Round Cut

coming soon

【10/28 22時販売】マダガスカル産ブルーアパタイト 7.2mm/1.572ctルース Sale price¥8,800

【10/22 22時販売】インド産アイオライトサンストーン 0.228ctルース Sale price¥6,980

【10/25 22時販売】ブラジル産ルチルクォーツ（ルチルレイテッドクォーツ） 12mm/5.333ctルース Sale price¥9,800

【10/23 22時販売】ロシア産デマントイドガーネット（ホーステール認む） 3.8mm/0.255ctルース Sale price¥39,800

【10/23 22時販売】ブラジル産ブルートパーズ 5.5mm/0.754ctルース Sale price¥5,980

[10/12 22:00 Sale] Cassiterite 4.2mm/0.676ct Loose Stone with Certificate of Authenticity Sale price¥16,800

インターナリーダイヤモンド 0.25ルース(E, IF, 3Excellent) GIA

[On Sale at 10 PM on October 11th] Internal Diamond 4.1mm/0.250ct Loose (F, IF, 3 Excellent) GIA Sale price¥69,800

Pigeon Blood Ruby 0.290ct Loose Sale price¥59,800

Bicolor Zoisite 0.703ct Loose Stone Sale price¥12,800

Sold out

Bicolor Zoisite 0.745ct Loose Stone

[12560906] Russian Demantoid Garnet (Horsetail) 0.079ct Loose Stone Sale price¥12,800

[12560905] Russian Demantoid Garnet (Horsetail) 0.075ct Loose Stone Sale price¥12,800

[12560904] Russian Demantoid Garnet (Horsetail) 0.073ct Loose Stone Sale price¥14,800

[12560894] Greenland Ruby 0.220ct Loose Sale price¥39,800

[12560893] Greenland Ruby 0.210ct Loose Sale price¥45,800

[12560892] Greenland Ruby 0.134ct Loose Sale price¥25,800

[10/10 22:00 Sale] Brazilian Dalmatian Quartz 9.2mm/1.711ct Loose Stone Sale price¥9,800

[10/10 22:00 Sale] Mozambique Almandine Garnet 7.7mm/1.781ct Loose Stone Sale price¥18,800

[On Sale at 10 PM on October 9th] Tanzanian Dragon Garnet 5.0mm/0.767ct Loose Stone Sale price¥19,800

ダイヤモンド（H&C） 3.8mm/0.208ctルース(G, IF, 3Excellent H&C)

[On Sale at 10 PM on September 28th] 3.8mm/0.208ct Internally Flawless Diamond (H&C) Loose Stone (G, IF, 3 Excellent H&C) Sale price¥69,800

[On Sale at 10 PM on October 4th] Blue Sapphire 4.1mm/0.332ct Loose Sale price¥25,800

[On sale at 10pm on September 30th] Blue sapphire 0.291ct loose stone Sale price¥18,800

[On Sale at 10 PM on September 30th] Russian Chrome Diopside 1.365ct Loose Stone Sale price¥15,800

Tanzanian Bicolor Zoisite 1.006ct Loose Stone Sale price¥55,800

Tanzanian bicolor zoisite 1.327ct loose stone Sale price¥59,800

[September 20th, 10 PM Sale] Synthetic Alexandrite 5.7mm/0.827ct Loose Stone Sale price¥19,800

[On Sale at 10 PM on September 25th] Spanish Sphalerite 5.6mm/0.896ct Loose Stone Sale price¥14,800

[On Sale at 10 PM on September 25th] Spanish Sphalerite 5.7mm/0.955ct Loose Stone Sale price¥15,800

[On Sale at 10 PM on September 25th] Spanish Sphalerite 6.5mm/1.375ct Loose Stone Sale price¥19,800

タンザニア産アンデシン・ラブラドライト（通称名ブルームーンストーン） 0.726ctルース

[Available at 10 PM on September 9th] [Dandelion Cut] Tanzanian Andesine Labradorite (also known as Blue Moonstone) 6.0mm/0.726ct Loose Stone Sale price¥49,800

[On Sale at 10 PM on September 16th] Brazilian Indigolite Tourmaline 4.0mm/0.240ct Loose Stone with Certificate of Authenticity Sale price¥29,800

[Sold at 10 PM on September 19th] Blue Sapphire 4.0mm/0.314ct Loose Sale price¥112,800

[On Sale at 10 PM on September 19th] Tanzanian Dragon Garnet 0.829ct Loose Stone Sale price¥22,800

フローレスダイヤモンド（H&C） 0.266ctルース(D, FL, 3Excellent H&C)

[On Sale at 10 PM on September 6th] Flawless Diamond (H&C) 4.0mm/0.266ct Loose (D, FL, 3 Excellent H&C) GIA & Chuhokan Sale price¥188,000

[On Sale at 10 PM on August 31st] Paraiba Tourmaline from Mozambique, 3.5mm/0.172ct Loose Stone Sale price¥15,800

[On Sale at 10 PM on September 3rd] Paraiba Tourmaline from Mozambique, 3.2mm/0.119ct Loose Stone Sale price¥9,800

[On Sale at 10 PM on August 28th] Congo Pink Tourmaline 6.0mm/0.825ct Loose Stone Sale price¥29,800

[On Sale at 10 PM on September 5th] Congo Pink Tourmaline 5.9mm/0.798ct Loose Stone Sale price¥25,800

[On Sale at 10 PM on September 1st] Congo Pink Tourmaline 5.0mm/0.463ct Loose Stone Sale price¥24,800

[On Sale at 10 PM on September 6th] Brazilian Elestial Amethyst 7.6mm/1.461ct Loose Stone Sale price¥9,800

[On sale at 10pm on September 6th] Russian emerald 0.269ct loose stone Sale price¥79,800

Padparadscha sapphire 0.220ct loose stone Sale price¥34,800

Cornflower blue sapphire 0.490ct loose stone Sale price¥98,000

[12560244] Bicolor Zoisite 0.508ct Loose Stone Sale price¥7,980

[Available at 10 PM on August 24th] Colombian Mint Emerald 4.3mm/0.306ct Loose Stone Sale price¥8,800

[Available at 10 PM on August 24th] Brazilian Mint-Colored Emerald, 5.5mm/0.638ct Loose Sale price¥8,800

Padparadscha sapphire 0.200ct loose Sale price¥29,800

[Available at 10 PM on August 24th] Myanmar Leuco Garnet 4.0mm/0.371ct Loose Stone Sale price¥39,800

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.