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Sold out Tanzanian Bicolor Tanzanite 0.419 ct Loose Stone

Tanzanian Bicolor Tanzanite 0.419 ct Loose Stone
Sold out Synthetic Cobalt Spinel 0.466ct Loose

Synthetic Cobalt Spinel 0.466ct Loose
Sold out ブラジル産インディゴライトトルマリン 0.105ctルース

[On sale May 5th at 10 PM JST] Brazilian Indicolite Tourmaline 0.105ct Loose Stone with Appraisal Report
Sold out 【32501804掲載】ダイヤモンド 0.185ctルース(I, SI1)

Diamond 0.185ct Loose Stone (I, SI1, Ashoka Cut)
Sold out [Sakura Shape] Synthetic Sapphire 3.285ct Loose Stone

[Sakura Shape] Synthetic Sapphire 3.285ct Loose Stone
Sold out 【Sakura Shape】Oregon Sunstone 1.174ct Loose

【Sakura Shape】Oregon Sunstone 1.174ct Loose
Sold out カンボジア産ブルージルコン 1.757ctルース

Cambodian Blue Zircon 1.757ct Loose
Sold out 【ゆきんこカット】合成サファイア 2.220ctルース（合成ブルーサファイア）

[Yukinko Cut] Synthetic Sapphire 2.220ct Loose (Synthetic Blue Sapphire)
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 Diamond 0.320ct loose (D, VS2)

Diamond 0.320ct loose (D, VS2)
Sold out Myanmar Leuco Garnet 0.324ct loose stone

Myanmar Leuco Garnet 0.324ct 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 メデューサクォーツ（パライバクォーツ） 1.975ctルース

Brazilian Medusa Quartz (Paraiba Quartz) 1.975ct 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)
Sold out 【12562400掲載】メキシコ産オパール 0.265ctルース

[Cat Cut] Mexican Opal 0.265ct Loose Stone
Sold out 【12562398掲載】メキシコ産ファイアオパール 0.291ctルース

【Cat Cut】Mexican Fire Opal Loose Stone 0.291ct
Sold out 【12562113掲載】カラーシフトアメジスト 3.128ctルース

Brazilian Color-Shift Amethyst 3.128ct Loose Stone
Sold out Brazilian Color Change Amethyst 1.998ct Loose

Brazilian Color Change Amethyst 1.998ct Loose
Sold out 【12562099掲載】インド産アイオライトサンストーン 0.920ctルース

Indian Iolite Sunstone 0.920ct Loose Stone
Sold out Synthetic Cobalt Spinel 1.342ct Loose Stone with Certificate

Synthetic Cobalt Spinel 1.342ct Loose Stone with Certificate
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 【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 【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

[On sale May 13th at 10 PM] Tanzanian Rhodolite Garnet 0.704ct Loose Stone
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 0.092ct loose stone with iolite and phlogopite (phlogopite)

0.092ct loose stone with iolite and phlogopite (phlogopite)

Sold out [Yukinko Cut] Synthetic Sapphire 2.102ct Loose Stone

[Yukinko Cut] Synthetic Sapphire 2.102ct Loose Stone

Sold out [Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 0.999ct Loose Stone

[Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 0.999ct Loose Stone

Sold out [Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 2.420ct Loose Stone

[Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 2.420ct Loose Stone

Sold out 【Yukinko Cut】 Siberian Blue Quartz (Synthetic Quartz) 2.503ct Loose

【Yukinko Cut】 Siberian Blue Quartz (Synthetic Quartz) 2.503ct Loose

Sold out [Sakura Shape] Oregon Sunstone from the United States, 1.224ct Loose

[Sakura Shape] Oregon Sunstone from the United States, 1.224ct Loose
Sold out Sri Lankan moonstone 7.2mm/1.342ct loose gemstone

Sri Lankan moonstone 7.2mm/1.342ct loose gemstone
Sold out Sri Lankan Moonstone 1.487ct Loose

Sri Lankan Moonstone 1.487ct Loose
Sold out 0.099ct Loose Grandidierite from Madagascar

0.099ct Loose Grandidierite from Madagascar
Sold out Afghan Kunzite 0.606ct Loose Stone

Afghan Kunzite 0.606ct Loose Stone
Sold out Brazilian Imperial Topaz, 0.353 ct loose stone

Brazilian Imperial Topaz, 0.353 ct loose stone
Sold out 0.933 ct loose Brazilian aventurine beryl

0.933 ct loose Brazilian aventurine beryl
Sold out Brazilian Dumortierite in Quartz 1.516ct Loose Gemstone

Brazilian Dumortierite in Quartz 1.516ct Loose Gemstone
Sold out [Koshu Precious Stones plusthree] Brazilian Garden Quartz 47.809ct Loose

[Koshu Precious Stones plusthree] Brazilian Garden Quartz 47.809ct Loose

Sold out Hessonite Garnet from Sri Lanka 0.681ct Loose

Hessonite Garnet from Sri Lanka 0.681ct Loose
Sold out Kunzite from Afghanistan 0.971ct loose stone

Kunzite from Afghanistan 0.971ct loose stone
Sold out Tanzanian Mandarin Garnet Loose Stone 0.315ct

Tanzanian Mandarin Garnet Loose Stone 0.315ct

Sold out Afghan Kunzite 5.6mm/0.897ct Loose

Afghan Kunzite 5.6mm/0.897ct Loose
Sold out Loose Brazilian Medusa Quartz (Paraiba Quartz) 0.748ct

Loose Brazilian Medusa Quartz (Paraiba Quartz) 0.748ct
Sold out Brazilian Dumortierite in Quartz 1.736ct Loose

Brazilian Dumortierite in Quartz 1.736ct Loose
Sold out 0.848ct Loose Brazilian Medusa Quartz (Paraiba Quartz)

0.848ct Loose Brazilian Medusa Quartz (Paraiba Quartz)

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.