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マダガスカル産バイカラーサファイア 0.607ctルース

Madagascar Bi-color Sapphire 0.607ct Loose Stone Sale price¥14,800
マダガスカル産バイカラーサファイア 0.271ctルース

Madagascar bicolor sapphire 0.271ct loose stone Sale price¥6,980
coming soon [Lottery Sale_0612_01] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.542ct Loose

[Lottery Sale_0612_01] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.542ct Loose Sale price¥69,800
Sold out タンザニア産ゾイサイト 0.227ctルース

[12550864] 0.227ct loose zoisite from Tanzania
Sold out ロシア産ダイヤモンド原石（ソーヤブル） 0.117ctルース

Russian rough diamond (sawable) 0.117ct loose
Sold out ルベライト 0.410ctルース

Mozambique Rubellite 0.410ct Loose Stone
Sold out ナイジェリア産コバルトガーナイト 0.095ctルース

[On sale June 7th at 10 PM] Nigerian Cobalt Hauyne Loose Stone, 0.095ct, with AGL certificate
Sold out ナイジェリア産コバルトガーナイト 0.123ctルース

[On sale June 7th at 10 PM] Nigerian Cobalt Garnet 0.123ct Loose Stone with Gemstone Identification Report
Sold out マダガスカル産パパラチアサファイア 0.296ctルース

[On Sale June 6th at 10 PM] Madagascar Padparadscha Sapphire 3.9mm/0.296ct Loose Stone with DGL Certificate
Sold out スリランカ産コバルトスピネル 0.461ctルース

[Sale on June 7 at 10 PM] Sri Lankan Cobalt Spinel 4.7mm/0.461ct Loose Stone (Japan-Germany certified)
Sold out カシミール産非加熱サファイア 0.220ctルース

[Lottery Sale_0612_06] Unheated Kashmir Sapphire 0.220ct Loose Stone GIA

Sold out グリーンランド産タグトゥパイト 0.998ct原石

[On sale 6/7 10 PM JST] Greenland Tugtupite Rough 0.998 ct with Japanese and German certification
Sold out マラウイ産ムーンストーン（マラウイムーンストーン） 0.639ctルース

[On sale May 30th at 10 PM] Malawi Moonstone 0.639ct Loose
Sold out カシミール産サファイア 0.090ctルース

Kashmir Sapphire 2.5mm/0.090ct Loose Stone GIA

coming soon 【12563302掲載】カシミール産非加熱サファイア 0.100ctルース

[Lottery Sale 0531_04] Unheated Kashmir Sapphire 2.6mm/0.100ct Loose Stone GIA Sale price¥79,800
coming soon [Lottery Sale 0531_03] Unheated Kashmir Sapphire 2.7mm/0.090ct Loose GIA

[Lottery Sale 0531_03] Unheated Kashmir Sapphire 2.7mm/0.090ct Loose GIA Sale price¥59,800
Sold out ルビー 0.496ctルース

[Sale on June 12 at 10 PM] Ruby 0.496 ct Loose Stone (Hokikyō)
Sold out Andesine Labradorite from Madagascar (commonly known as Rainbow Moonstone) 0.826ct loose

Andesine Labradorite from Madagascar (commonly known as Rainbow Moonstone) 0.826ct loose
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） 0.971ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6.2mm/0.971ct Loose Stone
Sold out Benitoite 0.338ct loose stone

Benitoite 0.338ct loose stone
Sold out Spanish Andalusite 0.535ct loose stone

Spanish Andalusite 0.535ct loose stone
Sold out アフガニスタン産ハックマナイト 0.123ctルース

[Sale on June 4th at 10 PM JST] Afghan Hackmanite, 0.123ct Loose Stone
Sold out アフガニスタン産ハックマナイト 0.171ctルース

[On sale May 30th at 10 PM] Afghan Hackmanite 0.171ct Loose Stone
Sold out アフガニスタン産ハックマナイト 0.143ctルース

[On sale June 4th at 10 PM] Afghan Hackmanite 0.143ct Loose Stone
Sold out ケニア産ツァボライト 0.505ctルース

[On sale June 4th at 10 PM] Kenyan Tsavorite 0.505ct Loose Stone
Sold out ケニア産ツァボライト 0.386ctルース

[On sale May 30th at 10 PM] Kenyan Tsavorite 4.1mm/0.386ct Loose Stone
Sold out タンザニア産タンザナイト 0.328ctルース

【On sale May 30th at 10 PM JST】Tanzanian Tanzanite 0.328ct Loose Stone
Sold out ブラジル産シーフォームトルマリン 0.347ctルース

[Sale on 6/6 at 10 PM JST] Brazilian Seafoam Tourmaline 0.347 ct Loose Gemstone
Sold out パパラチアサファイア 0.177ctルース DGL鑑

[On sale May 27th at 10 PM JST] Madagascar Paparadscha Sapphire 0.177ct Loose Stone DGL Certified
Sold out マダガスカル産パパラチアサファイア 0.517ctルース DGL鑑

Madagascar Padparadscha Sapphire 0.517ct Loose DGL Certified
Sold out ルビー 0.187ctルース

[Sale on 5/27 at 10 PM] Mozambique Ruby 0.187 ct Loose Stone with Gemstone Report

Sold out マダガスカル産バイカラーサファイア 0.296ctルース

Madagascar Bicolor Sapphire 0.296ct Loose

Sold out コロンビア産エメラルド 0.167ctルース

Colombian emerald 0.167ct loose stone with jewel
Sold out コロンビア産パイライト・雲母インエメラルド 0.844ctルース

Colombian pyrite-mica emerald 0.844ct loose stone
Sold out 【12562862掲載】コロンビア産トラピッチェエメラルド 0.448ctルース

Colombian Trapiche Emerald, 0.446 ct, Loose Stone, with Certificate
Sold out Non-Oil Emerald 0.555ct Loose Stone by Nikkei

Non-Oil Emerald 0.555ct Loose Stone by Nikkei
Sold out 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） 0.404ctルース

Andesine Labradorite (also known as Rainbow Moonstone) 0.404ct loose stone
Sold out Pink tourmaline 0.795ct loose

Pink tourmaline 0.795ct loose
Sold out スペイン産アンダリュサイト 0.469ctルース

[On sale May 24, 10 PM JST] Spanish Andalusite 5.0mm/0.469ct Loose Stone

Sold out ブラジル産カシャライアメジスト 0.387ctルース

[On sale June 3rd, 10 PM JST] Brazilian Kasharaiya Amethyst 0.387ct Loose Stone
Sold out 中国・湖南省シンシャ（辰砂・シナバー） 0.882ctルース

[On sale 5/18 at 10 PM] Cinnabar from Hunan, China, 0.882 ct Loose Stone, with certification
Sold out 中国・湖南省シンシャ（辰砂・シナバー） 0.629ctルース

[Sales start 10 PM on May 22] Cinnabar (辰砂) from Hunan, China, 0.629 ct loose, with certificate
Sold out 中国・湖南省シンシャ（辰砂・シナバー） 0.469ctルース

[On sale May 17th at 10 PM] Chinese Hunan Cinnabar 0.469ct Loose Stone with Certificate of Authenticity
Sold out カシミール産非加熱サファイア 0.080ctルース

Kashmir unheated sapphire 2.6mm/0.09ct loose GIA

Sold out スリランカ産クリソベリルキャッツアイ 0.507ctルース

[On sale May 15th at 10 PM] Sri Lankan Chrysoberyl Cat's Eye 4.3mm/0.507ct 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.