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コロンビア産パイライト・雲母インエメラルド 0.628ctルース

Colombian pyrite-mica emerald 0.628ct loose stone Sale price¥35,800
コロンビア産エメラルド 0.231ctルース

Colombian emerald 0.231ct loose stone Sale price¥28,800
コロンビア産トラピッチェエメラルド 0.372ctルース

Colombian Trapiche Emerald 0.372ct Loose Sale price¥19,800
コロンビア産トラピッチェエメラルド 0.299ctルース

Colombian Trapiche Emerald 0.299ct Loose Sale price¥16,800
コロンビア産パイライトインエメラルド 6.415ctルース

Colombian pyrite in emerald 6.415ct loose stone Sale price¥298,000
コロンビア産エメラルド ルース・原石2石セット（ラウンドカット3mm）

Colombian emerald loose rough stone set of 2 stones (round cut 3mm)《Multiple purchase discount available》 Sale price¥6,980
coming soon 【12563833掲載】コロンビア産パイライトインエメラルド 2.988ctルース

[Lottery Sale 0731_06] Colombian Pyrite in Emerald 2.988 ct Loose Stone with Japanese and German Gemological Certificates Sale price¥228,000
coming soon [Lottery Sale 0825_09] Colombian Non-Oil Emerald 0.080ct Loose GIA

[Lottery Sale 0825_09] Colombian Non-Oil Emerald 0.080ct Loose GIA Sale price¥118,000
coming soon [Lottery Sale 0825_10] Colombian Non-Oil Emerald 0.090ct Loose GIA

[Lottery Sale 0825_10] Colombian Non-Oil Emerald 0.090ct Loose GIA Sale price¥128,000
coming soon 【9/4 22時販売】《限定7石》コロンビア産ミントカラーエメラルド原石（平均0.51ct）《複数購入割引有》

【9/4 22時販売】《限定7石》コロンビア産ミントカラーエメラルド原石（平均0.51ct）《複数購入割引有》 Sale price¥6,980
coming soon 【12564169掲載】コロンビア産エメラルド 40.360ctルース

[Lottery Sale 0829] Colombian Emerald 40.360ct Loose Stone Sale price¥148,000
coming soon 【12564165掲載】コロンビア産ノンオイルエメラルド 0.290ctルース

[Lottery Sale 0829] Colombian Non-Oil Emerald 0.290ct Loose Stone Sale price¥188,000
Sold out ユークレース 3.417ct原石

Colombian Euclase 3.417ct rough stone
Sold out (In Stock) Lottery Sale 4 [For Winners Only] [Published on 12559711] Colombian Oil-Free Emerald 0.050ct Loose Stone (NONE) GIA

(In Stock) Lottery Sale 4 [For Winners Only] [Published on 12559711] Colombian Oil-Free Emerald 0.050ct Loose Stone (NONE) GIA
Sold out コロンビア産パイライトインエメラルド 4.680ctルース

[Deadline: Thursday, May 14th, 10 am JST] Lottery Sale_0508_10 Colombian Pyrite in Emerald Loose Stone, 4.680ct
Sold out Pt900 コロンビア産ミントカラーエメラルド 4mm/0.22ct ・ダイヤモンド0.16ctペンダントトップ（ネックレストップ）鑑別書

Pt900 Colombia Mint Color Emerald 4mm/0.22ct & Diamond 0.16ct Pendant Top with Certificate

Sold out コロンビア産パイライト・雲母インエメラルド 0.271ctルース 鑑別書

[On sale August 2nd at 10 PM] Colombian pyrite and mica-in-emerald 0.271ct loose stone with gemological report
Sold out コロンビア産エメラルド 1.470ctルース

Colombian Emerald, 1.470 ct, Loose, with Origin Report (Houseki Kyo)

Sold out コロンビア産エメラルド 0.792ctルース

[Sale begins August 5th at 10 PM] Colombian Emerald 0.792ct Loose Stone with Certification
coming soon [Lottery Sale 0829] Colombian Non-Oil Emerald 0.600ct Loose Stone

[Lottery Sale 0829] Colombian Non-Oil Emerald 0.600ct Loose Stone Sale price¥348,000
Sold out コロンビア産パイライトインエメラルド 4.222ctルース

Colombian Pyrite in Emerald 4.222ct Loose Stone

Sold out コロンビア産エメラルド 0.135ctルース

Loose Colombian emerald, 0.135 ct, Hōki Kyō (Japan Gem Laboratory)
Sold out コロンビア産パイライトインエメラルド 2.107ctルース

Lottery Sale 11 [For Winners Only] [Listing 12562752] Colombian Pyrite in Emerald Loose Stone 2.107ct

Sold out コロンビア産ユークレース 2.365ctルース

Euclase from Colombia, 2.365 ct loose
Sold out コロンビア産パイライトインエメラルド 3.817ctルース

Colombian pyrite emerald 3.817ct loose stone

Sold out コロンビア産エメラルド 0.167ctルース

Colombian emerald 0.167ct loose stone with jewel
Sold out 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
Sold out 【12562862掲載】コロンビア産トラピッチェエメラルド 0.448ctルース

Colombian Trapiche Emerald, 0.446 ct, Loose Stone, with Certificate
Sold out Colombian non-oil emerald (NONE) 0.060ct loose GIA

Colombian non-oil emerald (NONE) 0.060ct loose GIA
Sold out Colombian emerald 0.153ct rough stone

Colombian emerald 0.153ct rough stone
Sold out 【12562785掲載】コロンビア産エメラルドキャッツアイ 0.574ctルース

Colombian emerald cat's eye 0.574ct loose stone
Sold out コロンビア産エメラルド 4.7mm/0.468ctルース

Colombian Emerald 4.7mm/0.468ct Loose Stone

Sold out コロンビア産エメラルドキャッツアイ 1.571ctルース

Colombian emerald 1.571ct loose stone pendant top
Sold out コロンビア産パイライトインエメラルド 2.780ctルース

Colombian Pyrite Inclusion Emerald 2.780ct Loose Rare Stone [Limited to 1 pc] ¥198,000 12562799

Sold out Loose Columbian Pyrite in Emerald 3.346 ct

Loose Columbian Pyrite in Emerald 3.346 ct

Sold out コロンビア産パイライトインエメラルド 2.503ctルース

2.503 ct Loose Emerald with Pyrite from Colombia

Sold out 【12562829掲載】コロンビア産パイライト付ユークレース 23.430ct原石

Euclase with pyrite from Colombia 23.430ct Rough, Hōki Kyōso
Sold out Colombian mica in emerald 1.314ct loose

Colombian mica in emerald 1.314ct loose
Sold out コロンビア産ユークレース 5.223ctルース

Euclase from Colombia 5.223ct Ruth Japanese German edition

Sold out Colombian No-Oil Emerald 0.120ct Loose Stone GIA

Colombian No-Oil Emerald 0.120ct Loose Stone GIA
Sold out 18K Yellow Gold Colombian Emerald Ring

18K Yellow Gold Colombian Emerald Ring
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 《Limited to 20 Stones》Emerald Gacha: Win a 2.2ct Columbia Emerald Koshu-Kiseki Cut (normally 79,800 yen) or an Emerald Cat's Eye! 《Multiple Purchase Discount Available》

《Limited to 20 Stones》Emerald Gacha: Win a 2.2ct Columbia Emerald Koshu-Kiseki Cut (normally 79,800 yen) or an Emerald Cat's Eye! 《Multiple Purchase Discount Available》
Sold out Colombian trapiche emerald (reverse trapiche) 3.0mm/0.107ct rough stone (faceted cut)

Colombian trapiche emerald (reverse trapiche) 3.0mm/0.107ct rough stone (faceted cut)
Sold out [#May2026Campaign, #May2026Gacha][On sale February 13, 10 PM] Limited 6 sets: Colombian Reverse Trapiche Emerald & Brazilian Emerald (Sugarloaf Cut) 2-stone set [Multi-buy discount available]

[#May2026Campaign, #May2026Gacha][On sale February 13, 10 PM] Limited 6 sets: Colombian Reverse Trapiche Emerald & Brazilian Emerald (Sugarloaf Cut) 2-stone set [Multi-buy discount available]
Sold out Colombian emerald 10.940ct rough stone

Colombian emerald 10.940ct rough stone
Sold out Colombian emerald rough stone 18.900ct (with pyrite)

Colombian emerald rough stone 18.900ct (with pyrite)
Sold out 0.243ct Colombian Emerald Pair Loose Stones

0.243ct Colombian Emerald Pair Loose Stones

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.