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誕生石一覧

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Sold out ダイヤモンド原石（ソーヤブル） 0.101ct原石

Diamond rough (sawable) 0.101ct rough (with trigon)
Sold out ブラジル産アメジスト 4.961ctルース

Brazilian Amethyst 4.961ct Loose Stone
Sold out ブラジル産インディゴライトトルマリンインクォーツ 1.626ctルース

Brazilian Indigolite Tourmaline in Quartz 1.626ct Loose Stone
Sold out ブルーサファイア 0.329ctルース

Sri Lankan Blue Sapphire 4.0mm/0.329ct Loose Stone
Sold out ケニア産ツァボライト 0.257ctルース

Kenyan Tsavorite 3.9mm/0.257ct Loose Stone
coming soon [Colorfly] Pt900 Madagascar Sapphire 0.99ct Ring GIA

[Colorfly] Pt900 Madagascar Sapphire 0.99ct Ring GIA Sale price¥228,000
coming soon 【22602593掲載】【カラフリ】Pt900 ダイヤモンド 1.00ctct ペンダント（ネックレス）

[COLORFUL] Pt900 Diamond 1.00ct Pendant (Necklace) Sale price¥49,800
coming soon [On sale May 24th at 10 PM] "Limited to 12 Stones" Blue Gemstone Gacha 💎 Brazil Paraiba Tourmaline (CuO: 1.5%, MnO: 3.2%) and Zimbabwe Euclase, normally priced at ¥35,800, and more! (Multiple purchase discount available)

[On sale May 24th at 10 PM] "Limited to 12 Stones" Blue Gemstone Gacha 💎 Brazil Paraiba Tourmaline (CuO: 1.5%, MnO: 3.2%) and Zimbabwe Euclase, normally priced at ¥35,800, and more! (Multiple purchase discount available) Sale price¥3,980
coming soon [Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA

[Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA Sale price¥148,000
coming soon [Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA

[Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA Sale price¥98,000
coming soon 【12562959掲載】スリランカ産サファイアキャッツアイ 2.442ctルース

[Lottery Sale 0521_06] Sri Lankan Sapphire Cat's Eye Loose Stone 2.442ct Sale price¥75,800
Sold out [On sale May 10th at 10 PM] "Limited to 3 stones" Brazilian Paraiba Tourmaline (Cabochon Cut approx. 3.0mm) 1 Stone Loose Gemstone "Multiple purchase discount available"

[On sale May 10th at 10 PM] "Limited to 3 stones" Brazilian Paraiba Tourmaline (Cabochon Cut approx. 3.0mm) 1 Stone Loose Gemstone "Multiple purchase discount available"
coming soon 【12563029掲載】ブラジル産グリーントルマリン 1.319ctルース

[Lottery Sale 0531_09] Nigerian Mint Green Tourmaline 1.319ct Loose Stone with Certificate Sale price¥69,800
Sold out 【32501894掲載】ダイヤモンド 0.095ctルース(F, VS-2, Excellent)

Lottery Sale ① [For Winners Only] [Listed as 32501894] Diamond 3.0mm/0.095ct Loose Stone (F, VS-2, Excellent)

coming soon 【Lottery Sale 0530_04】Flawless Diamond (H&C) 4.2mm/0.280ct Loose (D, FL, 3Excellent H&C) GIA&CGL

【Lottery Sale 0530_04】Flawless Diamond (H&C) 4.2mm/0.280ct Loose (D, FL, 3Excellent H&C) GIA&CGL Sale price¥210,000
coming soon 【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab

【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab Sale price¥218,000
coming soon 【12562864掲載】コロンビア産トラピッチェエメラルド 4.185ctルース

【Lottery Sale 0531_12】Colombian Trapiche Emerald 4.185ct Loose Stone, Chuo (Central Gem Lab) Sale price¥158,000
Sold out 【12562799掲載】コロンビア産パイライトインエメラルド 2.780ctルース

Lottery Sale 13 [For Winners Only] [Listed on 12562799] Colombian Pyrite in Emerald 2.780ct Loose Rare Stone [Limited to 1] 198,000 yen 12562799

Sold out ブラジル産非加熱インペリアルトパーズ（シェリーカラー） 0.351ctルース

[On sale May 5th, 10 PM JST] Unheated Brazilian Imperial Topaz (Sherry Color) 0.351ct Loose Gemstone
Sold out アルマンディンガーネット 1.255ctルース

Almandine Garnet 1.255ct Loose Stone
Sold out Sky blue topaz 5.595ct loose

Sky blue topaz 5.595ct loose
Sold out 【12562823掲載】ブラジル産バイカラートルマリン 1.050ctルース

Brazilian bi-color tourmaline, 1.050 ct loose stone

coming soon [Lottery Sale 0531_14] Greenland Sapphire 1.258 ct Loose Stone with ChuBo & Analysis Data

[Lottery Sale 0531_14] Greenland Sapphire 1.258 ct Loose Stone with ChuBo & Analysis Data Sale price¥79,800
Sold out ブラジル産パライバトルマリン 0.49ctルース - KARATZ STORE｜カラッツSTORE

0.49ct loose Brazilian Paraiba Tourmaline (CuO:0.6%, Mn:0.1%)

Sold out ピンクダイヤモンド 0.067ctルース(FANCY INTENSE PURPLE PINK, I-1)

Pink diamond 0.067ct loose (FANCY INTENSE PURPLE PINK, I-1)

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） 0.056ctルース

0.056 ct loose Bekily blue garnet (color-change garnet) from Madagascar

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 ブラジル産パライバトルマリン 0.071ctルース

Paraiba Tourmaline from Brazil, 0.071ct loose (CuO:0.9% MnO:0.4%)

Sold out 【12562641掲載】マラウイ産ムーンストーン（マラウイムーンストーン） 4.198ctルース

Malawi Moonstone 4.198ct Loose Stone
Sold out 【32501858掲載】グレーダイヤモンド 0.141ctルース(FANCY GRAY, I-1)

Loose Gray Diamond 0.141ct (FANCY GRAY, I-1)
Sold out Gray Diamond 0.200ct Loose (FANCY DARK GRAY, SI-2)

Gray Diamond 0.200ct Loose (FANCY DARK GRAY, SI-2)
Sold out オーストラリア産ブラックオパール 0.588ctルース

[On sale May 3rd at 10 PM] Australian Black Opal 0.588ct Loose Stone
Sold out エメラルド 2.498ctルース

[Clover in cut] Emerald 9mm/2.498ct {Collaboration} Loose with patch
Sold out コロンビア産エメラルド 2.018ctルース

[Koshu precious stone cutter pluethree] Colombian emerald 2.018ct loose
Sold out Montana Sapphire 0.561ct loose (bicolor sapphire)

Montana Sapphire 0.561ct loose (bicolor sapphire)
Sold out 【12562021掲載】ファイアオパール 6.742ctルース

Mexican fire opal 6.742ct loose

Sold out 【12561997掲載】メキシコ産ファイアオパール 1.461ctルース

Mexican Fire Opal 1.461ct Loose (Egg-in-Opal)

Sold out グリーントルマリン 2.144ctルース

Green tourmaline 2.144ct loose
Sold out コッパールチルクォーツ 1.747ctルース

Copper rutilated quartz 1.747ct loose

Sold out 【12548254掲載】パパラチアサファイア 0.474ctルース

[12548254 published] Padparadscha sapphire 0.474ct loose
Sold out アルマンディンガーネット 3.214ctルース

[Rouge cut] Almandine garnet 3.214ct loose

Sold out Gray Diamond 0.079ct Loose (FANCY DARK GRAY, I-1)

Gray Diamond 0.079ct Loose (FANCY DARK GRAY, I-1)

Sold out Kenyan Tsavorite 0.164ct Loose Stone

Kenyan Tsavorite 0.164ct Loose Stone
Sold out Australian boulder opal 6.152ct loose

Australian boulder opal 6.152ct loose

Sold out Sri Lankan Moonstone 1.487ct Loose

Sri Lankan Moonstone 1.487ct Loose
Sold out タンザニア産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 0.928ctルース

Tanzanian Andesine Labradorite (also known as Rainbow Moonstone) 0.928ct loose stone
Sold out Pink tourmaline 0.341ct loose

Pink tourmaline 0.341ct loose

Sold out [Sakura In-Cut] Sapphire from Ratnapura, Sri Lanka, 6.0mm/0.839ct Loose

[Sakura In-Cut] Sapphire from Ratnapura, Sri Lanka, 6.0mm/0.839ct 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.