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Sold out スリランカ産ブルーサファイア 0.826ctルース

Sri Lankan Blue Sapphire 5.5mm/0.826ct Loose Stone
Sold out Tanzanian Rhodolite Garnet 0.410 ct Loose Stone

Tanzanian Rhodolite Garnet 0.410 ct Loose Stone
Sold out 《New Tucson Arrivals・Limited to 13 Stones》Pakistani Lazurite (Azure Stone) Loose Stone《Multiple Purchase Discount Available》

《New Tucson Arrivals・Limited to 13 Stones》Pakistani Lazurite (Azure Stone) Loose Stone《Multiple Purchase Discount Available》
Sold out 1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

1 stone loose quartz in oil from Pakistan《Discount available for multiple purchases》

Sold out 【12562650掲載】ペルー産バイカラーブルーオパール 4.862ctルース

Peruvian Bicolor Blue Opal 4.862ct Loose
Sold out ペルー産バイカラーブルーオパール 4.067ctルース

Peruvian Bicolor Blue Opal 4.067ct Loose Gemstone
Sold out 【12562647掲載】ペルー産バイカラーブルーオパール 3.757ctルース

Peruvian Bicolor Blue Opal 3.757ct Loose Stone

Sold out 【12562646掲載】ペルー産バイカラーブルーオパール 2.707ctルース

Peruvian Bi-Color Blue Opal 2.707ct Loose Stone

Sold out [Sales End Date: Tuesday, June 30] TV Anime "Dr. STONE" x KARATZ Jewelry Store Collaboration: Gemologist's Logo Loupe & Strap Set (with explanation card)

[Sales End Date: Tuesday, June 30] TV Anime "Dr. STONE" x KARATZ Jewelry Store Collaboration: Gemologist's Logo Loupe & Strap Set (with explanation card)

Sold out [Sales end on Tuesday, June 30] TV Anime "Dr. STONE" x KARATZ Jewelry Store Collaboration Mini Character Can Badge

[Sales end on Tuesday, June 30] TV Anime "Dr. STONE" x KARATZ Jewelry Store Collaboration Mini Character Can Badge

Sold out [Sales end Tuesday, June 30] TV Anime "Dr. STONE" x KARATZ Jewelry Store Collaboration Mini Character Acrylic Keychain

[Sales end Tuesday, June 30] TV Anime "Dr. STONE" x KARATZ Jewelry Store Collaboration Mini Character Acrylic Keychain

Sold out [Sales end on Tuesday, June 30] TV Anime "Dr. STONE" x Jewelry Store KARATZ Collaboration Mini Character Acrylic Stand

[Sales end on Tuesday, June 30] TV Anime "Dr. STONE" x Jewelry Store KARATZ Collaboration Mini Character Acrylic Stand

Sold out [Sales end Tuesday, June 30] TV Anime "Dr. STONE" x Jewelry Store KARATZ Collaboration Can Badge

[Sales end Tuesday, June 30] TV Anime "Dr. STONE" x Jewelry Store KARATZ Collaboration Can Badge

Sold out [Sales End on Tuesday, June 30] TV Anime "Dr.STONE" × KARATZ Jewelry Store Collaboration Acrylic Keychain

[Sales End on Tuesday, June 30] TV Anime "Dr.STONE" × KARATZ Jewelry Store Collaboration Acrylic Keychain

Sold out [Sales end on Tuesday, June 30] TV Anime "Dr. STONE" x KARATZ Jewelry Store Collaboration Acrylic Stand

[Sales end on Tuesday, June 30] TV Anime "Dr. STONE" x KARATZ Jewelry Store Collaboration Acrylic Stand

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） 0.463ctルース

0.463 ct Loose Madagascar Andesine-Labradorite (Common Name: Rainbow Moonstone)
Sold out マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.089ctルース

Bekily Blue Garnet from Madagascar (color change garnet) 0.089ct loose
Sold out インド産アイオライトサンストーン 0.472ctルース

Iolite Sunstone from India 0.472ct Loose Gemstone
Sold out Kochi Prefecture Blood Red Coral Loose (6-8mm / damaged by water pressure during retrieval) "Multiple purchase discount available"

Kochi Prefecture Blood Red Coral Loose (6-8mm / damaged by water pressure during retrieval) "Multiple purchase discount available"

Sold out Limited to 18 items: Deep-sea Coral Branch (raw wood), 1 stone (March birthstone, coral, average 18ct) (bulk purchase discount available)

Limited to 18 items: Deep-sea Coral Branch (raw wood), 1 stone (March birthstone, coral, average 18ct) (bulk purchase discount available)

Sold out 《Limited to 12 Stones》Kochi Prefecture Blood Coral Branch (Raw Coral) 1 Stone (March Birthstone, Coral, average 5.3ct)《Bulk Purchase Discount Available》

《Limited to 12 Stones》Kochi Prefecture Blood Coral Branch (Raw Coral) 1 Stone (March Birthstone, Coral, average 5.3ct)《Bulk Purchase Discount Available》

Sold out 《Limited to 4 stones》Kochi Prefecture Blood Red Coral Branch (Raw Wood) 1 stone (March birthstone, coral, average 7.2ct) 《Multiple purchase discount available》

《Limited to 4 stones》Kochi Prefecture Blood Red Coral Branch (Raw Wood) 1 stone (March birthstone, coral, average 7.2ct) 《Multiple purchase discount available》
Sold out 《Limited to 15 Stones》Fluorite Gacha including 2 Koshu-Kiseki-Kiriko stones (normally 49,800 yen) with 1 CC fluorite stone as a bonus《Multiple Purchase Discount Available》

《Limited to 15 Stones》Fluorite Gacha including 2 Koshu-Kiseki-Kiriko stones (normally 49,800 yen) with 1 CC fluorite stone as a bonus《Multiple Purchase Discount Available》
Sold out 《Limited to 15 Stones》Cordierite-Inclusive Cordierite Spinel Gacha, Equivalent to 59,800 Yen 《Bulk Purchase Discount Available》

《Limited to 15 Stones》Cordierite-Inclusive Cordierite Spinel Gacha, Equivalent to 59,800 Yen 《Bulk Purchase Discount Available》
Sold out 《Newly Arrived from Tucson・Limited to 15 Stones》Australian Black Opal Rough Stone (Lightning Ridge) 《Bulk Purchase Discount Available》

《Newly Arrived from Tucson・Limited to 15 Stones》Australian Black Opal Rough Stone (Lightning Ridge) 《Bulk Purchase Discount Available》
Sold out New Arrival from Tucson - Limited to 8 Stones: 1 Loose Australian Black Opal (Lightning Ridge Origin) - Multi-Purchase Discount Available

New Arrival from Tucson - Limited to 8 Stones: 1 Loose Australian Black Opal (Lightning Ridge Origin) - Multi-Purchase Discount Available
Sold out デュモルチェライトインクォーツ 0.495ctルース

Brazilian Dumortierite in Quartz 0.495ct loose stone

Sold out 【12562517掲載】スリランカ産非加熱スターサファイア 0.450ctルース

Unheated Sri Lankan Star Sapphire 0.450ct Loose Stone
Sold out 【12562512掲載】スリランカ産非加熱スターサファイア 0.692ctルース

Unheated Sri Lankan Star Sapphire Loose Stone 0.692ct
Sold out 【12562505掲載】モザンビーク産アクアマリン 0.888ctルース

0.888ct Loose Mozambique Aquamarine
Sold out マダガスカル産アイオライトサンストーン 0.311ctルース

Madagascar Iolite Sunstone 0.311ct Loose
Sold out マダガスカル産イエローサファイア 0.268ctルース

Yellow Zircon 0.268ct Loose

Sold out Big Gem Gacha 💎 including Dandelion Cut 15mm and Camellia Cut 19mm, normally 55,800 JPY《Multiple Purchase Discount Available》

Big Gem Gacha 💎 including Dandelion Cut 15mm and Camellia Cut 19mm, normally 55,800 JPY《Multiple Purchase Discount Available》
Sold out Zambian Canary Yellow Tourmaline (4.0mm/Round Cut) Loose Stone - Limited 5 Pieces (Multiple Purchase Discount Available)

Zambian Canary Yellow Tourmaline (4.0mm/Round Cut) Loose Stone - Limited 5 Pieces (Multiple Purchase Discount Available)
Sold out 《Limited to 10 stones》Plumeria cut carving (Peridot, Blue Topaz, Citrine, Rose Quartz) 1 stone 《Bulk purchase discount available》

《Limited to 10 stones》Plumeria cut carving (Peridot, Blue Topaz, Citrine, Rose Quartz) 1 stone 《Bulk purchase discount available》
Sold out Limited to 20 Pieces: Spanish Sphalerite Loose Stone (Average 0.50ct) - Volume Discount Available

Limited to 20 Pieces: Spanish Sphalerite Loose Stone (Average 0.50ct) - Volume Discount Available
Sold out アフガニスタン産インディゴライトトルマリン 1.729ctルース

Afghanistan indigolite tourmaline 1.729ct loose stone

Sold out メキシコ産ファイアオパール 1.104ctルース

Mexican Fire Opal 1.104ct Loose

Sold out サンストーン（イリュージョンサンストーン） 1.908ctルース

Sunstone (Illusion Sunstone) 1.908ct loose
Sold out オーストラリア産レインボーラティスサンストーン 0.865ctルース

Australian Rainbow Lattice Sunstone 0.865ct Loose
Sold out Limited 5 Stones: Synthetic Alexandrite Gacha (Princess Cut, 3.5-4.5mm) (Multi-Buy Discount Available)

Limited 5 Stones: Synthetic Alexandrite Gacha (Princess Cut, 3.5-4.5mm) (Multi-Buy Discount Available)
Sold out ブルージルコン 0.348ctルース

Cambodian Blue Zircon 0.348ct Loose Stone
Sold out ベトナム産非加熱シルキーピンクサファイア 0.178ctルース

Vietnam unheated silky pink sapphire 0.178ct loose stone
Sold out タンザニア産コーネルピンキャッツアイ 1.331ctルース

Tanzanian Kornerupine Cat's Eye 1.331ct Loose Stone
Sold out タンザナイト 0.580ctルース

Tanzanite 5mm/0.580ct loose stone (sugarloaf cut)
Sold out スカイブルートパーズ 0.428ctルース

Sky blue topaz 0.428ct loose stone
Sold out モスアゲート 0.795ctルース

Moss agate 0.795ct loose stone
Sold out 合成モアッサナイト 0.970ctルース

Synthetic Moissanite 0.970ct Loose Stone (Blue Moissanite)

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.