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ロシア・マリシェボ産フェナカイト 4.7mm/0.428ctルース 日独

[On sale 9/29, 10 PM] Russian Malyshevo Phenakite 4.7mm/0.428ct Loose Stone, JGL Certified Sale price¥14,800
ロシア産フェナカイト 0.489ctルース

[Available 10/16, 10 PM] Russian Malyshevo Phenakite 0.489ct Loose Stone (JGL Certified) Sale price¥15,800
スリランカ産グリーンジルコン 0.802ctルース

【Available Oct 15 at 10 PM】 Sri Lankan Green Zircon 0.802ct Loose Gemstone Sale price¥16,800
ケニア産非加熱ゴールドシーンサファイア 0.224ctルース 鑑別書

[Available 10/4, 10 PM] Kenyan Unheated Gold Sheen Sapphire 0.224ct Loose Gemstone with Identification Report Sale price¥15,800
タンザニア産ドラゴンガーネット 0.748ctルース

Tanzanian Dragon Garnet 0.748ct Loose Stone Sale price¥18,800
ブラジル産バイカラートルマリン 3.337ctルース

[9/7 10 PM Release] Brazilian Bicolor Tourmaline 3.337ct Loose Stone Sale price¥59,800
【12562567掲載】ボリビア産フォスフォフィライト 1.806ctルース

[Lottery Sale 0812_19] Bolivian Phosphophyllite 1.806ct Loose Stone with Gemstone Identification Report Sale price¥69,800
ブラジル・ファナジーニョ産スフェーン 0.956ctルース 鑑別書

【Lottery Sale 0818_02】Brazilian Fanaizinho Sphene 0.956ct Loose Stone with Certificate Sale price¥19,800
K18 マダガスカル産パパラチアサファイア 4.3mm/0.412ct・ダイヤモンド0.57ctリング 中宝鑑

[Lottery Sale 0812_11] K18 Madagascar Padparadscha Sapphire 0.412ct / Diamond 0.57ct Ring Sale price¥168,000
インターナリーフローレスダイヤモンド（H&C） 4.0mm/0.245ctルース(D, IF, 3Excellent H&C)

【9/6 10:00 PM Sale】Internally Flawless Diamond (H&C) 4.0mm/0.245ct Loose (D, IF, 3Excellent H&C) Sale price¥128,000
【9/7 10:00 PM Sale】《Limited to 10 Stones》Diamond Gacha with a Chance to Win a Certified Diamond (All stones VS class or equivalent)《Multi-purchase discounts available》

【9/7 10:00 PM Sale】《Limited to 10 Stones》Diamond Gacha with a Chance to Win a Certified Diamond (All stones VS class or equivalent)《Multi-purchase discounts available》 Sale price¥3,980
[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥18,800
[Available 9/5 at 10:00 PM] 《3 stones only》 Top-quality American benitoite (Princess cut, 2mm) 《Multi-purchase discount available》

[Available 9/5 at 10:00 PM] 《3 stones only》 Top-quality American benitoite (Princess cut, 2mm) 《Multi-purchase discount available》 Sale price¥12,800
K18/Pt950 ブラジル産パライバトルマリン 0.053ct リング

[Lottery Sale 3][For Winners Only][Listed as 22602615] K18/Pt950 Brazilian Paraiba Tourmaline 0.053ct Ring (CuO: 1.4%, MnO: 3.1%) Sale price¥158,000
[Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire

[Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire Sale price¥3,980
ブラジル産パライバトルマリン 4.022ctルース

[Available 9/5 at 10 PM] Brazilian Paraiba Tourmaline 4.022ct Loose Gemstone Sale price¥45,800
ブラジル産パライバトルマリン 20.343ct原石

【9/5 22:00 Release】 Brazilian Paraiba Tourmaline 20.343ct Rough Stone Sale price¥15,800
ブラジル産パライバトルマリン 8.246ct原石

[Available 9/5, 10 PM] 8.246ct Rough Paraiba Tourmaline from Brazil Sale price¥25,800
Pt900 キャシテライト 4mm/0.57ct ・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

[Lottery Sale 0812_03] Pt900 Cassiterite from Yunnan Province, China 4mm/0.57ct Diamond 0.16ct Pendant Top (Necklace Top) with Appraisal Certificate Sale price¥69,800
カシミール産非加熱サファイア 2.6mm/0.110ctルース GIA

[Lottery Sale ②_202608_02] Unheated Kashmir Sapphire 2.6mm/0.110ct Loose Stone GIA Sale price¥79,800
ブラジル産バイカラーピンクユークレース 3.210ctルース

【Lottery Sale ②_202608_12】Brazilian Bi-Color Pink Euclase 3.210ct Loose Stone with Japan-Germany Gemological Report Sale price¥798,000
南アフリカ産南アフリカ産ロードクロサイト 2.694ctルース

[Lottery Sale 0620_03] South African Rhodochrosite 2.694ct Loose Stone Sale price¥228,000
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.477ct原石

[Listed under 12563270] South African rough diamond (sawable) 0.477ct Sale price¥178,000
オーストラリア産非加熱ティールブルーサファイア 1.010ctルース

[Lottery Sale 0718_05] Unheated Australian Teal Blue Sapphire 1.010 ct Loose GIA Sale price¥128,000
Spanish Sphalerite 2.726ct loose stone

Spanish Sphalerite 2.726ct loose stone Sale price¥32,800
Spanish bicolor sphalerite 3.504ct loose stone

Spanish bicolor sphalerite 3.504ct loose stone Sale price¥35,800
1.953ct Bicolor Sphalerite from Spain

1.953ct Bicolor Sphalerite from Spain Sale price¥18,800
Zimbabwean Apatite (UV Type) 0.585ct Loose

Zimbabwean Apatite (UV Type) 0.585ct Loose Sale price¥8,800
ジンバブエ産アパタイト（UVタイプ） 0.209ctルース

Zimbabwean Apatite (UV type) 0.209ct loose stone Sale price¥4,980
ブラジル産アベンチュリンアクアマリン 0.471ctルース

Nigerian Aventurine Aquamarine 0.471ct Loose Stone Sale price¥6,980
ブラジル産レピドクロサイトインクォーツ 1.126ctルース

Brazilian Lepidocrocite in Quartz 1.126ct Loose Stone Sale price¥9,800
ヴァイオレットサファイア 0.328ctルース

Violet Sapphire 4.3mm/0.328ct Loose Sale price¥15,800
ブラジル産モルガナイト 4.720ctルース

Brazilian Morganite 4.720ct loose stone Sale price¥98,000
【12548202掲載】インド産カバンサイト 1.171ctルース

Indian Cavansite 1.171ct loose stone Sale price¥8,800
【12550850掲載】モザンビーク産ピンクトルマリン 1.122ctルース

Mozambique Pink Tourmaline 1.122ct Loose Stone (Contains CuO) Sale price¥39,800
【12551314掲載】ジンバブエ産ブルーアパタイト（UVタイプ） 1.019ctルース

Zimbabwean Blue Apatite (UV Type) 1.019ct Loose Sale price¥8,800
Bicolor Euclase from Zimbabwe 0.033ct loose

Bicolor Euclase from Zimbabwe 0.033ct loose Sale price¥18,800
【12549646掲載】キャシテライト 1.658ctルース

Cassiterite 1.658ct loose stone (bicolor cassiterite) Japan-Germany exchange Sale price¥98,000
【12550981掲載】マンガノタンタライト 0.736ctルース

Manganotantalite 0.736ct loose stone from Japan and Germany Sale price¥128,000
ブラジル産ルチル（単結晶） 1.474ctルース

[Lottery Sale ②_9][Winners Only][Listing 12563396] Brazil Rutile (Single Crystal) 1.474ct Loose Stone with Certification Sale price¥39,800
非加熱モンタナサファイア（ヨーゴ産） 0.173ctルース

[Lottery Sale 0707_10] Unheated Montana Sapphire (Yogo Mine) 0.173ct Loose Stone with Japan-Germany Gemological Report Sale price¥98,000
マダガスカル産ティールブルーサファイア 0.748ctルース 鑑別書

[Lottery Sale 0725_05] Madagascar Teal Blue Sapphire 0.748ct Loose Stone with Appraisal Sale price¥28,800
タンザニア産ピンクゾイサイト 0.398ctルース 鑑別書

【Lottery Sale 0718_07】Tanzanian Pink Zoisite 0.398ct Loose Stone with Certificate Sale price¥59,800
ミャンマー産レッドスピネル 1.001ctルース

[Lottery Sale ②_202608_07] Myanmar Orange Spinel 0.855ct Loose Stone Sale price¥98,000
ブラジル産インディゴライトトルマリン 3.756ctルース

Lottery Sale 0812_15: Brazilian Indicolite Tourmaline 3.756ct Loose Stone with Japan-Germany Gemological Report Sale price¥98,000
Brazilian Paraiba Tourmaline 0.037ct Loose (CuO:1.9%, MnO:2.3%)

Brazilian Paraiba Tourmaline 0.037ct Loose (CuO:1.9%, MnO:2.3%) Sale price¥29,800
Paraiba Tourmaline from Brazil 0.067 ct loose (CuO: 1.4%, MnO: 2.4%)

Paraiba Tourmaline from Brazil 0.067 ct loose (CuO: 1.4%, MnO: 2.4%) Sale price¥39,800
【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¥6,980

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.