Login

Above 10.0ct

Sort by
ブラジル産グリーントルマリン 26.071ctルース（シュガーローフカット）

Brazilian Green Tourmaline 26.071ct Loose Stone (Sugarloaf Cut) Sale price¥298,000
オーストラリア産シェルオパール（貝オパール） 73.321ct原石

Australian Shell Opal (Shell Opal) 73.321ct Rough Stone Sale price¥49,800
スリランカ産グラスボディ（サファイアクリスタル） 10.140ct原石

Sri Lankan glass body (sapphire crystal) 10.140ct rough stone Sale price¥29,800
グリーンフローライト 38.074ctルース

Green Fluorite 38.074ct Loose Sale price¥158,000
イエローベリル 11.411ctルース

Brazilian Yellow Beryl 11.411ct Loose Stone, Japan-Germany Exchange Sale price¥25,800
メキシコ産カンテラオパール 20.655ctルース

Mexican Cantera Opal 20.655ct Loose Sale price¥19,800
エチオピア産オパール 167.191ct原石

Ethiopian Opal 167.191ct Rough Stone Sale price¥39,800
ブラジル産グリーントルマリン 12.252ctルース

Brazilian Green Tourmaline 12.252ct Loose Stone Sale price¥398,000
【ムーンシュタイナー】パイライトインクォーツ 18.288ctルース

[Moonsteiner] Pyrite in Quartz 18.288ct Loose Sale price¥59,800
【カメリアカット】カラーシフトアメジスト 20mm/26.815ct《コラボ》ルース ワッペン付

[Camellia cut] Color shift amethyst 20mm/26.815ct 《Collaboration》 Loose with emblem Sale price¥69,800
Gem Gacha💎 Lepidolite in Quartz 1 stone《Multiple purchase discount available》

Gem Gacha💎 Lepidolite in Quartz 1 stone《Multiple purchase discount available》 Sale price¥3,980
【12530283掲載】カンテラオパール 17.221ctルース

Cantera opal 17.221ct loose Sale price¥25,800
Sold out 高知県産血赤珊瑚 20.726ct原石

[On Sale 6/8, 10 PM JST] Kochi Prefecture Harvested Red Coral 20.726ct Branch (Raw Material)
Sold out 高知県産血赤珊瑚 21.156ct原石

[On sale June 3rd, 10 PM JST] Kochi Prefecture-produced oxblood coral, 21.156 ct raw coral
Sold out 【12562779掲載】ブラジル産デンドリティックアゲート 12.309ctルース

[On sale May 2, 10 PM] Brazilian Dendritic Agate 12.309ct Loose Stone
Sold out カンボジア産ブルージルコン（ラタナキリブルー） 23.105ctルース 鑑別書

[On Sale May 5th at 10 PM] Cambodian Blue Zircon (Ratanakiri Blue) 23.105ct Loose Stone with Appraisal
Sold out 【12562829掲載】コロンビア産パイライト付ユークレース 23.430ct原石

Euclase with pyrite from Colombia 23.430ct Rough, Hōki Kyōso
Sold out 【12562824掲載】ミャンマー産マスグラバイト／ターフェアイト 15.472ctルース

Myanmar Musgravite/Taaffeite (symbiotic type) 15.472ct Loose with GIA & ZGCL

Sold out ブラジル産クォーツインクォーツ 14.298ctルース

Brazilian Quartz in Quartz 14.298ct Loose Stone
Sold out インド産カバンサイト 240.461ct原石

Indian Cavansite 240.461ct rough stone
Sold out オーストラリア産シェルオパール（貝オパール） 96.177ct原石

Australian shell opal (shell opal) 96.177ct rough stone
Sold out Amber / Copal 41.008 ct Loose (with insect inclusion)

Amber / Copal 41.008 ct Loose (with insect inclusion)
Sold out Colombian emerald 10.940ct rough stone

Colombian emerald 10.940ct rough stone
Sold out Australian boulder opal 15.004ct loose stone

Australian boulder opal 15.004ct loose stone
Sold out Colombian emerald rough stone 18.900ct (with pyrite)

Colombian emerald rough stone 18.900ct (with pyrite)
Sold out ザンビア産アメジスト 39.112ct原石

Amethyst 39.112ct raw stone from Zambia
Sold out ザンビア産アメジスト 29.357ct原石

Amethyst 29.357ct raw stone from Zambia
Sold out パイライトインクォーツ 34.864ctルース

Pyrite in quartz 34.864ct loose
Sold out トリフィライトインクォーツ 13.378ctルース

Triphyllite in quartz 13.378ct loose
coming soon ガーデンクォーツ 23.495ctルース

Garden quartz 23.495ct loose Sale price¥3,980
Sold out [Koshu Precious Stones plusthree] Brazilian Garden Quartz 47.809ct Loose

[Koshu Precious Stones plusthree] Brazilian Garden Quartz 47.809ct Loose

Sold out マダガスカル産デマントイドガーネット 38.035ct原石

Demantoid garnet 38.035ct rough stone from Madagascar

Sold out [Takeshi Yamamoto] Brazilian Dendritic Quartz 25.875ct Loose

[Takeshi Yamamoto] Brazilian Dendritic Quartz 25.875ct Loose
Sold out 【12560374掲載】ブルートパーズキャッツアイ 22.761ctルース

Brazilian Blue Topaz Cat's Eye 15mm/22.761ct Loose Stone
Sold out ブラジル産トラピッチェアメジスト 24.772ctルース

Brazilian Trapichea Amethyst 24.772ct loose with patch
Sold out スターガーネット 14.600ctルース

Star garnet 14.600ct loose
Sold out Kunzite from Afghanistan 26.784ct loose

Kunzite from Afghanistan 26.784ct loose
Sold out Colombian emerald rough stone 11.155ct (with pyrite)

Colombian emerald rough stone 11.155ct (with pyrite)
Sold out [12/6 22:00] Myanmar Spinel in Marble 61.204ct Loose Stone

[12/6 22:00] Myanmar Spinel in Marble 61.204ct Loose Stone
Sold out [12/6 22:00 Sale] Blue Coral (75.469ct) Loose Stone

[12/6 22:00 Sale] Blue Coral (75.469ct) Loose Stone

Sold out ミャンマー産スピネルインマーブル 39.231ctルース

Myanmar spinel in marble 39.231ct loose stone

Sold out Colombian emerald rough stone 13.577ct

Colombian emerald rough stone 13.577ct
Sold out 【甲州貴石切子plusthree】パイライトインクォーツ 12.164ctルース ワッペン付

[Koshu precious stone Kiriko plusthree] Pyrite in quartz 12.164ct loose with patch
Sold out 【甲州貴石切子】モルガナイト 14.931ct《コラボ》ルース ワッペン付

[Koshu Precious Stone Kiriko] Morganite 14.931ct《Collaboration》Loose with emblem
Sold out クォーツ 96.732ctルース（爆裂水晶）

Quartz 96.732ct loose (explosion crystal)
Sold out 南洋真珠 16.5mm/26.946ctルース

South Sea Pearl 16.5mm/26.946ct Loose
Sold out 【12544758掲載】ウッドオパール 24.319ctルース

Wood opal 24.319ct loose
Sold out ミャンマー産スターサファイア 11.192ctルース

Myanmar Star Sapphire 11.192ct Loose

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.