Ruth

Spanish Sphalerite 5.3mm/1.009ct loose stone Sale price¥6,980

Brazilian London Blue Topaz 0.985ct Loose Sale price¥8,800

Brazilian London Blue Topaz 0.966ct Loose Stone Sale price¥8,800

Brazilian Sky Blue Topaz 1.256ct Loose Stone Sale price¥8,800

Brazilian Swiss Blue Topaz 6.4mm/1.225ct Loose Stone Sale price¥9,800

Sri Lankan spinel 0.763ct loose stone Sale price¥12,800

Nigerian Morganite 0.349ct loose stone Sale price¥8,800

Nigerian Morganite 0.381ct loose stone Sale price¥5,980

【さくらシェイプ】ブラジル産アメトリン 20mm/21.554ct《コラボ》ルース　ワッペン

[Sakura Shape] Brazilian Ametrine 20mm/21.554ct {Collaboration} Loose Patch Sale price¥98,000

【甲州貴石切子plusthree】ブラジル産アメトリン 6.557ctルースワッペン

[Koshu Precious Stones Plusthree] Brazilian Ametrine 6.557ct Loose Stone Patch Sale price¥55,800

【甲州貴石切子plusthree】ブラジル産アメトリン 6.457ctルースワッペン

[Koshu Precious Stones Plusthree] Brazilian Ametrine 6.457ct Loose Stone Patch Sale price¥55,800

【甲州貴石切子《桜切子》】ブラジル産スカイブルートパーズ 8.169ctルースワッペン

[Koshu Precious Stone Cutting "Sakura Cutting"] Brazilian Sky Blue Topaz 8.169ct Loose Patch Sale price¥55,800

Limited to 15 stones: 1 loose Smithsonite stone (average 2 carats) Multiple purchase discounts available Sale price¥3,980

Limited to 7 stones: 1 Tanzanian rhodolite garnet loose stone (polished by American polisher KEN) Multiple purchase discounts available Sale price¥3,980

Limited to 9 stones: 1 Brazilian green beryl loose stone. Discounts available for multiple purchases. Sale price¥3,580

Limited to 17 stones: 1 Brazilian green beryl loose stone. Discounts available for multiple purchases. Sale price¥2,580

Limited to 7 stones: 1 loose sphalerite stone from Spain (cabochon cut, 4.8-5.3mm) Multiple purchase discounts available Sale price¥3,980

Spanish Sphalerite 5.1mm/0.928ct loose stone Sale price¥5,980

Spanish Sphalerite 5.9mm/1.132ct loose stone Sale price¥6,980

Spanish Sphalerite 5.9mm/1.498ct loose stone Sale price¥8,800

Spanish Sphalerite 6.3mm/1.771ct loose stone Sale price¥8,800

Spanish Sphalerite 0.949ct loose stone Sale price¥18,800

Madagascar Petzotite Cat's Eye 0.393ct Loose Stone Sale price¥29,800

Tanzanite 0.513ct loose stone (sugarloaf cut) from Tanzania Sale price¥9,800

Indian Alexandrite Cat's Eye 0.643ct Loose Stone Sale price¥18,800

非加熱ブラジル産パライバトルマリン 0.065ctルース（CuO:2.0%、MnO:2.2%）

Unheated Brazilian Paraiba Tourmaline 0.065ct loose stone (CuO: 2.0%, MnO: 2.2%) Sale price¥59,800

Myanmar Purple Spinel 0.311ct Loose Stone Sale price¥8,800

モザンビーク産エルバイトトルマリン 1.580ctルース（CuO:0.1%,Mn0:1.9％）

Elbaite tourmaline from Mozambique 1.580ct loose stone (CuO: 0.1%, Mn0: 1.9%) Sale price¥59,800

Madagascar pink sapphire 0.486ct loose stone Sale price¥12,800

Brazilian Alexandrite 0.147ct loose stone (princess cut) Sale price¥29,800

Blue beryl (Macis beryl) 0.172ct loose stone Sale price¥8,800

Yellow sapphire from Sri Lanka 0.375ct loose Sale price¥12,800

Madagascar sapphire 0.206ct loose stone Sale price¥12,800

Madagascar Yellow Sapphire 0.493ct Loose Sale price¥9,800

Unheated Sri Lankan purple sapphire 0.986ct loose stone Sale price¥9,800

Australian Rainbow Lattice Sunstone 1.313ct Loose Stone Sale price¥12,800

Australian Rainbow Lattice Sunstone 1.914ct Loose Stone Sale price¥19,800

Australian Rainbow Lattice Sunstone 1.231ct Loose Stone Sale price¥19,800

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） 0.182ctルース

Bekiri Blue Garnet (Color Change Garnet) from Madagascar 3.5mm/0.182ct Loose Stone Sale price¥25,800

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） 0.189ctルース

Bekiri Blue Garnet (Color Change Garnet) from Madagascar 3.5mm/0.189ct Loose Stone Sale price¥24,800

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） 0.302ctルース

Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.302ct Loose Stone Sale price¥39,800

Canadian Shortite 0.423ct Loose Stone, Japan-Germany Mirror Sale price¥69,800

アフガニスタン産バイカラートルマリン 2.664ctルース（シーフォームトルマリン）

Afghanistan Bicolor Tourmaline 2.664ct Loose Stone (Seafoam Tourmaline) Sale price¥128,000

Brazilian Green Tourmaline 1.031ct Loose Stone Sale price¥22,800

ブラウンダイヤモンド 0.554ctルース (カボションカット,SIクラス相当)

Brown diamond 0.554ct loose (cabochon cut, SI class equivalent) Sale price¥69,800

Limited to 10 stones: 1 Australian rainbow lattice sunstone loose stone (average 0.28ct) Multiple purchase discounts available Sale price¥3,980

Limited to 8 stones: 1 Australian rainbow lattice sunstone loose stone (average 0.60ct) Multiple purchase discounts available Sale price¥6,980

Brazilian Pink Tourmaline 0.772ct Loose Stone Sale price¥12,800

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.