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Sold out Tanzanian zircon, 1.672ct loose

Tanzanian zircon, 1.672ct loose
Sold out Myanmar color change zircon 0.439ct loose stone

Myanmar color change zircon 0.439ct loose stone
Sold out Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 4.8mm/0.612ct Loose

Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 4.8mm/0.612ct Loose
Sold out カラーチェンジジルコン 0.556ctルース

Burmese color-change zircon 0.556 ct loose

Sold out 0.092ct loose stone with iolite and phlogopite (phlogopite)

0.092ct loose stone with iolite and phlogopite (phlogopite)

Sold out Pink sapphire (with hematite) 0.271ct loose stone

Pink sapphire (with hematite) 0.271ct loose stone

Sold out Tanzanian Kornerupine (with Goethite) 2.6mm/0.068ct Loose

Tanzanian Kornerupine (with Goethite) 2.6mm/0.068ct Loose

Sold out [Sakura InCut] Synthetic Sapphire 2.610ct Loose Stone (Synthetic Pink Sapphire)

[Sakura InCut] Synthetic Sapphire 2.610ct Loose Stone (Synthetic Pink Sapphire)

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 Silky sapphire from Vietnam, 1.169ct loose stone

Silky sapphire from Vietnam, 1.169ct loose stone

Sold out Diamond rough (makeable) 0.353ct rough

Diamond rough (makeable) 0.353ct rough
Sold out Diamond rough (makeable) 0.279ct rough

Diamond rough (makeable) 0.279ct rough
Sold out Afghanistan Bicolor Beryl 9.100ct Loose Stone

Afghanistan Bicolor Beryl 9.100ct Loose Stone
Sold out Colombian emerald 10.940ct rough stone

Colombian emerald 10.940ct rough stone
Sold out 0.745ct loose bicolor sapphire from Windsor, Tanzania

0.745ct loose bicolor sapphire from Windsor, Tanzania

Sold out Sri Lankan Forsterite 0.231ct Loose Stone, Japan-German

Sri Lankan Forsterite 0.231ct Loose Stone, Japan-German

Sold out Sri Lankan Cobalt Spinel (Blue Spinel) 3.202ct Loose Stone (Needle-like Inclusions) Japan-German Rare Stone

Sri Lankan Cobalt Spinel (Blue Spinel) 3.202ct Loose Stone (Needle-like Inclusions) Japan-German Rare Stone

Sold out Pakistani Triplite 1.107ct Loose Stone

Pakistani Triplite 1.107ct Loose Stone
Sold out Congo Cobalt Calcite 7.5mm/1.791ct Loose Stone

Congo Cobalt Calcite 7.5mm/1.791ct Loose Stone
Sold out Australian boulder opal 15.004ct loose stone

Australian boulder opal 15.004ct loose stone
Sold out Australian boulder opal 6.152ct loose

Australian boulder opal 6.152ct loose

Sold out Oregon Sunstone from the United States, 8.338ct loose stone

Oregon Sunstone from the United States, 8.338ct loose stone
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 [Sakura Incut] Sphene from Madagascar 6.0mm/0.865ct Loose Stone

[Sakura Incut] Sphene from Madagascar 6.0mm/0.865ct Loose Stone
Sold out ブラジル産パライバトルマリン 0.065ctルース （CuO:2.0%、MnO:2.6%）

Brazilian Paraiba tourmaline 0.065ct loose (CuO:2.0%, MnO:2.6%)
Sold out 【22602044掲載】SV925 シーブルーカルセドニー ペンダントトップ（ネックレストップ）

SV925 Sea Blue Chalcedony x Onyx Pendant Top (Necklace Top) by Makoto Nakano
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） 0.639ctルース

Rainbow garnet (andradite garnet) 0.639ct loose from Tenkawa Village, Nara Prefecture
Sold out American oil-free red beryl 2.6mm/0.050ct loose GIA

American oil-free red beryl 2.6mm/0.050ct loose GIA
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 Colombian emerald rough stone 18.900ct (with pyrite)

Colombian emerald rough stone 18.900ct (with pyrite)
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 0.072 ct loose Bekily blue garnet (color-change garnet) from Madagascar

0.072 ct loose Bekily blue garnet (color-change garnet) from Madagascar
Sold out 0.076ct Loose Madagascar Bekily Blue Garnet (Color Change Garnet)

0.076ct Loose Madagascar Bekily Blue Garnet (Color Change Garnet)
Sold out Russian Alexandrite 2.4mm/0.061ct Loose Stone

Russian Alexandrite 2.4mm/0.061ct Loose Stone
Sold out Synthetic Alexandrite 2.046ct Loose

Synthetic Alexandrite 2.046ct Loose
Sold out Mexican Fire Opal 0.281ct Loose

Mexican Fire Opal 0.281ct Loose
Sold out 【12547478掲載】ヴァイオレットスピネル 0.776ctルース

Myanmar Violet Spinel 0.776ct Loose

Sold out メキシコ産ファイアオパール 0.564ctルース

Mexican Fire Opal 0.564ct Loose (Faceted Cut)

Sold out コロンビア産トラピッチェエメラルド（逆トラピッチェ） 0.457ct原石

Colombian trapiche emerald (reverse trapiche) 0.457ct rough stone

Sold out スリランカ産エンスタタイト 2.095ctルース

Enstatite from Sri Lanka 2.095ct loose Japanese-German edition

Sold out カンボジア産ブルージルコン（ラタナキリブルー） 0.615ctルース

Cambodian blue zircon (Ratanakiri blue) 0.615ct loose

Sold out Pakistani oil-in quartz 0.595ct loose

Pakistani oil-in quartz 0.595ct loose
Sold out 【さくらインカット】ラベンダークォーツ（スコロライト） 2.161ctルース

[Sakura in-cut] Lavender quartz (scorolite) 8mm/ 2.161ct loose
Sold out Andalusite 0.487ct loose

Andalusite 0.487ct loose

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.