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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 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 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 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
coming soon 【12563029掲載】ブラジル産グリーントルマリン 1.319ctルース

[Lottery Sale 0531_09] Nigerian Mint Green Tourmaline 1.319ct Loose Stone with Certificate Sale price¥69,800
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 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 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 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 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 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 [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 [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 Diamond 3.8mm/0.319ct Loose (F, SI-1, Princess Cut)

Diamond 3.8mm/0.319ct Loose (F, SI-1, Princess Cut)
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 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 【22602567掲載】K18 シトリン リング

[On sale May 2nd at 10 PM] K18 Citrine 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 【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 【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 【12562843掲載】コーネルピン 0.700ctルース

Tanzanian Kornerupine 0.700ct Loose Stone
coming soon 【Lottery Sale 0530_04】Flawless Diamond (H&C) 4.2mm/0.280ct Loose (D, FL, 3Excellent H&C) GIA&CGL

【Lottery Sale 0530_04】Flawless Diamond (H&C) 4.2mm/0.280ct Loose (D, FL, 3Excellent H&C) GIA&CGL Sale price¥210,000
coming soon 【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab

【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab Sale price¥218,000
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 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 Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification

Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification
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 [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 【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 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
coming soon 【12562864掲載】コロンビア産トラピッチェエメラルド 4.185ctルース

【Lottery Sale 0531_12】Colombian Trapiche Emerald 4.185ct Loose Stone, Chuo (Central Gem Lab) Sale price¥158,000
Sold out カンボジア産ブルージルコン（ラタナキリブルー） 23.105ctルース 鑑別書

[On Sale May 5th at 10 PM] Cambodian Blue Zircon (Ratanakiri Blue) 23.105ct Loose Stone with Appraisal
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 Brazilian Swiss Blue Topaz 1.198ct Loose

Brazilian Swiss Blue Topaz 1.198ct 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 Madagascar Bekily Blue Garnet (Color Change Garnet) 0.221ct Loose Stone

Madagascar Bekily Blue Garnet (Color Change Garnet) 0.221ct Loose Stone
Sold out モザンビーク産パライバトルマリン 1.581ctルース

Paraiba tourmaline from Mozambique 1.581ct loose stone (CuO: 0.5%, MnO: 1.0%)
Sold out Brazilian Paraiba Tourmaline 0.216ct loose stone (CuO:1.2%, MnO:2.7%)

Brazilian Paraiba Tourmaline 0.216ct loose stone (CuO:1.2%, MnO:2.7%)
Sold out オレゴンサンストーン 0.390ctルース

Oregon sunstone 0.390ct loose
Sold out [On Sale 5/30 at 10 PM] "Limited 9 Stones" Blue Gem Gacha 💎 Brazilian Paraiba Tourmaline (CuO: 2.2%, MnO: 3.5%), Top Color Benitoite, Hauyne, Apatite (Multi-purchase discount available)

[On Sale 5/30 at 10 PM] "Limited 9 Stones" Blue Gem Gacha 💎 Brazilian Paraiba Tourmaline (CuO: 2.2%, MnO: 3.5%), Top Color Benitoite, Hauyne, Apatite (Multi-purchase discount available)
Sold out 《Limited to 10 Gems》DGL certified, pink sapphire gacha including a 0.155ct Padparadscha sapphire, plus a bonus sapphire such as a trillion cut! 《Multi-purchase discount available》

《Limited to 10 Gems》DGL certified, pink sapphire gacha including a 0.155ct Padparadscha sapphire, plus a bonus sapphire such as a trillion cut! 《Multi-purchase discount available》
Sold out Guatemalan Jade (with certificate, 3-3.5mm) - 1 Stone Loose - Limited to 10 Stones - Multiple Purchase Discount Available

Guatemalan Jade (with certificate, 3-3.5mm) - 1 Stone Loose - Limited to 10 Stones - Multiple Purchase Discount Available
Sold out フラワークォーツ 6.501ctルース

Brazilian Flower Quartz 6.501ct Loose Stone
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 クリストバライトインクォーツ 1.660ctルース

Cristobalite in Quartz 1.660ct Loose
Sold out オレゴンサンストーン 0.551ctルース

Oregon Sunstone 0.551ct loose
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 パープルスピネル 0.520ctルース

Purple spinel 0.520ct loose

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.