Specially selected items

【4/5 22時販売】ミャンマー産ポードレッタイト 0.790ctルース Sale price¥198,000

【4/4 22時販売】ミャンマー産スタースピネル 2.626ctルース Sale price¥198,000

【4/4 22時販売】コロンビア産パイライトインエメラルド 27.414ctルース Sale price¥298,000

[On sale at 22:00 on 3/30] Myanmar bicolor paudretteite 1.960ct loose stone Sale price¥1,000,000

[On sale at 10pm on 3/22] Sri Lankan Musgravite 0.389ct loose stone (tube-shaped inclusions) Nikkei Kan Sale price¥398,000

Brazilian Paraiba Tourmaline Ring and Half Eternity Ring Set (1.2mm) Sale price¥188,000

Lottery Sale 3 [For Winners Only] [12557829] Unheated Sri Lankan Sapphire 1.550ct Loose GIA Sale price¥198,000

[On sale at 10pm on 2/26] Brazilian cat's eye emerald 6.080ct loose stone, Japan-Germany Sale price¥298,000

バイカラークリソベリル（通称名バイカラーアレキサンドライト） 0.902ctルース日独鑑

[On sale from 22:00 on 2/11] Bicolor Chrysoberyl (also known as Bicolor Alexandrite) 0.902ct Loose Stone, Japan-Germany Sale price¥298,000

[On sale 2/9 at 10pm] Russian Demantoid Garnet (Horsetail certified) 5.2mm/0.661ct loose stone Sale price¥198,000

Colombian pyrite in emerald 15.291ct loose Sale price¥1,000,000

Colombian emerald rough stone 37.764ct (Gachala mine) Sale price¥598,000

Zimbabwe Bicolor Euclase 0.405ct Loose Stone by Nikkei Sale price¥298,000

[E_27 Yurakucho Marui Take-out] Russian Diamond Rough (Sawable) 0.618ct Rough (Trigon) Sale price¥228,000

Brazilian Paraiba Tourmaline and Diamond 13 Stone Half Eternity Ring Set (2.0mm) Sale price¥188,000

Pt900 Kashmir unheated sapphire 1.14ct / diamond 0.70ct ring GIA Sale price¥1,580,000

Brazilian Green Tourmaline 42.854ct Loose Stone Sale price¥198,000

Zimbabwe Bicolor Euclase 0.503ct Loose Stone, Japan-German Index [Featured in the Gemstone Encyclopedia] Sale price¥398,000

Tanzania Color Change Chrome Tourmaline 13.194ct Loose Stone Chuhokan Sale price¥398,000

[E_27 Yurakucho Marui Takeout] Oil-free emerald 0.604ct loose stone, Japan-Germany Sale price¥298,000

[E_27 Yurakucho Marui Take-out] Brazilian Alexandrite 0.519ct Loose Stone (Sugarloaf Cut) Sale price¥358,000

[E_27 Yurakucho Marui Take-out] Non-Oil Emerald 1.070ct Loose Gübelin Certificate Sale price¥698,000

[E_27 Yurakucho Marui] Pt900/Pt850 Australian black opal 0.37ct, diamond 0.73ct necklace Sale price¥198,000

Brazilian Bicolor Tourmaline 16.088ct Loose (Tricolor) Nikkei Sale price¥298,000

[E_27 Yurakucho Marui Take-out] Russian Oil-Free Emerald 0.640ct Loose GIA Sale price¥198,000

American Wulfenite 2.610ct loose stone Sale price¥298,000

Brazilian bicolor tourmaline cat's eye 22.056ct loose stone Sale price¥198,000

Pt900/K18ブラックオパールキャッツアイ0.736 ペンダント（ネックレス）

Pt900/K18 Australian Black Opal Cat's Eye 0.736ct Diamond Pendant (Necklace) Chuho Sale price¥258,000

[E_27 Yurakucho Marui Take-out] Myanmar Podrettite 0.834ct loose stone Sale price¥298,000

ノンオイルエメラルド 1.030ctルースグベリングベリン（Gübelin）鑑別書

Non-Oil Emerald 1.030ct Loose Gübelin Gübelin Certificate Sale price¥698,000

[E_27 Yurakucho Marui Takeout] K18PG Unheated Brazilian Paraiba Tourmaline 0.10ct Ring AIGS Sale price¥228,000

K18YG Brazilian Paraiba Tourmaline 0.30ct Diamond Ring GIA Sale price¥198,000

K18YG Unheated Padparadscha Sapphire 0.61ct Ruby Blue Sapphire Ring GIA Sale price¥198,000

[E_27 Yurakucho Marui] Blue Sapphire 5.616ct Loose Stone, Japan-German Index, Featured in the Gemstone Encyclopedia Sale price¥498,000

[E_27 Yurakucho Marui Take-out] Tanzanite from Tanzania 6.006ct loose stone Sale price¥228,000

[E_27 Yurakucho Marui Takeout] Pt950 Brazilian Paraiba Tourmaline 0.172ct Half Eternity Ring Sale price¥188,000

Bicolor Benitoite 0.601ct Loose Japanese-German Edition Sale price¥458,000

[E_27 Yurakucho Marui Take-out] Tanzanian Pink Zoisite 5.8mm/0.848ct Loose Stone Sale price¥198,000

Brazilian Rubellite 3.845ct loose stone Sale price¥198,000

[E_27 Yurakucho Marui Take-out] Tanzanian bicolor sapphire 0.818ct loose (tricolor sapphire) Sale price¥198,000

ブラジル産パライバトルマリン 0.620ctルース（CuO：2.72%,MnO：4.93%）GIA&中宝分析

[E_27 Yurakucho Marui] Brazilian Paraiba Tourmaline 0.620ct loose stone (CuO: 2.72%, MnO: 4.93%) GIA & Chuho analysis Sale price¥1,580,000

ブラジル産非加熱バイカラーパライバトルマリン 0.220ctルース(CuO:2.7%、MnO:3.2%) GIA

Brazilian unheated bicolor Paraiba tourmaline 0.220ct loose stone (CuO: 2.7%, MnO: 3.2%) GIA Sale price¥198,000

[E_27 Yurakucho Marui Take-out] K18 Indian Iolite Sunstone 0.73ct Tanzanite Ring Sale price¥188,000

Top Quality Benitoite 13 Stone Half Eternity Ring Set (2.0mm) Sale price¥248,000

Brazilian unheated bicolor Paraiba tourmaline 0.178ct loose stone (CuO: 0.9%, MnO: 2.8%) Sale price¥298,000

【12551828掲載】コロンビア産パイライト・雲母インエメラルド 3.208ctルース

Colombian pyrite-mica emerald 3.208ct loose stone Sale price¥228,000

K18PGブラジル産パライバトルマリン0.286ct・グランディディエライトリング GIA

K18PG Brazilian Paraiba Tourmaline 0.286ct Grandidierite Ring GIA Sale price¥198,000

Pt950南洋真珠9.586ct・アレキサンドライト・コーネルピン・ダイヤモンドリング

[E_27 Yurakucho Marui Take-out] Pt950 South Sea pearl 9.586ct, Alexandrite, Kornerupine, Diamond Ring Sale price¥198,000

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.

KARATZ・Five Commitments