Login
誕生石一覧

Birthstone list

Sort by
Bekily Blue Garnet (Color Change Garnet) from Madagascar 0.230ct Loose Gemstone

Bekily Blue Garnet (Color Change Garnet) from Madagascar 0.230ct Loose Gemstone Sale price¥18,800
Madagascar Bekily Blue Garnet (Color Change Garnet) 0.257ct Loose Stone

Madagascar Bekily Blue Garnet (Color Change Garnet) 0.257ct Loose Stone Sale price¥25,800
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） 0.368ctルース

[On sale May 6th, 10 PM JST] Brazilian unheated Imperial Topaz (Sherry Color) 0.368ct loose gemstone Sale price¥25,800
【12562795掲載】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） 0.314ctルース

Unheated Brazilian Imperial Topaz (Sherry Color) 0.314ct Loose Sale price¥22,800
[On Sale 5/2 at 10 PM JST] Mozambique Almandine Garnet 17.770ct Loose Stone

[On Sale 5/2 at 10 PM JST] Mozambique Almandine Garnet 17.770ct Loose Stone Sale price¥98,000
Brazilian Indicolite Tourmaline 0.352ct Loose Stone with Certification

Brazilian Indicolite Tourmaline 0.352ct Loose Stone with Certification Sale price¥29,800
コロンビア産エメラルドキャッツアイ 0.689ctルース

[On Sale May 14th at 10 PM] Colombian Emerald 0.689ct Loose Stone Sale price¥18,800
Ruby 0.528ct Loose Stone with Gem Identification Report

Ruby 0.528ct Loose Stone with Gem Identification Report Sale price¥28,800
Mexican Cantera Opal 5.811 ct Loose Stone with Certificate

Mexican Cantera Opal 5.811 ct Loose Stone with Certificate Sale price¥29,800
【12562861掲載】メキシコ産カンテラオパール 7.520ctルース

Mexican Cantera Opal 7.520 ct Loose Stone with Appraisal Sale price¥24,800
【22602569掲載】【カラフリ】Pt900/K18 合成オパール 3.25ct ペンダントトップ（ネックレストップ）

[On Sale 5/5 at 10 PM] [Karafuri] Pt900/K18 Cresanbert/Kyocera Synthetic Opal 3.25ct and Diamond 0.25ct Pendant Top Sale price¥69,800
K18 合成オパール ペンダントトップ（ネックレストップ）鑑別書

[Sale on May 26th at 10 PM] [Colorfri] K18 Synthetic Opal Pendant Top (Necklace Top) with Certificate of Authenticity Sale price¥39,800
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 Sale price¥29,800
Pt900 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） 0.5ct ペンダントトップ（ネックレストップ）

[Sale on May 14 at 10 PM] [Colorful] Pt900 Andesine/Labradorite (commonly known as Rainbow Moonstone) 0.5ct Pendant Top (Necklace Top) with Identification Report Sale price¥18,800
K18 ルビー 0.33ct ペンダントトップ（ネックレストップ）

[Sale on May 17th at 10 PM] [Colorful] K18 Ruby 0.33ct and Diamond Pendant Top (Necklace Top) with Certificate of Authenticity Sale price¥69,800
K18WG イエローサファイア 0.05ct ペンダントトップ（ネックレストップ）

[Calafuri] K18WG Yellow Sapphire 0.05ct Pendant Top (Necklace Top) Sale price¥79,800
【22602580掲載】【カラフリ】K18 ファイアオパール リング

[Sales on May 5th at 10 PM] [Karafuri] K18 Fire Opal Ring with Certificate Sale price¥49,800
Pt900 アイスブルーダイヤモンド（トリートメント） 1.00ct リング

[On sale May 6th, 10 PM JST] [Colorfury] Pt900 Ice Blue Diamond (Treated) 1.00ct Ring Sale price¥298,000
[Sale May 3rd, 10 PM] [Colorful] Pt900 Diamond 0.5ct Ring with Appraisal Report

[Sale May 3rd, 10 PM] [Colorful] Pt900 Diamond 0.5ct Ring with Appraisal Report Sale price¥59,800
[Sales Start: May 3rd, 10 PM JST] [Colorflee] Pt900 Lab-Grown Ruby 1.61ct / Diamond 0.25ct Ring (Central Gem Lab Certified)

[Sales Start: May 3rd, 10 PM JST] [Colorflee] Pt900 Lab-Grown Ruby 1.61ct / Diamond 0.25ct Ring (Central Gem Lab Certified) Sale price¥98,000
Pt900 オパール 2.61ct・ダイヤモンド0.858ctリング

[On Sale May 6, 10 PM JST] [Colorfley] Pt900 Opal 2.61ct / Diamond 0.858ct Ring Sale price¥168,000
【22602588掲載】【カラフリ】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 Sale price¥39,800
【32501891掲載】ダイヤモンド 0.207ctルース(F, VS-1, Excellent)

[On sale May 3rd, 10 PM JST] Loose Diamond 3.8mm/0.207ct (F, VS-1, Excellent) Sale price¥35,800
ダイヤモンド 0.216ctルース(G, VS-1, Excellent)

[On Sale May 14th, 10 PM] Diamond 3.8mm/0.216ct Loose (G, VS-1, Excellent) Sale price¥49,800
ダイヤモンド 0.211ctルース(E, VS-2, Excellent)

[On sale May 27th at 10 PM] Diamond 3.8mm/0.211ct Loose (E, VS-2, Excellent) Sale price¥49,800
【32501896掲載】ダイヤモンド 0.167ctルース(D, VVS-2, VeryGood)

[Sale on May 3rd, 10 PM JST] Diamond 3.5mm/0.167ct Loose Stone (D, VVS-2, VeryGood) Sale price¥37,800
ダイヤモンド 0.197ctルース(E, VVS-1, VeryGood)

[On sale 5/27 10 PM] Diamond 3.8mm/0.197ct Loose (E, VVS-1, VeryGood) Sale price¥39,800
【32501899掲載】ダイヤモンド 0.167ctルース(G, VS-1, VeryGood)

[On sale May 3 at 10 PM] Diamond 3.5mm/0.167ct Loose Stone (G, VS-1, Very Good) Sale price¥29,800
【12562847掲載】カンテラオパール 17.284ctルース

Mexican Cantera Opal 17.284ct Loose Sale price¥39,800
【22602562掲載】K18 アメジスト リング

[On sale May 2nd at 10 PM] K18 Amethyst Chain Ring Sale price¥18,800
【22602566掲載】K18 ペリドット リング

[On sale May 2nd at 10 PM JST] K18 Peridot Chain Ring Sale price¥22,800
【22602568掲載】K18 アクアマリン リング

[On sale May 2nd at 10 PM JST] K18 Aquamarine Chain Ring Sale price¥24,800
Colombian emerald 0.443ct rough stone

Colombian emerald 0.443ct rough stone Sale price¥8,800
Colombian emerald 0.499ct rough stone

Colombian emerald 0.499ct rough stone Sale price¥14,800
Colombian emerald 0.153ct rough stone

Colombian emerald 0.153ct rough stone Sale price¥6,980
バイカラータンザナイト 5.582ct原石

Bicolor Tanzanite 5.582ct rough stone Sale price¥18,800
バイカラータンザナイト 1.677ct原石

Bicolor Tanzanite 1.677ct rough stone Sale price¥7,980
Colombian Trapiche Emerald 0.422ct Loose

Colombian Trapiche Emerald 0.422ct Loose Sale price¥18,800
コロンビア産ミントカラーエメラルド 0.155ctルース

Colombian mint color emerald 0.155ct loose stone Sale price¥7,980
コロンビア産ミントカラーエメラルド 0.136ctルース

Colombian mint color emerald 0.136ct loose stone Sale price¥6,980
Diamond 3.7mm/0.318ct Loose (F, SI-1, Princess Cut)

Diamond 3.7mm/0.318ct Loose (F, SI-1, Princess Cut) Sale price¥49,800
【32501908掲載】ブラウンダイヤモンド 0.290ctルース(FANCY BROWN, SI-2)

Loose Brown Diamond 0.290ct (FANCY BROWN, SI-2) Sale price¥15,800
[On sale May 5 at 10 PM] Untreated Sri Lankan Sapphire (Glass Body/Sapphire Crystal) 142.434 ct Rough with Certification

[On sale May 5 at 10 PM] Untreated Sri Lankan Sapphire (Glass Body/Sapphire Crystal) 142.434 ct Rough with Certification Sale price¥1,280,000
[On Sale May 2 at 10 PM] Ruby 0.286ct Loose Gemstone with Identification Report

[On Sale May 2 at 10 PM] Ruby 0.286ct Loose Gemstone with Identification Report Sale price¥22,800
[On sale May 3rd at 10 PM] Pink Diamond 0.137ct Loose (FANCY DEEP BROWNISH PINK, I-1)

[On sale May 3rd at 10 PM] Pink Diamond 0.137ct Loose (FANCY DEEP BROWNISH PINK, I-1) Sale price¥29,800
【12562741掲載】オーストラリア産ボルダーオパール 8.029ctルース

【Sale from 10 PM on May 3】Australian Boulder Opal 8.020ct Loose Gemstone with Certificate Sale price¥69,800
[On sale 5/4 at 10 PM] Colombian bicolor emerald 0.274ct loose stone

[On sale 5/4 at 10 PM] Colombian bicolor emerald 0.274ct loose stone Sale price¥98,000
[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 Sale price¥89,800

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.