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ドイツ産アウイナイト 0.056ctルース

German Awinite 0.056ct loose stone Sale price¥25,800
ダイヤモンド 0.042ctルース

Diamond 0.042ct loose (VS class equivalent, emerald cut) Sale price¥8,800
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
コロンビア産エメラルド 0.512ctルース

Colombian emerald 0.512ct loose stone (silky type) Sale price¥14,800
コロンビア産パイライト・雲母インエメラルド 0.844ctルース

Colombian pyrite-mica emerald 0.844ct loose stone Sale price¥35,800
Brazilian Romanesite in Quartz 2.914ct loose stone

Brazilian Romanesite in Quartz 2.914ct loose stone Sale price¥9,800
ブラジル産フラワークォーツ 4.666ctルース

Brazilian Flower Quartz 4.666ct Loose Stone Sale price¥12,800
フラワークォーツ 6.928ctルース

Brazilian Flower Quartz 6.928ct Loose Stone Sale price¥17,800
ブラジル産フラワークォーツ 6.004ctルース

Brazilian Flower Quartz 6.004ct Loose Stone Sale price¥15,800
フラワークォーツ 7.144ctルース

Brazilian Flower Quartz 7.144ct Loose Stone Sale price¥17,800
フラワークォーツ 6.501ctルース

Brazilian Flower Quartz 6.501ct Loose Stone Sale price¥16,800
ブラジル産フラワークォーツ 6.582ctルース

Brazilian Flower Quartz 6.582ct Loose Stone Sale price¥16,800
タンザニア産クロムトルマリン 0.988ctルース

Tanzanian Chrome Tourmaline 0.988ct Loose Stone Sale price¥6,980
クロムトルマリン 0.772ctルース

Tanzanian Chrome Tourmaline 0.772ct Loose Stone Sale price¥6,980
クロムトルマリン 0.798ctルース

Tanzanian Chrome Tourmaline 0.798ct Loose Stone Sale price¥6,980
タンザニア産クロムトルマリン 0.522ctルース

Tanzanian Chrome Tourmaline 0.522ct Loose Stone Sale price¥5,980
タンザニア産クロムトルマリン 0.859ctルース

Tanzanian Chrome Tourmaline 0.859ct Loose Stone Sale price¥8,800
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
メキシコ産オパール 1.803ctルース

Mexican Opal 9.6mm/1.803ct Loose (Contralus Opal) Sale price¥69,800
エチオピア産オパール 0.961ctルース

Ethiopian Opal 0.961ct Loose (Sphere) Sale price¥7,980
シトリン 5.121ctルース

[Koshu Precious Stones plusthree] Citrine 5.121ct Loose Sale price¥39,800
[Koshu Precious Stones Plusthree] Tibetan Andesine 7.873ct [Collaboration] Loose Stone (Color Change Andesine)

[Koshu Precious Stones Plusthree] Tibetan Andesine 7.873ct [Collaboration] Loose Stone (Color Change Andesine) Sale price¥39,800
ラベンダークォーツ（スコロライト） 1.761ctルース

[Koshu Precious Stones Plusthree] Lavender Quartz (Scorolite) 1.761ct Loose Stone Sale price¥39,800
Afghanite from Afghanistan 0.617ct loose stone

Afghanite from Afghanistan 0.617ct loose stone Sale price¥69,800
クリソベリルキャッツアイ 1.088ctルース

Chrysoberyl cat's eye 1.088ct loose stone Sale price¥8,800
Benitoite 1.8mm/0.025ct loose stone (colorless benitoite)

Benitoite 1.8mm/0.025ct loose stone (colorless benitoite) Sale price¥12,800
Benitoite 1.8mm/0.025ct loose stone (colorless benitoite)

Benitoite 1.8mm/0.025ct loose stone (colorless benitoite) Sale price¥15,800
Benitoite 1.8mm/0.028ct loose stone (colorless benitoite)

Benitoite 1.8mm/0.028ct loose stone (colorless benitoite) Sale price¥14,800
Madagascar Bekiri Blue Garnet (Color Change Garnet) 4.5mm/0.369ct Loose Stone

Madagascar Bekiri Blue Garnet (Color Change Garnet) 4.5mm/0.369ct Loose Stone Sale price¥29,800
クリストバライトインクォーツ 2.417ctルース

Cristobalite in Quartz 2.417ct Loose Stone Sale price¥12,800
クリストバライトインクォーツ 1.660ctルース

Cristobalite in Quartz 1.660ct Loose Sale price¥9,800
Pakistani Oil in Quartz 1.337ct Loose Stone (Moving Bubbles)

Pakistani Oil in Quartz 1.337ct Loose Stone (Moving Bubbles) Sale price¥19,800
ブラジル産アクアマリン 0.874ctルース

Brazilian Aquamarine 0.874ct Loose Stone (Phantom Cut) Sale price¥8,800
Limited to 17 stones: 1 loose Afghanite stone from Afghanistan. Discounts available for multiple purchases.

Limited to 17 stones: 1 loose Afghanite stone from Afghanistan. Discounts available for multiple purchases. Sale price¥2,980
Diamond (Old Mine Cut) 1 Loose Stone {Multiple Purchase Discounts Available}

Diamond (Old Mine Cut) 1 Loose Stone {Multiple Purchase Discounts Available} Sale price¥4,980
Limited to 10 stones: Madagascar Andesine Labradorite (Pink Schiller) 1 loose stone (Multiple purchase discounts available)

Limited to 10 stones: Madagascar Andesine Labradorite (Pink Schiller) 1 loose stone (Multiple purchase discounts available) Sale price¥6,980
Brazilian rutilated quartz (rutile/rutile quartz (rutilated quartz)) 1 loose stone (6.0-6.5mm, for beginners) {Multiple purchase discounts available}

Brazilian rutilated quartz (rutile/rutile quartz (rutilated quartz)) 1 loose stone (6.0-6.5mm, for beginners) {Multiple purchase discounts available} Sale price¥2,580
Brazilian rutilated quartz (rutile/rutilated quartz (rutilated quartz)) 1 loose stone (3.0-3.5mm, for beginners) {Multiple purchase discounts available}

Brazilian rutilated quartz (rutile/rutilated quartz (rutilated quartz)) 1 loose stone (3.0-3.5mm, for beginners) {Multiple purchase discounts available} Sale price¥1,580
{2 stones remaining} 1 Labradorite loose stone (20 x 15 mm, for beginners) {Multiple purchase discounts available}

{2 stones remaining} 1 Labradorite loose stone (20 x 15 mm, for beginners) {Multiple purchase discounts available} Sale price¥3,980
ベニトアイト 0.352ctルース

Benitoite 0.352ct loose Sale price¥298,000
Brazilian Paraiba Tourmaline 0.405ct loose stone (CuO2.7% CuO2.2%) GIA

Brazilian Paraiba Tourmaline 0.405ct loose stone (CuO2.7% CuO2.2%) GIA Sale price¥198,000
スリランカ産スターサファイア 2.093ctルース

Sri Lankan Star Sapphire 2.093ct Loose Sale price¥9,800
マダガスカル産バイカラースフェーン 1.551ctルース

Madagascar Bicolor Sphene 1.551ct Loose Stone Sale price¥19,800
ブラジル産モルガナイト 3.929ctルース

Brazilian Morganite 3.929ct loose stone Sale price¥19,800
ブラジル産モルガナイト 7.339ctルース

Brazilian Morganite 7.339ct loose stone Sale price¥39,800
オーストラリア産オパール 1.170ctルース

Australian Opal 1.170ct Loose Sale price¥18,800
Australian black opal 1.107ct loose stone

Australian black opal 1.107ct loose stone Sale price¥35,800
オーストラリア産ブラックオパール 0.407ctルース

Australian black opal 0.407ct loose stone Sale price¥8,800

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.