¥50,000 - ¥100,000

[Takeshi Yamamoto] Rose quartz 25.017ct loose stone Sale price¥59,800

[Takeshi Yamamoto] Ametrine 20.856ct loose stone Sale price¥98,000

[Takeshi Yamamoto] Rock crystal 78.580ct loose stone Sale price¥98,000

Pakistani Lazurite (Azurite) 0.123ct loose stone Sale price¥59,800

Brazilian Paraiba Tourmaline 0.181ct loose stone (CuO: 0.7%, MnO: 0.2%) Sale price¥59,800

【さくらシェイプ】ブラジル産インペリアルトパーズ（シェリーカラー） 6.3mm/1.084ct《コラボ》ルースワッペン

[Sakura Shape] Brazilian Imperial Topaz (Shelly Color) 6.3mm/1.084ct {Collaboration} Loose Patch Sale price¥79,800

【さくらシェイプ】アメリカ産オレゴンサンストーン 7.3mm/1.361ct《コラボ》ルースワッペン

Lottery Sale ⑤ [Lottery Sale 0928] [Published on 12555057] [Sakura Shape] Oregon Sunstone from the United States 7.3mm/1.361ct Loose Stone Sale price¥69,800

【さくらシェイプ】メキシコ産オパール 6.7mm/0.792ctルース（コントラルス）

[Sakura Shape] Mexican Opal 6.7mm/0.792ct {Collaboration} Loose (Contralus) Patch Sale price¥59,800

Brazilian Rubellite 2.022ct Loose Stone Sale price¥55,800

ブラジル産パライバトルマリン 0.167ctルース（CuO:1.1%、MnO:3.6%）

Brazilian Paraiba Tourmaline 0.167ct loose stone (CuO: 1.1%, MnO: 3.6%) Sale price¥69,800

Brazilian bicolor tourmaline 3.282ct loose Sale price¥59,800

【甲州貴石切子】ルチルクォーツ（ルチルレイテッドクォーツ） 12.860ctルース《コラボ》ワッペン

[Koshu Precious Stones Cut] Brazilian Rutile Quartz (Rutile-Rated Quartz) 12.860ct Loose Stone [Collaboration] Patch Sale price¥59,800

Tanzanite from Tanzania 1.522ct loose stone Sale price¥55,800

Madagascar emerald 0.816ct loose stone Sale price¥79,800

Kenyan Gold Sheen Sapphire 4mm/0.438ct Loose Sale price¥55,800

Diamond (cabochon cut) 0.366ct loose Sale price¥59,800

Tanzanian Rhodolite Garnet 10.608ct Loose Stone Sale price¥98,000

Mozambique Aquamarine 3.301ct Loose Stone Sale price¥59,800

Brazilian Paraiba Tourmaline in Quartz 2.674ct loose stone Sale price¥54,800

Brazilian Medusa Quartz (Paraiba Quartz) 7.250ct Loose Sale price¥54,800

Elbaite tourmaline from Mozambique 2.082ct loose stone (CuO: 0.1%, MnO: 1.4%) Sale price¥69,800

Colombian Trapiche Emerald 1.494ct Loose Sale price¥69,800

非加熱ブラジル産パライバトルマリン 0.044ctルース（CuO:1.6%、MnO:2.0%）

Unheated Brazilian Paraiba Tourmaline 0.044ct loose stone (CuO: 1.6%, MnO: 2.0%) Sale price¥59,800

非加熱ブラジル産パライバトルマリン 0.068ctルース（CuO:1.4%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.068ct loose stone (CuO: 1.4%, MnO: 2.3%) Sale price¥69,800

Colombian emerald 1.321ct loose stone (partly trapiche emerald) Sale price¥98,000

Russian Yellow Diamond Rough (Sawable) 0.306ct Rough (Trigon) Sale price¥98,000

Pt950 American Orange Benitoite 0.076ct Benitoite Ring Sale price¥98,000

K18PG Sri Lankan Yellow Sapphire 0.31ct Green Garnet Ring Sale price¥89,800

K18YG Brazilian Paraiba Tourmaline 0.203ct Pink Diamond Ring Sale price¥98,000

[Published in 22602357] K18 mint garnet 0.513ct ring Sale price¥79,800

Pt950 pink diamond 0.047ct diamond ring (FANCY LIGHT PURPLE PINK/SI-1/NONE) Sale price¥98,000

モザンビーク産エルバイトトルマリン 1.160ctルース（CuO:0.1%,MnO:2.3%）

Elbaite tourmaline from Mozambique 1.160ct loose stone (CuO: 0.1%, MnO: 2.3%) Sale price¥55,800

Madagascar Datolite (Datolite) 0.919ct Loose Stone Japan-Germany Exchange Sale price¥79,800

Brazilian Indigolite Tourmaline 1.616ct Loose Stone JTL Sale price¥69,800

Green tourmaline 1.190ct loose stone Sale price¥98,000

Tanzanite from Tanzania 2.011ct loose stone Sale price¥65,800

Madagascar sphene 6.506ct loose stone Sale price¥98,000

Madagascar sphene 4.161ct loose stone Sale price¥69,800

Madagascar sphene 2.791ct loose stone Sale price¥98,000

Brazilian Green Tourmaline 2.907ct Loose Stone Sale price¥98,000

Brazilian Green Tourmaline 4.374ct Loose Stone Sale price¥98,000

Nigerian Green Beryl 1.349ct Loose Stone Sale price¥98,000

Pt950ブラジル産パライバトルマリン0.034ctリング（フリュクーシュ枠・オーバルカット）

Pt950 Brazilian Paraiba Tourmaline Ring (Fluid Setting, Oval Cut) Sale price¥64,800

K18YG Brazilian Paraiba Tourmaline Ring (Flucche Setting, Pear Shape, Matte Finish) Sale price¥69,800

K18YG rose cut diamond 0.171ct ring Sale price¥89,800

K18YG American Turquoise 1.04ct Ring (Cat Cut) Sale price¥79,800

Pt950 Myanmar spinel 0.18ct 0.22ct earrings Sale price¥59,800

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.