&C) 3.8mm/0.200ct Loose (D, VVS-2, 3Excellent H&C) CBT

Sold out インターナリーフローレスダイヤモンド（H&C） 0.300ctルース(D, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 4.3mm/0.300ct Loose (D, IF, 3Excellent H&C) GIA&CGL

Sold out [Shipping and public settings notice] Bracelet processing fee for Mochizuki template [For Mr.]

[Shipping and public settings notice] Bracelet processing fee for Mochizuki template [For Mr.]

Sold out 【12562843掲載】コーネルピン 0.700ctルース

Tanzanian Kornerupine 0.700ct Loose Stone
Sold out 【22602563掲載】K18 アルマンディンガーネット リング

[Sales begin May 2nd, 10 PM JST] K18 Almandine Garnet Chain Ring
Sold out 【22602564掲載】K18 タンザナイト リング

[Sales start May 2, 10 PM] K18 Tanzanite Chain Ring
Sold out 【22602565掲載】K18 ブルーサファイア リング

[On sale May 2nd at 10 PM] K18 Blue Sapphire Ring
Sold out 【22602567掲載】K18 シトリン リング

[On sale May 2nd at 10 PM] K18 Citrine Chain Ring
Sold out ブラジル産パライバトルマリン 0.177ctルース

Brazilian Paraiba Tourmaline 0.177ct loose stone (CuO: 2.1%, MnO: 1.3%)
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） 1.003ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 1.003ct loose stone
Sold out 【32501905掲載】ブルーダイヤモンド（トリートメント） 0.801ctルース(FANCY INTENSE GREEN BLUE, SI-2)

Sky Blue Diamond (Treated) 0.801ct Loose Stone (FANCY INTENSE GREEN BLUE, SI-2) Certificate

Sold out Diamond 3.8mm/0.319ct Loose (F, SI-1, Princess Cut)

Diamond 3.8mm/0.319ct Loose (F, SI-1, Princess Cut)
Sold out [On sale May 3rd, 10 PM JST] Garnet Gacha (Round Cut, 2.5mm) Cut by American lapidary artist KEN 《Bulk purchase discount available》

[On sale May 3rd, 10 PM JST] Garnet Gacha (Round Cut, 2.5mm) Cut by American lapidary artist KEN 《Bulk purchase discount available》
Sold out [On sale May 3rd at 10 PM] Limited to 9 stones! Color-shifting amethyst gacha, including a 3.49ct konpeito cut by Makoto Nakano (normally 22,800 yen) and a Sanje-cut stone. (Multiple purchase discount available)

[On sale May 3rd at 10 PM] Limited to 9 stones! Color-shifting amethyst gacha, including a 3.49ct konpeito cut by Makoto Nakano (normally 22,800 yen) and a Sanje-cut stone. (Multiple purchase discount available)
Sold out Bicolor Gacha including Brazilian parti-colored Paraiba tourmaline (CuO: 1.7%, MnO: 2.9%), bicolor sapphire, bicolor tourmaline, and specially cut bicolor fluorite, normally 79,800 JPY (multiple purchase discount available)

Bicolor Gacha including Brazilian parti-colored Paraiba tourmaline (CuO: 1.7%, MnO: 2.9%), bicolor sapphire, bicolor tourmaline, and specially cut bicolor fluorite, normally 79,800 JPY (multiple purchase discount available)
Sold out スリランカ産ヘソナイトガーネット 1.968ctルース

[On Sale May 2nd, 10 PM JST] Sri Lankan Hessonite Garnet 1.968ct Loose Stone
Sold out ナイジェリア産コバルトガーナイト 0.346ctルース 鑑別書

[Sales begin 5/6 10 PM JST] Nigerian Cobalt Garnet 0.346ct Loose Stone with Gemstone Identification Report
Sold out Pt950 アウイナイト 0.24ct・ダイヤモンド0.18ctリング 鑑別カード

[Available 5/18 10PM] [Colorful] Pt950 Hauyne 0.24ct / Diamond 0.18ct Ring with Certificate
Sold out トルコ産カラーチェンジダイアスポア 0.339ctルース

【Sale starts 10PM on May 9th】Turkish Color Change Diaspore 0.339ct Loose
Sold out ダイアスポア 0.757ctルース

[Sale on May 9th at 10 PM] Turkish Diaspore 0.757ct Loose Stone
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 1.374ctルース

[For sale May 23, 10 PM JST] Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 6.7mm/1.374ct Loose Stone
Sold out マダガスカル産アイオライトサンストーン 0.388ctルース

[On Sale May 10th, 10 PM] Madagascar Iolite Sunstone 0.388ct Loose Gemstone
Sold out アフガニスタン産ラピスラズリ 1.103ctルース

【Sales start May 10th, 10 PM JST】Afghanistan Lapis Lazuli 1.103ct 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.