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Sold out [Sale starts at 10 PM on June 14] Limited 1 Set! Beniotite 5-Stone Gradient Set (2.0mm, including top quality stone) [Bulk purchase discount available]

[Sale starts at 10 PM on June 14] Limited 1 Set! Beniotite 5-Stone Gradient Set (2.0mm, including top quality stone) [Bulk purchase discount available]
Sold out 【さくらインカット】コンゴ産ピンクトルマリン 7.0mm/1.056ctルース　鑑別書

[Sakura Ingot Cut] Pink Tourmaline from Congo 7.0mm/1.056ct Loose Stone with Certification

Sold out カンボジア産オレンジジルコン 3.800ctルース

[On sale June 20 at 10 PM] Cambodian orange zircon 3.800ct loose stone
Sold out K18PG ベニトアイト 0.03ct ペンダントトップ（ネックレストップ）

[Sale starts June 18th at 10 PM] [Colorful] K18PG Benitoite 0.03ct Ring with Certificate
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 ミャンマー産ジェダイスピネル 0.380ctルース

0.380ct Jedi spinel loose gemstone from Myanmar

Sold out ブラジル産インペリアルトパーズ 1.237ctルース 鑑別書

Brazilian Imperial Topaz 1.237 ct Loose Stone with Certificate of Authenticity [On Sale June 5th at 10 PM]
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

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 ブラウンダイヤモンド 0.600ctルース(FANCY LIGHT BROWN, SI-2)

Brown Diamond 5.3mm/0.600ct Loose Stone (FANCY LIGHT BROWN, SI-2)

Sold out グレーダイヤモンド 0.064ctルース(LIGHT BLUISH GRAY, SI-1)

Gray Diamond 2.5mm/0.064ct Loose (LIGHT BLUISH GRAY, SI-1) Rare Stone

Sold out グレーダイヤモンド 0.039ctルース(LIGHT BLUISH GRAY, VS-1)

Gray Diamond 2.1mm/0.039ct Loose (LIGHT BLUISH GRAY, VS-1)

Sold out モザンビーク産エルバイトトルマリン 1.793ctルース

Mozambique Elbaite Tourmaline 1.793ct Loose Stone

Sold out シトリン 5.121ctルース

[Koshu Precious Stones plusthree] Citrine 5.121ct 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 K14WG ブルーサファイア 0.22ctct ペンダント（ネックレス）

[ColorFleuri] K14WG Blue Sapphire 0.22ct Pendant (Necklace)
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 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 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 Diamond 3.8mm/0.319ct Loose (F, SI-1, Princess Cut)

Diamond 3.8mm/0.319ct Loose (F, SI-1, Princess Cut)
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 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 Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification

Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification
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 エチオピア産ハニカムオパール 3.566ctルース

Ethiopian honeycomb opal 3.566ct loose stone
Sold out 【甲州貴石切子plusthree】モルダバイト 1.511ctルース ワッペン付

[Koshu precious stone Kiriko plusthree] Moldavite 1.511ct loose with patch
Sold out 【12562579掲載】ナミビア産ジェレメジェバイト 0.355ctルース

Jeremejevite from Namibia 0.355ct Loose Stone with Certification
Sold out カメレオンダイヤモンド 0.153ctルース(LIGHT GRAY GREEN, SI-1)

Chameleon Diamond 0.153ct Loose (LIGHT GRAY GREEN, SI-1)
Sold out 【22602555掲載】K18 ターコイズ リング

K18 Turquoise Ring
Sold out K18 Red Coral from Kochi Prefecture (0.41ct), Diamond (0.03ct) Ring

K18 Red Coral from Kochi Prefecture (0.41ct), Diamond (0.03ct) Ring
Sold out 【22602551掲載】K18 血赤珊瑚 0.56ct リング

K18 Blood Coral from Kochi Prefecture (0.56ct), Diamond (0.08ct) Ring
Sold out Taaffeite from Myanmar 2.8mm/0.114ct Loose Gemstone with Certificate

Taaffeite from Myanmar 2.8mm/0.114ct Loose Gemstone with Certificate

Sold out [Sakura Cut] Mongolian Andesine 8.0mm/1.652ct Necklace

[Sakura Cut] Mongolian Andesine 8.0mm/1.652ct Necklace

Sold out 0.163 ct loose grandidierite from Madagascar

0.163 ct loose grandidierite from Madagascar
Sold out [Sakura Shape] Synthetic Sapphire 3.285ct Loose Stone

[Sakura Shape] Synthetic Sapphire 3.285ct Loose Stone
Sold out 【Sakura Shape】Oregon Sunstone 1.174ct Loose

【Sakura Shape】Oregon Sunstone 1.174ct Loose
Sold out 【ゆきんこカット】合成サファイア 2.220ctルース（合成ブルーサファイア）

[Yukinko Cut] Synthetic Sapphire 2.220ct Loose (Synthetic Blue Sapphire)
Sold out ブラジル産モルガナイト 7.339ctルース

Brazilian Morganite 7.339ct loose stone

Sold out Bolivian phosphophyllite 0.165ct loose stone with certificate

Bolivian phosphophyllite 0.165ct loose stone with certificate

Sold out [12560354] Zimbabwean Bicolor Euclase 0.206ct Loose Stone

[12560354] Zimbabwean Bicolor Euclase 0.206ct Loose Stone
Sold out ケニア産クロムトルマリン 0.501ctルース

Kenyan chrome tourmaline 0.501ct loose stone

Sold out 【12558576掲載】パキスタン産ヴェイリネナイト 0.150ctルース

Pakistan Veininite 0.150ct Loose Gemstone with Certificate
Sold out ブラウンダイヤモンド 0.554ctルース(UNDER S(LIGHT YELLOWISH BROWN), SI-2)

Brown Diamond 0.554 ct Loose (Color Distribution / LIGHT YELLOWISH BROWN, SI-2)

Sold out 【12562525掲載】オーストラリア産ブラックオパール 0.956ctルース

Australian Black Opal 0.956ct Loose Stone
Sold out オーストラリア産ブラックオパール 3.871ctルース

Australian black opal, 3.871 ct, 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.