New stock

【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

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

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

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

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

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

非加熱ブラジル産パライバトルマリン 0.034ctルース（CuO:1.8%、MnO:2.4%）

Unheated Brazilian Paraiba Tourmaline 0.034ct loose stone (CuO: 1.8%, MnO: 2.4%) Sale price¥39,800

【12552015掲載】コロンビア産トラピッチェエメラルド 0.266ctルース

Colombian Trapiche Emerald 0.266ct Loose Sale price¥14,800

【12552125掲載】デトロイトシティ産ロードクロサイト 0.439ctルース

Detroit City Rhodochrosite 4mm/0.439ct Loose Stone Sale price¥8,800

Unheated Brazilian Paraiba Tourmaline 0.071ct loose stone (CuO: 2.1%, MnO: 2.2%) Sale price¥59,800

【さくらシェイプ】カンボジア産ブルージルコン 8mm/2.909ct《コラボ》ルースワッペン

[Sakura Shape] Cambodian Blue Zircon 8mm/2.909ct {Collaboration} Loose Patch Sale price¥59,800

[Sakura Shape] Tanzanite from Tanzania 6mm/0.889ct {Collaboration} Loose Patch Sale price¥59,800

[Sakura Shape] Brazilian White Topaz 8.5mm/2.870ct {Collaboration} Loose Patch Sale price¥39,800

Mexican Cantera Opal 4.835ct Loose Sale price¥19,800

Limited to 7 stones: 1 loose stone of spinel (blue/purple) from Madagascar. Discounts available for multiple purchases. Sale price¥3,980

【12549199掲載】奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.543ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 0.543ct loose Sale price¥6,980

Montana Sapphire 0.261ct Loose (Green Sapphire) Sale price¥8,800

【12549333掲載】ブラジル産メデューサクォーツ（パライバクォーツ） 1.945ctルース

Brazilian Medusa Quartz (Paraiba Quartz) 1.945ct Loose Stone Sale price¥24,800

American Herkimer Diamond 5.6mm/0.516ct Loose Sale price¥9,800

Brazilian Goshenite 0.771ct loose stone Sale price¥6,980

Synthetic Moissanite 10mm/4.121ct Loose Stone (Portuguese Cut) Sale price¥19,800

Chinese bicolor fluorite 0.950ct loose stone Sale price¥6,980

Brazilian Paraiba Tourmaline 0.200ct loose stone (CuO: 1.7%, MnO: 2.8%) Sale price¥98,000

Brazilian Dolomite 4.070ct Loose Stone, Japan-Germany Mirror Sale price¥98,000

Brazilian Paraiba Tourmaline 0.821ct rough stone Sale price¥39,800

Colombian emerald 1.435ct rough stone Sale price¥18,800

Tanzanian bicolor tanzanite rough stone 2.750ct Sale price¥9,800

Oligoclase 41.120ct rough stone Sale price¥6,980

Canadian Catapleite 0.298ct Loose Stone, Japan-Germany Mirror Sale price¥49,800

Colombian Trapiche Emerald 0.372ct Loose Sale price¥19,800

Colombian Trapiche Emerald 0.299ct Loose Sale price¥16,800

Russian rough diamond (sawable) 0.098ct loose Sale price¥24,800

Tanzanite from Tanzania 0.262ct loose stone Sale price¥8,800

Tanzania Bicolor Zoisite 0.397ct Loose Stone Sale price¥8,800

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の取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

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.