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Vertical: 5.1 - 6.0mm

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Sold out ブラジル産パーティカラーパライバトルマリン 0.260ctルース

0.260ct Loose Parti-Color Paraiba Tourmaline from Brazil

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 ケニア産バイカラーグロッシュラーガーネット 0.479ctルース

Kenya Bi-color Grossular Garnet (Bi-color Tsavorite) 0.479ct Loose Stone
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 Myanmar Leuco Garnet 0.324ct loose stone

Myanmar Leuco Garnet 0.324ct loose stone
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 タンザナイト 0.580ctルース

Tanzanite 5mm/0.580ct loose stone (sugarloaf cut)
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） 0.581ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.581ct loose stone
Sold out ボリビア産フォスフォフィライト 0.300ctルース

Bolivian phosphophyllite, 0.300ct loose stone, with鑑別書

Sold out Australian black opal 0.232ct loose stone

Australian black opal 0.232ct loose stone

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 0.498ctルース

Australian rainbow lattice sunstone 0.498ct loose
Sold out Tanzanian UV Type Mint Garnet 0.440ct Loose Stone

Tanzanian UV Type Mint Garnet 0.440ct Loose Stone
Sold out 0.628ct Mozambican Rhodolite Garnet Loose Stone

0.628ct Mozambican Rhodolite Garnet Loose Stone
Sold out 0.522 ct Dumortierite in Quartz from Brazil, Loose

0.522 ct Dumortierite in Quartz from Brazil, 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 Mali Garnet (Grossular/Andradite Garnet) 0.675ct Loose Stone

Mali Garnet (Grossular/Andradite Garnet) 0.675ct Loose Stone
Sold out American Neptunite 0.290ct Loose Stone with Certificate of Authenticity

American Neptunite 0.290ct Loose Stone with Certificate of Authenticity
Sold out 【12562007掲載】スペイン産スファレライト 0.920ctルース

Spanish Sphalerite 5.6mm/0.920ct Loose Stone
Sold out 【12562005掲載】スペイン産スファレライト 0.878ctルース

Spanish Sphalerite 5.5mm/0.878ct Loose
Sold out 【12562004掲載】スペイン産スファレライト 0.903ctルース

Spanish Sphalerite 5.7mm/0.903ct Loose
Sold out 【12562003掲載】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） 1.207ctルース

Rainbow Garnet (Andradite Garnet) 1.207ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out 【12561989掲載】アメリカ産オレゴンサンストーン 0.793ctルース

Oregon Sunstone from the United States, 6.0mm/0.793ct loose stone
Sold out ブラジル産メデューサクォーツ（パライバクォーツ） 1.003ctルース

Brazil Medusa Dendritic Quartz 1.003ct Loose

Sold out 【12561932掲載】合成ルチル 0.877ctルース

Synthetic rutile 5.1mm/0.877ct loose stone
Sold out 【12561896掲載】ロンドンブルートパーズ 0.476ctルース

Brazilian London Blue Topaz 0.476ct Loose
Sold out タンザニア産ロードライトガーネット 0.704ctルース

0.704 ct loose Tanzanian rhodolite garnet
Sold out 【32501846掲載】ダイヤモンド 0.290ctルース(J, VS1)

0.290ct loose diamond (J, VS1, Ashoka cut)

Sold out カンボジア産ブルージルコン（ラタナキリブルー） 0.519ctルース

Cambodian Blue Zircon (Ratanakiri Blue) 0.519 ct Loose Gemstone
Sold out Synthetic Blue Sapphire 0.886ct Loose (Synthetic Sapphire)

Synthetic Blue Sapphire 0.886ct Loose (Synthetic Sapphire)
Sold out 【12561174掲載】メキシコ産ファイアオパール（ファセットカット） 0.517ctルース

Mexican fire opal (faceted cut) 5.9mm/0.517ct loose stone

Sold out 【12561129掲載】スリランカ産イエローサファイア 0.291ctルース

Sri Lankan Yellow Sapphire 0.291ct Loose
Sold out 【12561305掲載】アメリカ産オレゴンサンストーン 0.472ctルース

USA origin Oregon Sunstone 0.472ct Loose
Sold out [Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.638ct Loose

[Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.638ct Loose
Sold out Tanzanite from Tanzania 0.331ct loose stone

Tanzanite from Tanzania 0.331ct loose stone
Sold out Tanzanite 0.505ct loose stone from Tanzania

Tanzanite 0.505ct loose stone from Tanzania

Sold out Tanzanian Spessartine Garnet 1.168ct Loose Stone

Tanzanian Spessartine Garnet 1.168ct Loose Stone

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） 0.989ctルース

6.0mm/0.989ct Loose Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture
Sold out Pakistani Triplite 1.107ct Loose Stone

Pakistani Triplite 1.107ct Loose Stone
Sold out 【12552511掲載】ピンクダイヤモンド 0.296ctルース

Pink Diamond 0.296ct Loose (Cabochon Cut) Certificate of Authenticity
Sold out Mexican Fire Opal 0.281ct Loose

Mexican Fire Opal 0.281ct Loose
Sold out Brazilian Imperial Topaz, 0.353 ct loose stone

Brazilian Imperial Topaz, 0.353 ct loose stone
Sold out Tanzanite from Tanzania 0.417ct Loose Gemstone

Tanzanite from Tanzania 0.417ct Loose Gemstone
Sold out Anthill garnet from the USA (with forsterite) 0.578ct loose

Anthill garnet from the USA (with forsterite) 0.578ct loose

Sold out American Anthill Garnet 5.0mm/0.641ct Loose

American Anthill Garnet 5.0mm/0.641ct Loose
Sold out Cambodian Blue Zircon (Ratanakiri Blue) 0.537ct Loose

Cambodian Blue Zircon (Ratanakiri Blue) 0.537ct Loose
Sold out Tanzanian Mandarin Garnet Loose Stone 0.315ct

Tanzanian Mandarin Garnet Loose Stone 0.315ct

Sold out Mexican fire opal 0.235ct loose (facet cut)

Mexican fire opal 0.235ct loose (facet cut)

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.