Login

Out of stock

Sort by
Sold out カシミール産非加熱サファイア 0.260ctルース

Unheated Kashmir Sapphire 0.260ct Loose Stone GIA

Sold out オーストラリア産エメラルド 0.320ctルース

Australian emerald 0.320ct loose stone
Sold out 【12545153掲載】ミャンマー産トラピッチェルビー 0.160ct原石

Myanmar trapichel ruby ​​0.160ct rough stone
Sold out ミャンマー産トラピッチェルビー 0.179ct原石

Myanmar trapichel ruby ​​0.179ct rough stone
Sold out ブラジル産ロードナイト 2.126ctルース 日独鑑

Brazilian Rhodonite 2.126ct Ruth Japanese-German Edition
Sold out ピンクスピネル 0.409ctルース

Pink spinel 0.409ct loose
Sold out マダガスカル産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 1.127ctルース

Andesine Labradorite (commonly known as Rainbow Moonstone) from Madagascar 1.127ct loose
Sold out アマゾン産グリーンオパール 1.120ctルース

Amazon green opal 1.120ct loose
Sold out ロードライトガーネット 0.990ctルース

Rhodolite garnet 0.990ct loose
Sold out 【サンジェ氏】ブルージルコン 0.322ctルース

Blue zircon 0.322ct loose stone
Sold out 【甲州貴石切子】モルガナイト 14.931ct《コラボ》ルース ワッペン付

[Koshu Precious Stone Kiriko] Morganite 14.931ct《Collaboration》Loose with emblem
Sold out 【甲州貴石切子plusthree】パイライトインクォーツ 12.164ctルース ワッペン付

[Koshu precious stone Kiriko plusthree] Pyrite in quartz 12.164ct loose with patch
Sold out アルマンディンガーネット 2.076ctルース

[Rouge cut] Almandine garnet 2.076ct loose
Sold out [Available at 10 PM on December 5th] 18K Yellow Gold Burmese Pink Spinel 3.9mm/0.276ct Hot Pink Spinel Ring

[Available at 10 PM on December 5th] 18K Yellow Gold Burmese Pink Spinel 3.9mm/0.276ct Hot Pink Spinel Ring
Sold out 【さくらインカット】マダガスカル産アパタイト 7.9mm/1.537ct《コラボ》ルース ワッペン

[Sakura In-Cut] Madagascar Green Apatite 7.9mm/1.537ct "Collaboration" Loose Stone Patch
Sold out ブラックスターサファイア 1.410ctルース

[12/5 22:00 Sale] Black Star Sapphire 1.410ct Loose
Sold out インターナリーフローレスダイヤモンド（H&C） 4.45mm/0.305ctルース(F, IF, 3Excellent H&C) GIA&中宝

[Sale Date: 12/5 10 PM] Internally Flawless Diamond (H&C) 4.45mm/0.305ct Loose (F, IF, 3 Excellent H&C)
Sold out K18YGコロンビア産エメラルド0.062ct・ダイヤモンドリング

18K Yellow Gold Colombian Emerald 3.0mm/0.062ct Diamond Ring
Sold out [Sales End on Sunday, February 15th] TV Anime "Tokyo Ghoul" x KARATZ Collaboration CCG Quinque Pendant

[Sales End on Sunday, February 15th] TV Anime "Tokyo Ghoul" x KARATZ Collaboration CCG Quinque Pendant

Sold out Mali Garnet (Grossular/Andradite Garnet) 0.872ct Loose Stone from the Republic of Mali with Certificate of Authenticity

Mali Garnet (Grossular/Andradite Garnet) 0.872ct Loose Stone from the Republic of Mali with Certificate of Authenticity
Sold out Indian Moonstone 5.1mm/0.426ct Loose Stone (Rose Cut)

Indian Moonstone 5.1mm/0.426ct Loose Stone (Rose Cut)
Sold out Colombian emerald rough stone 6.933ct

Colombian emerald rough stone 6.933ct
Sold out Colombian emerald 8.169ct rough stone

Colombian emerald 8.169ct rough stone
Sold out Colombian emerald rough stone 13.577ct

Colombian emerald rough stone 13.577ct
Sold out Brazilian Goshenite 0.527ct loose stone

Brazilian Goshenite 0.527ct loose stone
Sold out Spinel 0.310ct loose

Spinel 0.310ct loose
Sold out Synthetic cobalt spinel 1.886ct loose stone

Synthetic cobalt spinel 1.886ct loose stone
Sold out Synthetic spinel 1.793ct loose stone

Synthetic spinel 1.793ct loose stone
Sold out Synthetic sapphire 1.416ct loose stone (synthetic pink sapphire)

Synthetic sapphire 1.416ct loose stone (synthetic pink sapphire)
Sold out 2.077ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)

2.077ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)
Sold out 2.393ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)

2.393ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)
Sold out 0.559ct Sri Lankan Chrysoberyl Cat's Eye Loose Stone

0.559ct Sri Lankan Chrysoberyl Cat's Eye Loose Stone
Sold out American peridot 0.334ct loose stone

American peridot 0.334ct loose stone
Sold out ナイジェリア産グリーンベリル 0.258ctルース

[On Sale at 10 PM on December 6th] Nigerian Green Beryl 0.258ct Loose Stone
Sold out Have fun guessing what you'll receive! Gacha set of two gemstones (including rare stones) (Multiple purchase discounts available)

Have fun guessing what you'll receive! Gacha set of two gemstones (including rare stones) (Multiple purchase discounts available)
Sold out Diamond gacha featuring a 0.072ct FANCY DEEP pink diamond, normally priced at 70,000 yen, and ice blue diamonds equivalent to VS class. (Multiple purchase discounts available)

Diamond gacha featuring a 0.072ct FANCY DEEP pink diamond, normally priced at 70,000 yen, and ice blue diamonds equivalent to VS class. (Multiple purchase discounts available)
Sold out Limited Edition of 10 Blue Gemstones! 💎 0.142ct Brazilian Paraiba Tourmaline, Euclase from Zimbabwe, 1.17ct Cobalt Spinel (Certificate of Authenticity: Color Shift), Benitoite, and More! Discounts Available for Multiple Purchases!

Limited Edition of 10 Blue Gemstones! 💎 0.142ct Brazilian Paraiba Tourmaline, Euclase from Zimbabwe, 1.17ct Cobalt Spinel (Certificate of Authenticity: Color Shift), Benitoite, and More! Discounts Available for Multiple Purchases!
Sold out Internally Flawless Diamond (H&C) 3.8mm/0.210ct Loose (F, IF, 3 Excellent H&C) GIA & Chuho

Internally Flawless Diamond (H&C) 3.8mm/0.210ct Loose (F, IF, 3 Excellent H&C) GIA & Chuho
Sold out チタン酸ストロンチウム 0.410ctルース

Strontium titanate 4.2mm/0.410ct loose stone
Sold out モザンビーク産パライバトルマリン 0.229ctルース

Paraiba tourmaline from Mozambique 0.229ct loose
Sold out クリソベリルキャッツアイ 2.283ctルース

Chrysoberyl cat's eye 2.283ct loose
Sold out ジルコン 0.416ctルース

Zircon 0.416ct loose
Sold out メキシコ産ファイアオパール 4.5mm/0.244ctルース

Mexican Fire Opal 4.5mm/0.244ct Loose
Sold out 【サンジェ氏】パープルスピネル 0.995ctルース

Purple spinel 0.995ct loose stone
Sold out 【12545837掲載】モザンビーク産パライバトルマリン 0.256ctルース

Paraiba tourmaline from Mozambique 0.256ct loose

Sold out オーストラリア産ボルダーオパール 4.470ctルース

Australian boulder opal 4.470ct loose
Sold out パキスタン産カラーチェンジスフェーン 7.137ctルース

Color change sphene from Pakistan 7.137ct loose
Sold out Limited to 13 stones! Tourmaline gacha featuring indigolite tourmaline worth ¥50,000 and rubellite worth ¥60,000. Plus, one canary yellow tourmaline. Discounts available for multiple purchases.

Limited to 13 stones! Tourmaline gacha featuring indigolite tourmaline worth ¥50,000 and rubellite worth ¥60,000. Plus, one canary yellow tourmaline. Discounts available for multiple purchases.

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.