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Sold out シーライト 0.602ctルース

Sealight from Afghanistan 0.602ct loose
Sold out 《Limited to 16 stones》1 tanzanite stone (octagonal cut, 3.0mm)《Multiple purchase discount available》

《Limited to 16 stones》1 tanzanite stone (octagonal cut, 3.0mm)《Multiple purchase discount available》
Sold out Let's try the gem mining experience "Do-it-yourself gem excavation experience set" + bonus of fossil stickers and simple black light (more than 8 types of gems) (discounts available for multiple purchases)

Let's try the gem mining experience "Do-it-yourself gem excavation experience set" + bonus of fossil stickers and simple black light (more than 8 types of gems) (discounts available for multiple purchases)

Sold out カンボジア産ブルージルコン 0.675ctルース

Cambodian Blue Zircon 0.675ct Loose Stone

Sold out ブラジル産パライバトルマリン 0.169ctルース

Paraiba tourmaline from Brazil 3.3mm/0.169ct loose
Sold out ブラジル産パライバトルマリン 0.161ctルース

Paraiba tourmaline from Brazil 3.3mm/0.161ct loose
Sold out Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for beginners: Inca Rose/Fluorite 2 stone set)

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for beginners: Inca Rose/Fluorite 2 stone set)
Sold out Brazilian Paraiba Tourmaline (1.0mm, top quality)《Multiple purchase discount available》

Brazilian Paraiba Tourmaline (1.0mm, top quality)《Multiple purchase discount available》

Sold out アメリカ産ペリドット 1.353ctルース

American peridot 1.353ct loose
Sold out タンザニア産カイヤナイト 0.856ctルース

Tanzania Kyanite 0.856ct loose stone
Sold out 【猫カット】デンドリティッククォーツ 4.419ctルース

[Cat cut] Dendritic quartz 4.419ct loose
Sold out バイカラートルマリン 0.780ctルース

Bicolor tourmaline 0.780ct loose
Sold out グリーントルマリン 0.271ctルース

Green tourmaline 0.271ct 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 0.378ctルース

Australian rainbow lattice sunstone 0.378ct loose
Sold out ブルージルコン 0.267ctルース

Cambodian blue zircon 0.267ct loose

Sold out ウォーターメロントルマリン 3.403ctルース

Watermelon tourmaline 3.403ct loose
Sold out モンタナサファイア 0.235ctルース

Montana Sapphire 0.235ct loose (yellow sapphire)
Sold out Auinite 2.3mm/0.060ct loose

Auinite 2.3mm/0.060ct loose
Sold out アウイナイト 0.064ctルース

Auinite 2.4mm/0.064ct loose
Sold out モンタナサファイア 0.458ctルース

Montana Sapphire 0.458ct Loose (Bi-Color Sapphire)
Sold out モンタナサファイア 0.416ctルース

Montana Sapphire 0.416ct Loose (Bi-Color Sapphire)
Sold out モンタナサファイア 0.443ctルース

Montana Sapphire 0.443ct loose (green sapphire)
Sold out A single loose pink diamond, including a fancy pink diamond, normally priced at 39,800 yen (multiple purchase discounts available)

A single loose pink diamond, including a fancy pink diamond, normally priced at 39,800 yen (multiple purchase discounts available)

Sold out 《Limited to 15 stones》Topaz Gacha with Koshu Kiseki Kiriko 10ct (normally 69,800 yen) and sherry-colored Imperial Topaz included 《Multiple purchase discount available》

《Limited to 15 stones》Topaz Gacha with Koshu Kiseki Kiriko 10ct (normally 69,800 yen) and sherry-colored Imperial Topaz included 《Multiple purchase discount available》

Sold out Limited to 2 stones: Greenland Ruby, 1 stone, loose (2.2mm, top color, with certificate) (Multiple purchase discount available)

Limited to 2 stones: Greenland Ruby, 1 stone, loose (2.2mm, top color, with certificate) (Multiple purchase discount available)

Sold out 【12559023掲載】ブラジル産アベンチュリンベリル 0.621ctルース

Brazilian Aventurine Beryl 5.5mm/0.621ct Loose Stone
Sold out 【12562049掲載】オーストラリア産レインボーラティスサンストーン 0.373ctルース

Australian Rainbow Lattice Sunstone 0.373ct Loose

Sold out 【12561997掲載】メキシコ産ファイアオパール 1.461ctルース

Mexican Fire Opal 1.461ct Loose (Egg-in-Opal)

Sold out 【12561996掲載】メキシコ産ファイアオパール 1.260ctルース

Mexican Fire Opal 1.260ct Loose
Sold out Limited to 8 stones - New in Tucson - Canadian Eudialite (Round Cut, Approx. 2mm) - Multiple purchase discounts available

Limited to 8 stones - New in Tucson - Canadian Eudialite (Round Cut, Approx. 2mm) - Multiple purchase discounts available
Sold out Limited to 6 stones: Brazilian dendritic quartz (new to Tucson, average 2.5 carats) [Multiple purchase discounts available]

Limited to 6 stones: Brazilian dendritic quartz (new to Tucson, average 2.5 carats) [Multiple purchase discounts available]
Sold out [Available at 10 PM on January 24th] Limited to 18 stones: Golden Hill Turquoise from Kazakhstan (December birthstone, average 1.3 carats) [Multiple purchase discounts available]

[Available at 10 PM on January 24th] Limited to 18 stones: Golden Hill Turquoise from Kazakhstan (December birthstone, average 1.3 carats) [Multiple purchase discounts available]

Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.960ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 0.960ct 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 1.013ctルース

Australian Rainbow Lattice Sunstone 1.013ct 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 1.635ctルース

Australian Rainbow Lattice Sunstone 1.635ct Loose
Sold out Indian alexandrite cat's eye 0.679ct loose

Indian alexandrite cat's eye 0.679ct loose
Sold out Indian alexandrite cat's eye 0.422ct loose

Indian alexandrite cat's eye 0.422ct loose
Sold out カザフスタン産ストロベリークォーツ 0.803ctルース

Strawberry quartz from Kazakhstan 0.803ct loose
Sold out アフガニスタン産ハックマナイト 0.111ctルース

Afghanistan Hackmanite 0.111ct loose stone
Sold out ブラッドショットアイオライトサンストーン 1.250ctルース

Bloodshot Iolite Sunstone 1.250ct Loose
Sold out コッパールチルクォーツ 1.747ctルース

Copper rutilated quartz 1.747ct loose

Sold out 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） 3.089ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 3.089ct loose
Sold out バイカラートルマリン 0.974ctルース

Bicolor tourmaline 0.974ct loose
Sold out Colombian trapiche emerald (reverse trapiche) 3.0mm/0.107ct rough stone (faceted cut)

Colombian trapiche emerald (reverse trapiche) 3.0mm/0.107ct rough stone (faceted cut)
Sold out Bekily Blue Garnet from Madagascar (color change garnet) 0.163ct loose

Bekily Blue Garnet from Madagascar (color change garnet) 0.163ct loose
Sold out ベトナム産非加熱シルキーピンクサファイア 0.175ctルース

Unheated silky pink sapphire from Vietnam 0.175ct loose
Sold out Limited to 9 stones! Includes Koshu Kiriko plus three citrine gacha, normally priced at 29,800 yen. Discounts available for multiple purchases.

Limited to 9 stones! Includes Koshu Kiriko plus three citrine gacha, normally priced at 29,800 yen. Discounts available for multiple purchases.
Sold out Imperial Topaz Gacha: Win a Pink Imperial Topaz, normally priced at 69,800 yen (Multiple purchase discounts available)

Imperial Topaz Gacha: Win a Pink Imperial Topaz, normally priced at 69,800 yen (Multiple purchase discounts available)

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.