Login
誕生石一覧

Birthstone list

Sort by
【12562806掲載】メキシコ産カンテラオパール 3.051ctルース

Mexican Cantera Opal 3.051ct Loose Stone Sale price¥18,800
メキシコ産カンテラオパール 7.207ctルース

[On sale May 6th at 10 PM JST] Mexican Cantera Opal Loose Stone 7.207ct Sale price¥25,800
メキシコ産カンテラオパール 5.410ctルース

Mexican Cantera Opal 5.410 ct Loose Stone Sale price¥9,800
【12562809掲載】メキシコ産カンテラオパール 7.619ctルース

Mexican Cantera Opal 7.619 ct Loose Stone Sale price¥25,800
【12562811掲載】メキシコ産カンテラオパール 10.379ctルース

Mexican Cantera Opal 10.379ct Loose Stone Sale price¥39,800
カメレオンダイヤモンド 0.128ctルース(FANCY LIGHT GRAY GREEN, SI-1)

[Sale on May 9, 10 PM JST] Chameleon Diamond 3.2mm/0.128ct Loose Stone (FANCY LIGHT GRAY GREEN, SI-1) Sale price¥31,800
カメレオンダイヤモンド 0.079ctルース(FANCY LIGHT GRAY GREEN, SI-1)

Green Diamond, Chameleon Diamond 0.079ct Loose Stone (FANCY LIGHT GRAY GREEN, SI-1) Sale price¥25,800
グレーダイヤモンド 2.8mm/0.089ctルース(LIGHT GRAY, SI-2)

Gray Diamond 2.8mm/0.089ct Loose (LIGHT GRAY, SI-2) Sale price¥16,800
【32501879掲載】グレーダイヤモンド 0.096ctルース(VERY LIGHT GRAY, SI-1)

Gray Diamond, 2.9mm/0.096ct Loose (VERY LIGHT GRAY, SI-1) Sale price¥15,800
[Karafuri] Pt900 Diamond 1.00ct Ring

[Karafuri] Pt900 Diamond 1.00ct Ring Sale price¥98,000
【Karafuri】Pt900 Cantera Opal 7.809ct and Diamond 0.19ct Pendant Top

【Karafuri】Pt900 Cantera Opal 7.809ct and Diamond 0.19ct Pendant Top Sale price¥110,000
Brazilian Bicolor Tourmaline 0.780ct Loose

Brazilian Bicolor Tourmaline 0.780ct Loose Sale price¥12,800
【12562839掲載】メキシコ産カンテラオパール 27.410ctルース

[On sale May 2nd at 10 PM JST] Mexican Cantera Opal 27.410ct Loose Stone Sale price¥25,800
【12562840掲載】メキシコ産カンテラオパール 32.560ctルース

[On sale at 10 PM on May 2nd] Mexican Cantera Opal 32.560ct Loose Stone Sale price¥29,800
0.308ct Unset Yellow Sapphire (Sri Lankan)

0.308ct Unset Yellow Sapphire (Sri Lankan) Sale price¥13,800
Tanzanian Rhodolite Garnet 5.9mm/1.084ct Loose

Tanzanian Rhodolite Garnet 5.9mm/1.084ct Loose Sale price¥12,800
GGG (Gadolinium Gallium Garnet) 3.046ct Loose Stone

GGG (Gadolinium Gallium Garnet) 3.046ct Loose Stone Sale price¥18,800
【12561173掲載】メキシコ産ファイアオパール（ファセットカット） 0.645ctルース

Mexican Fire Opal (faceted) 0.645ct Loose Stone Sale price¥18,800
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） 1.533ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 1.533ct loose Sale price¥6,980
Mexican Hyalite Opal 0.774ct Loose (Faceted Cut)

Mexican Hyalite Opal 0.774ct Loose (Faceted Cut) Sale price¥8,800
ピンクトルマリン 1.575ctルース

Pink tourmaline 1.575ct loose Sale price¥12,800
ピンクトルマリン 0.632ctルース

Pink tourmaline 0.632ct loose Sale price¥9,800
グリーントルマリン 0.559ctルース

Green tourmaline 0.559ct loose Sale price¥6,980
イエロートルマリン 0.277ctルース

Yellow tourmaline 0.277ct loose Sale price¥6,980
Mexican Fire Opal 0.290ct Loose (Faceted Cut)

Mexican Fire Opal 0.290ct Loose (Faceted Cut) Sale price¥6,980
ブラジル産インペリアルトパーズ 0.402ctルース

Brazilian Imperial Topaz 0.402ct Loose Stone Sale price¥9,800
ブラジル産インペリアルトパーズ 0.413ctルース

Brazilian Imperial Topaz 0.413ct Loose Stone Sale price¥9,800
オパール 1.694ctルース

Ethiopian Opal 1.694ct Loose Sale price¥7,980
オパール 2.131ctルース

Ethiopian Opal 2.131ct Loose Sale price¥9,800
エチオピア産ハニカムオパール 3.566ctルース

Ethiopian honeycomb opal 3.566ct loose stone Sale price¥46,800
コロンビア産エメラルド 0.345ctルース

Colombian emerald 0.345ct loose stone (silky type) Sale price¥15,800
ダイヤモンド 0.042ctルース

Diamond 0.042ct loose (VS class equivalent, emerald cut) Sale price¥6,980
イエローダイヤモンド 0.071ctルース(FANCY INTENSE ORANGEY YELLOW, SI2)

Fancy intense orangey yellow diamond 0.071ct loose stone (FANCY INTENSE ORANGEY YELLOW, SI2) Sale price¥22,800
ベトナム産非加熱シルキーピンクサファイア 0.580ctルース

Vietnam unheated silky pink sapphire 0.580ct loose stone Sale price¥12,800
Sapphire 0.461ct loose stone

Sapphire 0.461ct loose stone Sale price¥12,800
イエローサファイア 0.229ctルース

Yellow sapphire 0.229ct loose stone Sale price¥8,800
スリランカ産イルメナイトインスターサファイア 3.426ctルース

Sri Lankan Ilmenite in Star Sapphire 3.426ct loose stone (Ratnapura) Sale price¥49,800
【12562713掲載】ビルマ産ルビー 3.720ctルース

Burmese ruby 3.72ct loose GIA/CGL Sale price¥298,000
Benitoite 0.272ct loose stone (emerald cut)

Benitoite 0.272ct loose stone (emerald cut) Sale price¥248,000
モザンビーク産エルバイトトルマリン 1.574ctルース（CuO:0.1%,Mn0:3.1％）

Elbaite tourmaline from Mozambique 1.574ct loose stone (CuO: 0.1%, Mn0: 3.1%) Sale price¥55,800
モザンビーク産エルバイトトルマリン 1.456ctルース（CuO:0.1%,MnO:0.4%）

Elbaite tourmaline from Mozambique 1.456ct loose stone (CuO: 0.1%, MnO: 0.4%) Sale price¥45,800
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） 0.213ctルース

[Sale on May 18th at 10 PM] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.213ct Loose Stone Sale price¥22,800
0.186ct loose Bekily blue garnet (color-change garnet) from Madagascar

0.186ct loose Bekily blue garnet (color-change garnet) from Madagascar Sale price¥18,800
Madagascar Bekily Blue Garnet (Color Change Garnet) 0.188ct Loose Stone

Madagascar Bekily Blue Garnet (Color Change Garnet) 0.188ct Loose Stone Sale price¥18,800
[On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.206ct Loose Stone

[On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.206ct Loose Stone Sale price¥22,800
[On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.167ct Loose Stone

[On sale May 1st at 10 PM JST] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.167ct Loose Stone Sale price¥16,800
Bekily Blue Garnet (Color Change Garnet) from Madagascar 0.230ct Loose Gemstone

Bekily Blue Garnet (Color Change Garnet) from Madagascar 0.230ct Loose Gemstone Sale price¥18,800
Madagascar Bekily Blue Garnet (Color Change Garnet) 0.257ct Loose Stone

Madagascar Bekily Blue Garnet (Color Change Garnet) 0.257ct Loose Stone Sale price¥25,800

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.