Less than 0.5 ct

Sold out

0.430ct Unheated Sapphire Loose Stone from Kashmir

Sold out

Mexican Fire Opal 0.244ct Loose Stone (Contraluz Opal)

coming soon

【12555695掲載】ブラジル産パライバトルマリンインクォーツ 0.313ctルース

Brazilian Paraiba Tourmaline In Quartz 0.50mm/.313ct Loose Sale price¥15,800

Sold out

Zimbabwean Bicolor Euclase 0.132ct Loose Stone

Sold out

Bicolored Euclase from Zimbabwe 2.9mm/0.102ct Loose

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

Iolite Sunstone from India 0.472ct Loose Gemstone

Sold out

Canadian raw diamond (sawable) 0.328ct raw (with trigons)

Sold out

Ruby 0.289ct loose stone by Takakikyo

Sold out

Brazilian Dumortierite in Quartz 0.495ct loose stone

Sold out

Kenya Bi-color Grossular Garnet (Bi-color Tsavorite) 0.479ct Loose Stone

Sold out

Madagascar Iolite Sunstone 0.311ct Loose

Sold out

Russian Demantoid Garnet (Horsetail) 3.8mm/0.265ct Loose Stone

Sold out

[12560354] Zimbabwean Bicolor Euclase 0.206ct Loose Stone

Sold out

Myanmar Leuco Garnet 0.324ct loose stone

Sold out

Pakistan Veininite 0.150ct Loose Gemstone with Certificate

coming soon

0.239ct Loose Pink Sapphire from Madagascar, Japan/Germany Sale price¥49,800

Sold out

Colombian No-Oil Emerald 0.120ct Loose Stone GIA

Sold out

Cambodian Blue Zircon 0.348ct Loose Stone

Sold out

Vietnam unheated silky pink sapphire 0.178ct loose stone

Sold out

Sky blue topaz 0.428ct loose stone

Sold out

Untreated Pigeon Blood Ruby 0.440ct Loose AIGS

Sold out

Bolivian phosphophyllite, 0.300ct loose stone, with鑑別書

Sold out

Australian black opal 0.232ct loose stone

Sold out

Australian black opal 0.251ct loose stone

Sold out

Australian Black Opal 0.248ct Loose Stone

Sold out

Australian Black Opal 0.427ct Loose Stone

Sold out

Australian rainbow lattice sunstone 0.378ct loose

Sold out

Australian rainbow lattice sunstone 0.498ct loose

Sold out

Australian rainbow lattice sunstone 0.353ct loose

Sold out

[Cat Cut] Mexican Opal 0.265ct Loose Stone

Sold out

【Cat Cut】Mexican Fire Opal Loose Stone 0.291ct

Sold out

Brazilian Lazulite (blue spar) 0.030ct Loose with certificate

Sold out

Canadian Natrolite 5.0mm/0.355ct Loose Stone with Japan-Germany Gemological Report

Sold out

Canada Natrolite 0.370ct Loose Gemstone with Japan-Germany Certification

Sold out

Nifontovite from Mexico 0.151ct Loose Stone w/Japan-Germany Certificate

Sold out

Tanzanian UV Type Mint Garnet 0.440ct Loose Stone

Sold out

American Red Beryl 0.120ct Loose

Sold out

Cambodian blue zircon 0.267ct loose

Sold out

Montana Sapphire 0.235ct loose (yellow sapphire)

Sold out

Montana Sapphire 0.458ct Loose (Bi-Color Sapphire)

Sold out

Montana Sapphire 0.416ct Loose (Bi-Color Sapphire)

Sold out

ピンクダイヤモンド 0.073ルース(FANCY DEEP PURPLISH PINK, SI1)

Pink Diamond 0.073 Loose (FANCY DEEP PURPLISH PINK, SI1)

Sold out

Montana Sapphire 0.361ct loose (yellow sapphire)

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.