Round Cut

Yellow Sapphire 4.0mm/0.266ct Loose Sale price¥12,800

【12552125掲載】デトロイトシティ産ロードクロサイト 0.439ctルース

Detroit City Rhodochrosite 4mm/0.439ct Loose Stone Sale price¥8,800

American Herkimer Diamond 5.6mm/0.516ct Loose Sale price¥9,800

Tanzania Bicolor Zoisite 4mm/0.305ct Loose Stone Sale price¥6,980

American Benitoite 4.8mm/0.396ct Loose Stone by Nikkei Sale price¥298,000

イエローダイヤモンド 4mm/0.261ctルース(LIGHT YELLOW, VS-2, VeryGood)（セミオーダーメイドセット）

[Staff Selection] Yellow Diamond 4mm/0.261ct Loose (LIGHT YELLOW, VS-2, Very Good) (Semi-Custom Made Set) Sale price¥59,800

【スタッフセレクション】　【KEN氏】タンザニア産アイオライト 3.7mm/0.150ctルース（セミオーダーメイドセット）

[Staff Selection] [Mr. KEN] Tanzanian Iolite 3.7mm/0.150ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

【KEN氏】ブラジル産グリーントルマリン 5.2mm/0.584ctルース（セミオーダーメイドセット）

[Staff Selection] [Mr. KEN] Brazilian Green Tourmaline 5.2mm/0.584ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

[Staff Selection] [Mr. KEN] Tanzanian Iolite 5.5mm/0.589ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

Benitoite 1.8mm/0.025ct loose stone (colorless benitoite) Sale price¥12,800

Benitoite 1.8mm/0.025ct loose stone (colorless benitoite) Sale price¥15,800

Mica in Quartz 0.544ct Loose Stone Sale price¥6,980

American Herkimer Diamond (Rock Crystal) 5.5mm/0.534ct Loose Sale price¥8,800

American Herkimer Diamond (Rock Crystal) 5.3mm/0.594ct Loose Sale price¥8,800

Purple Spinel 4.8mm/0.422ct Loose Stone Sale price¥6,980

Pink spinel 5.2mm/0.573ct loose stone Sale price¥6,580

Purple spinel 4.5mm/0.365ct loose Sale price¥4,980

Pink spinel 4.3mm/0.342ct loose Sale price¥6,980

Pink spinel 3.8mm/0.192ct loose Sale price¥5,980

【12548939掲載】マダガスカル産ラズライトインクォーツ 1.600ctルース

Lazurite in quartz from Madagascar 7.5mm/1.600ct loose Sale price¥18,800

coming soon

[Listed on 12563962] Madagascar Padparadscha Sapphire 0.314 ct Loose Stone Sale price¥69,800

coming soon

[Item 12563910] Colombian Pyrite and Mica in Emerald, 0.360 ct Loose Stone Sale price¥29,800

Sold out

【Published on 12563872】Brazilian Rubellite 0.285ct Loose Stone

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[On sale July 31st at 10 PM] American Red Beryl 3.1mm/0.099ct Loose Stone with Certificate

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Goshenite 0.846ct loose stone

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[On sale July 28th at 10 PM] Madagascar Paparadscha Sapphire 4.0mm/0.305ct Loose Stone with Central Gem Lab Report

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Madagascar Bicolor Sapphire 0.506ct Loose

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[On sale July 20th, 10 PM JST] USA Oregon Sunstone 7.0mm/1.441ct Loose Gemstone

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Tanzanian Green Zoisite 0.375ct Loose Stone

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[Sale starts at 10 PM on July 13th] Spanish Sphalerite 6.1mm/1.197ct Loose

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【抽選販売0731_11】Diamond (H&C) 4.0mm/0.234ct Loose Stone (D, VVS-1, 3Excellent H&C)

coming soon

[Item 32501910] Internally Flawless Diamond (H&C) 0.206ct Loose (D, IF, 3Excellent H&C) Sale price¥89,800

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Madagascar Neon Blue Apatite 0.393ct Loose Stone [On sale July 12th at 10 PM]

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ミャンマー産グレースピネル（プラチナスピネル） 4.2mm/0.385ctルース

[On sale July 12th at 10 PM] Myanmar Gray Spinel (Platinum Spinel) 4.2mm/0.385ct Loose Stone

coming soon

[Lottery Sale 0731_02] Italian Leucite 4.0mm/0.209ct Loose Stone Sale price¥39,800

Sold out

[On sale July 15th at 10 PM] American Oregon Sunstone 7.0mm/1.389ct Loose Stone

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【さくらインカット】コンゴ産ピンクトルマリン 6.6mm/0.819ctルース鑑別書

[Sakura Incut] Congolese Pink Tourmaline 6.6mm/0.819ct Loose with Certificate

Sold out

[12563393 listed] Tanzanian Red Spinel 0.098ct Loose Stone

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[Lottery Sale 0409_04] Burmese Taaffeite 3.0mm/0.128ct Loose Stone with Appraisal

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【Lottery Sale 0409_01】Myanmar Taaffeite 3.3mm/0.152ct Loose Stone with Certificate

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[On sale July 4th at 10 PM] Diamond 3.7mm/0.197ct Loose (K, VS-2, VeryGood)

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Paraiba tourmaline from Brazil 0.056ct loose

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[On sale July 4, 10 PM] Burmese Ruby 3.1mm/0.120ct Loose Stone with Certificate

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[On sale July 5th at 10 PM JST] Madagascar Grandidierite 2.8mm/0.086ct Loose Stone with Certification

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[On sale July 5th at 10 PM JST] Madagascar Padparadscha Sapphire 3.5mm/0.206ct Loose Gemstone (with Central Gem Lab certificate)

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Benitoite from the USA, 3.1mm/0.129ct loose stone, with a certificate of authenticity.

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インターナリーフローレスダイヤモンド 0.217ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA

Sold out

フローレスダイヤモンド（H&C） 0.290ctルース(D, FL, 3Excellent H&C)

【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab

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.