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[On sale 6/6 at 10 PM] Limited to 6 Stones: Needle-Inclusion Blue Topaz Loose Stone (Avg. 16ct) - Multiple Purchase Discount Available

[On sale 6/6 at 10 PM] Limited to 6 Stones: Needle-Inclusion Blue Topaz Loose Stone (Avg. 16ct) - Multiple Purchase Discount Available Sale price¥4,980
[On sale June 8th, 10 PM JST] 《Limited to 4 stones》Needle-in-Blue Topaz Gacha💎Average 45ct《Multiple purchase discount available》

[On sale June 8th, 10 PM JST] 《Limited to 4 stones》Needle-in-Blue Topaz Gacha💎Average 45ct《Multiple purchase discount available》 Sale price¥9,800
[On Sale June 7th, 10 PM] Limited to 15 Stones: Afghan Pink Diaspore Single Stone Loose Gemstone (Avg. 0.3ct) - Multiple Purchase Discount Available

[On Sale June 7th, 10 PM] Limited to 15 Stones: Afghan Pink Diaspore Single Stone Loose Gemstone (Avg. 0.3ct) - Multiple Purchase Discount Available Sale price¥3,980
スカイブルートパーズ 1.719ctルース

Sky blue topaz 1.719ct loose stone Sale price¥8,800
ピンクトルマリン 0.862ctルース

Brazilian Pink Tourmaline 0.862ct Loose Stone Sale price¥12,800
ブラジル産ブルートルマリン 0.196ctルース

Brazilian Blue Tourmaline 0.196ct Loose Sale price¥6,980
グリーントルマリン 2.218ctルース

Brazilian Green Tourmaline 2.218ct Loose Sale price¥25,800
バイカラートルマリン 1.326ctルース

Brazilian Bicolor Tourmaline 7.2mm/1.326ct Loose Stone Sale price¥18,800
[On Sale June 13, 10 PM] [Limited to 2 Stones] Brown Diamond (4mm/0.3ct, with certificate) [Multiple Purchase Discount Available]

[On Sale June 13, 10 PM] [Limited to 2 Stones] Brown Diamond (4mm/0.3ct, with certificate) [Multiple Purchase Discount Available] Sale price¥5,980
[On Sale 10 PM, June 14th] Botswana Rough Diamond (Sawable) 0.090ct (Trigon)

[On Sale 10 PM, June 14th] Botswana Rough Diamond (Sawable) 0.090ct (Trigon) Sale price¥22,800
Pt900ベニトアイト0.152ct・ダイヤモンド0.58ctリング

[Sale on 6/8 at 10 PM] Pt900 Benitoite 0.152ct / Diamond 0.58ct Ring Sale price¥188,000
モザンビーク産ピンクトルマリン 2.944ctルース

[12550851] 2.944ct Mozambique pink tourmaline loose stone Sale price¥39,800
非加熱ブラジル産パライバトルマリン 0.065ctルース（CuO:1.6%、MnO:2.4%）

0.065ct loose Paraiba tourmaline from Brazil (CuO: 1.6%, MnO: 2.4%) Sale price¥49,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.110ct原石

South African diamond rough (sawable) 0.110ct rough Sale price¥22,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.085ct原石

South African diamond rough (sawable) 0.085ct rough Sale price¥15,800
デンドリティッククォーツ 4.587ctルース

Brazilian dendritic quartz 4.587ct loose stone Sale price¥9,800
ブラジル産ピンクトルマリン 0.470ctルース

Brazilian Pink Tourmaline 0.470ct Loose Stone Sale price¥9,800
ブラジル産ピンクトルマリン 0.968ctルース

Brazilian pink tourmaline 0.968ct loose stone Sale price¥18,800
ピンクトルマリン 0.558ctルース

Tanzanian pink tourmaline 0.558ct loose stone Sale price¥9,800
Bicolor Zoisite 1.100ct Loose Stone (Bicolor Tanzanite)

Bicolor Zoisite 1.100ct Loose Stone (Bicolor Tanzanite) Sale price¥18,800
ラベンダータンザナイト 0.784ctルース

Lavender Tanzanite 0.784ct loose stone Sale price¥12,800
スカイブルートパーズ 1.051ctルース

Sky blue topaz 1.051ct loose stone Sale price¥8,800
バイカラートルマリン 1.329ctルース

Bicolor tourmaline 1.329ct loose Sale price¥9,800
バイカラートルマリン 0.429ctルース

Bicolor tourmaline 0.429ct loose Sale price¥5,980
バイカラートルマリン 0.378ctルース

Bicolor Tourmaline 0.378ct Loose Stone (Hexagonal Cut) Sale price¥8,800
ピンクトルマリン 0.819ctルース

Pink tourmaline 0.819ct loose Sale price¥9,800
ピンクトルマリン 0.539ctルース

Pink tourmaline 0.539ct loose stone (heart shape) Sale price¥9,800
コロンビア産トラピッチェエメラルド 1.875ctルース

[On sale June 7th at 10 PM] Colombian Trapiche Emerald, 1.874ct Loose Stone, with Identification Report Sale price¥69,800
ロシア産デマントイドガーネット（ホーステール認む） 1.366ctルース

[Sales start June 5th, 10 PM] Russian Demantoid Garnet (horsetail inclusion visible) 6.8mm/1.366ct Loose Stone with Appraisal Report Sale price¥398,000
ロシア産デマントイドガーネット（ホーステール認む） 1.589ctルース

[On sale June 5th at 10 PM] Russian Demantoid Garnet (Horsetail inclusion confirmed) 6.9mm/1.589ct Loose Stone with Appraisal Report Sale price¥458,000
ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 7.682ctルース

[On sale 10 PM, June 6] Brazil Tinkerbell Quartz (Pink Fire Quartz) 7.682ct Loose Stone Sale price¥15,800
ピンクダイヤモンド 0.030ctルース(FANCY PURPLISH PINK, SI-1)

[On Sale 6/5 at 10 PM] Pink Diamond 1.95mm/0.030ct Loose Stone (FANCY PURPLISH PINK, SI-1) Central Gem Lab Sale price¥59,800
パープルダイヤモンド 0.048ctルース(FANCY VIVID PINK PURPLE, SI-1)

[On sale June 5th at 10 PM] Purple Diamond 0.048ct Loose Stone (FANCY VIVID PINK PURPLE, SI-1) CGL Sale price¥198,000
ロシア産デマントイドガーネット（ホーステール認む） 0.876ctルース

[On sale 6/5 at 10 PM] Russian Demantoid Garnet (horsetail inclusion visible) 5.8mm/0.876ct Loose Stone with Appraisal Report Sale price¥258,000
インターナリーフローレスダイヤモンド 0.320ctルース(G, IF, 3Excellent)

[On Sale May 31st at 10 PM] Internally Flawless Diamond 4.4mm/0.320ct Loose (G, IF, 3Excellent) GIA Sale price¥89,800
K18WG クロムトルマリン 0.70ctct・サファイア0.30ctペンダントトップ（ネックレストップ） 鑑別書

[On sale 10 PM on 6/14] [Colorful] K18WG Chrome Tourmaline 0.70ct / Sapphire 0.30ct Pendant Top (Necklace Top) with appraisal Sale price¥79,800
ブラジル産パライバトルマリン 0.239ctルース

【Sale starts May 28th at 10 PM JST】Brazilian Paraiba Tourmaline Loose Stone 0.239ct (CuO: 0.8%, MnO: 3.7%) Sale price¥45,800
ブラジル産パライバトルマリン 3.1mm/0.151ctルース（CuO:1.1%、MnO:3.8%）

[On sale May 28th, 10 PM JST] Brazilian Paraiba Tourmaline 3.1mm/0.151ct Loose Stone (CuO: 1.1%, MnO: 3.8%) Sale price¥29,800
ブラジル産パライバトルマリン 0.265ctルース（CuO:0.7%、MnO:3.0%）

[On sale May 28, 10 PM JST] Brazilian Paraiba Tourmaline 0.265ct Loose Stone (CuO: 0.7%, MnO: 3.0%) Sale price¥29,800
ブラジル産パライバトルマリン 0.205ctルース（CuO:0.8%、MnO:3.1%）

【Sale starts May 28th at 10 PM JST】Brazilian Paraiba Tourmaline 0.205ct Loose Stone (CuO: 0.8%, MnO: 3.1%) Sale price¥39,800
ブラジル産パライバトルマリン 0.211ctルース（CuO:0.6%,MnO:3.1%）

[On sale May 28 at 10 PM] Brazilian Paraiba Tourmaline 0.211ct Loose Stone (CuO:0.6%, MnO:3.1%) Sale price¥39,800
ブルーウォーターメロントルマリン 6.815ctルース

Blue watermelon tourmaline 6.815ct loose Sale price¥49,800
Loose Paraiba Tourmaline from Brazil, 0.059ct (CuO: 1.4%, MnO: 2.7%)

Loose Paraiba Tourmaline from Brazil, 0.059ct (CuO: 1.4%, MnO: 2.7%) Sale price¥45,800
Brazilian Paraiba Tourmaline 0.065ct Loose Stone (CuO: 2.0%, MnO: 2.4%)

Brazilian Paraiba Tourmaline 0.065ct Loose Stone (CuO: 2.0%, MnO: 2.4%) Sale price¥49,800
0.066ct loose Brazilian Paraiba Tourmaline (CuO: 1.5%, MnO: 2.2%)

0.066ct loose Brazilian Paraiba Tourmaline (CuO: 1.5%, MnO: 2.2%) Sale price¥45,800
Paraiba Tourmaline from Brazil, 0.063 ct, loose (CuO: 1.8%, MnO: 2.4%)

Paraiba Tourmaline from Brazil, 0.063 ct, loose (CuO: 1.8%, MnO: 2.4%) Sale price¥55,800
Loose 0.061ct Brazilian Paraiba Tourmaline (CuO: 1.7%, MnO: 2.2%)

Loose 0.061ct Brazilian Paraiba Tourmaline (CuO: 1.7%, MnO: 2.2%) Sale price¥49,800
Brazilian Paraiba Tourmaline 0.055ct Loose (CuO:1.9%, MnO:2.2%)

Brazilian Paraiba Tourmaline 0.055ct Loose (CuO:1.9%, MnO:2.2%) Sale price¥45,800

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.