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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 [On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.206ct Loose Stone

[On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.206ct 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 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 コロンビア産エメラルドキャッツアイ 1.571ctルース

[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 Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification

Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification
Sold out Pt950 スイスブルートパーズ 3.5ct ペンダントトップ（ネックレストップ）鑑別書

[On Sale May 26th, 10 PM] Colorful Pt950 Swiss Blue Topaz 3.5ct Pendant Top (Necklace Top) with Appraisal Report

Sold out Pt900 ダイヤモンド 0.5ct リング

[Sale May 3rd, 10 PM] [Colorful] Pt900 Diamond 0.5ct Ring with Appraisal Report
Sold out Pt900 ピンクダイヤモンド 0.008ct ペンダント（ネックレス）

[On sale May 3rd, 10 PM] [Colorful] Pt900 Pink Diamond 0.008ct / Diamond 0.03ct Pendant (Necklace) 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 【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 Colombian emerald 0.153ct rough stone

Colombian emerald 0.153ct rough stone
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 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 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 [Sales start 10:00 PM on May 4th] Colombian non-oil emerald (NONE) 0.060ct loose GIA

[Sales start 10:00 PM on May 4th] Colombian non-oil emerald (NONE) 0.060ct loose GIA
Sold out Pt900 ダイヤモンド 0.50ct リング

[Sales begin May 18 at 10 PM JST] [Colorflee] Pt900 Diamond 0.50ct Ring
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） 0.656ctルース

【Sale from 10 PM on May 23】Nara Prefecture Tenkawa Village Rainbow Garnet (Andradite Garnet) 4.8mm/0.656ct 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 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
Sold out アフガニスタン産ラピスラズリ 3.279ctルース

[On Sale May 10th at 10 PM] Afghanistan Lapis Lazuli 9.7mm / 3.279ct Rose Cut Loose Stone
Sold out ダイヤモンド 0.141ctルース(E, VVS-2, EXCELLENT)

[Posted in 32501164] Diamond 0.141ct loose (E, VVS-2, EXCELLENT)
Sold out Flawless Diamond (H&C) 4.0mm/0.266ct Loose (D, FL, 3 Excellent H&C) GIA & Chuhokan

Flawless Diamond (H&C) 4.0mm/0.266ct Loose (D, FL, 3 Excellent H&C) GIA & Chuhokan
Sold out 【Sales start 10 PM, May 17th】《Limited 12 Gems》Win a Shimizu Kiseki Sakura In-cut Diamond! 💎 Tourmaline Gacha (plus a bonus Sanje Tourmaline)《Multiple Purchase Discount Available》

【Sales start 10 PM, May 17th】《Limited 12 Gems》Win a Shimizu Kiseki Sakura In-cut Diamond! 💎 Tourmaline Gacha (plus a bonus Sanje Tourmaline)《Multiple Purchase Discount Available》
Sold out [Sales start May 15, 10 PM] Limited to 11 Stones: Aquamarine Gacha with Certified Santa Maria Aquamarine (Multiple Purchase Discount Available)

[Sales start May 15, 10 PM] Limited to 11 Stones: Aquamarine Gacha with Certified Santa Maria Aquamarine (Multiple Purchase Discount Available)
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 タンザニア産パープルサファイア 0.677ctルース（カラーシフトタイプ）

[On sale May 15th at 10 PM] Tanzanian purple sapphire 0.677ct loose stone (color-shift type)
Sold out オーストラリア産ブラックオパール 0.522ctルース

[On sale May 24th at 10 PM] Australian Black Opal 0.522ct Loose Stone

Sold out ブラジル産ロンドンブルートパーズ 5.978ctルース

[On sale May 21st, 10 PM JST] Brazilian London Blue Topaz 5.978ct Loose Gemstone
Sold out 合成サファイア 2.348ctルース

【On Sale May 21st, 10 PM JST】Synthetic Sapphire 2.348 ct Loose Stone
Sold out スリランカ産ピンクスターサファイア 1.682ctルース

[On sale May 15, 10 PM JST] Sri Lankan Pink Star Sapphire, 1.682ct 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.