New stock

Madagascar Pezzottaite 4mm/0.217ct loose stone Sale price¥7,980

[Koshu Precious Stone Cut Plusthree] Peridot 6mm/0.792ct Loose Patch Sale price¥24,800

Indian Alexandrite Cat's Eye 0.255ct Loose Stone Sale price¥8,800

Nigerian Cobalt Garnite 0.663ct Loose Stone Sale price¥29,800

Montana Sapphire 0.405ct Loose (Green Sapphire) Sale price¥9,800

Montana Sapphire 0.331ct Loose (Bi-Color Sapphire) Sale price¥8,800

Montana Sapphire 0.228ct Loose (Yellow Sapphire) Sale price¥7,980

Mozambique Pink Tourmaline 1.122ct Loose Stone (Contains CuO) Sale price¥39,800

Zimbabwean Blue Apatite (UV Type) 1.019ct Loose Sale price¥14,800

Brazilian Paraiba Tourmaline 0.759ct rough stone Sale price¥45,800

Russian diamond rough (sawable) 0.094ct rough Sale price¥24,800

Colombian oil-free emerald 0.060ct loose stone GIA Sale price¥65,800

Bicolor Euclase from Zimbabwe 0.033ct loose Sale price¥28,800

《Yurakucho Marui 2024112 takeout》Pakistani lazurite (blue sapphire) 0.305ct loose stone Sale price¥49,800

《Yurakucho Marui 2024112 takeout》Pakistani lazurite (blue sapphire) 0.375ct loose stone Sale price¥59,800

【12551486掲載】ベトナム産非加熱シルキーピンクサファイア 0.441ctルース

《Yurakucho Marui 2024112 takeout》Vietnamese unheated silky pink sapphire 0.441ct loose stone Sale price¥29,800

【12551483掲載】ベトナム産非加熱シルキーピンクサファイア 0.433ctルース

《Yurakucho Marui 2024112 takeout》Vietnamese unheated silky pink sapphire 0.433ct loose Sale price¥29,800

Cassiterite 1.658ct loose stone (bicolor cassiterite) Japan-Germany exchange Sale price¥128,000

Chinese bicolor fluorite 1.215ct loose stone Sale price¥7,980

【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

Sri Lankan Star Sapphire 5.225ct Loose Sale price¥98,000

Colombian Trapiche Emerald 0.291ct Loose Sale price¥15,800

【ダンデライオンカット】ライモナイトインクォーツ（オーロラクォーツ） 16mm/11.759ctルース（5枚花びら）

[Dandelion Cut] Brazilian Limonite in Quartz (Aurora Quartz) 16mm/11.759ct Loose (5 Petals) Sale price¥29,800

【さくらインカット】ブラジル産ライモナイトインクォーツ（オーロラクォーツ） 11.3mm/3.760ct《コラボ》ルース　ワッペン

[Sakura Incut] Brazilian Limonite in Quartz (Aurora Quartz) 11.3mm/3.760ct {Collaboration} Loose Patch Sale price¥29,800

【12552583掲載】ライモナイトインクォーツ（オーロラクォーツ） 5.216ctルース

[Star in Cut] Brazilian Limonite in Quartz (Aurora Quartz) 12mm/5.216ct Loose Patch Sale price¥19,800

[On sale from 10pm on 8/17] Bicolor fluorite 6.1mm/0.869ct loose stone Sale price¥6,980

Manganotantalite 0.736ct loose stone from Japan and Germany Sale price¥158,000

Colombian Mica in Emerald 4.6mm/0.210ct Loose Stone Sale price¥12,800

Pink diamond 0.072ct loose (FANCY DEEP PURPLE PINK, I1) Sale price¥69,800

Colombian Trapiche Emerald 0.147ct Loose Sale price¥9,800

Colombian mint color emerald 0.178ct loose stone Sale price¥6,980

非加熱ブラジル産パライバトルマリン 0.037ctルース（CuO:1.9%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.037ct loose stone (CuO: 1.9%, MnO: 2.3%) Sale price¥49,800

【12552018掲載】コロンビア産トラピッチェエメラルド 0.416ctルース

Colombian Trapiche Emerald 0.416ct Loose Sale price¥22,800

Colombian mint color emerald 0.198ct loose stone Sale price¥6,980

Ethiopian Opal 5.2mm/0.688ct Loose (Sphere) Sale price¥6,980

非加熱ブラジル産パライバトルマリン 0.067ctルース（CuO:1.4%、MnO:2.4%）

Unheated Brazilian Paraiba Tourmaline 0.067ct loose stone (CuO: 1.4%, MnO: 2.4%) Sale price¥59,800

Russian Diamond Rough (Sawable) 0.105ct Loose (Trigon) Sale price¥28,800

Limited to 7 stones: 1 loose Sri Lankan spinel (lozenge cut) stone. Discounts available for multiple purchases. Sale price¥4,980

Limited to 8 stones: 1 Brazilian Alexandrite loose stone (rose cut, 3.2mm/average 0.12ct) Multiple purchase discounts available Sale price¥11,000

Limited to 9 stones: 1 Brazilian Alexandrite loose stone (rose cut, 3mm/average 0.105ct) Multiple purchase discounts available Sale price¥9,800

Limited to 4 stones: 1 Brazilian Alexandrite loose stone (rose cut, 3.3mm/average 0.13ct) Multiple purchase discounts available Sale price¥12,800

Pt950 Diamond (Cabochon Cut) 0.131ct Ring Sale price¥158,000

K18マダガスカル産スフェーン0.48ct・グリーンダイヤモンド・オパールペンダント（ネックレス）

K18 Madagascar sphene 0.48ct, green diamond, opal pendant (necklace) Sale price¥98,000

K18PGカナリーイエローダイヤモンド（トリートメント）0.214ct・アレキサンドライトリング中宝付

K18PG Canary Yellow Diamond (Treatment) 0.214ct Alexandrite Ring with Medium Treasure Sale price¥128,000

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

K18YG Australian black opal 0.736ct diamond ring Sale price¥98,000

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

Pt950 South Sea pearl 9.586ct, alexandrite, kornerupine, diamond ring Sale price¥198,000

K18YG南洋真珠10.616ct・ベキリーブルーガーネット・アレキサンドライト・ダイヤモンドリング

K18YG South Sea pearl 10.616ct, Bekiri blue garnet, alexandrite and 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