Skip to content

Pre-sale

Sort by

coming soon FANCY PURPLISH PINK/SI-1/with Pink Diamond Gacha (Multiple purchase discount available)
coming soon Authentic Gem Encyclopedia 3D Stickers Vol. 1: The Big Five Gems
coming soon Authentic Gem Encyclopedia 3D Stickers Vol. 1: The Big Five Gems
coming soon [12558084 posted] Benitoite 0.190ct Loose, with identification report, Made in America Benitoite 0.158ct Loose, with identification report Benitoite 0.190ct Loose, with identification report
coming soon K18/Pt950 ブラジル産パライバトルマリン 0.045ct リング
coming soon カメレオンダイヤモンド 4.0mm/0.255ctルース(LIGHT GRAYISH GREEN YELLOW, VS2)
coming soon スペイン産スファレライト 6.1mm/1.197ctルース
coming soon ナミビア産ジェレメジェバイト 0.061ctルース 鑑別書
Sold out ネオンブルーアパタイト 0.393ctルース
Sold out ネオンブルーアパタイト 0.364ctルース
Sold out ミャンマー産グレースピネル(プラチナスピネル) 4.2mm/0.385ctルース
coming soon 【12563438掲載】マラウイ産ムーンストーン(マラウイムーンストーン) 2.598ctルース
coming soon 【12563437掲載】マラウイ産ムーンストーン(マラウイムーンストーン) 1.948ctルース
coming soon 【12563436掲載】マラウイ産ムーンストーン(マラウイムーンストーン) 2.199ctルース
coming soon 【12563435掲載】マラウイ産ムーンストーン(マラウイムーンストーン) 3.158ctルース
Sold out オーストラリア産ブラックオパール 0.877ctルース
Sold out ブラジル産ティンカーベルクォーツ(ピンクファイヤークォーツ) 2.795ctルース
coming soon オーストラリア産レインボーラティスサンストーン 2.073ctルース
coming soon 高知県産血赤珊瑚 4.485ctルース
Sold out [Sale starts July 11th, 10 PM JST] Limited to 16 Stones! Pink Diamond Gacha with 2 FANCY Color Pink Diamonds (with sorting certificate), normally ¥39,800. Multiple Purchase Discount Available.
coming soon [Sale on 7/ at 10 PM JST] Limited 6 stones: Rainbow Aquamarine, average 0.7ct (Multiple purchase discount available)
Sold out Pt900 ブルーサファイア 0.52ct・ダイヤモンド0.19ctペンダントトップ(ネックレストップ)鑑別書
Sold out ジンバブエ産ユークレース 0.065ctルース
Sold out 非加熱パープルサファイア 0.775ctルース
Sold out {June Campaign Limited Edition} Rare Stone Gacha💎 Padparadscha Sapphire 0.3ct+ with Certificate, Benitoite, Red Beryl, etc. Loose Stones for 1 Stone {Multiple Purchase Discounts Available}
Sold out [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"
Sold out [Sale begins 7/XX 10 PM JST] Limited 1 Set: Treated Diamond Set (approx. 1.2mm x 11 stones, 0.086ct) [Bulk purchase discount available]
Sold out [On sale July 5th, 10 PM JST] 《Limited 13 Stones》Unique Diamond Gacha - Including 1ct+ diamonds, round cut, rose cut, and fluorescent diamonds (with a bonus London Blue Diamond stone!) 《Multiple Purchase Discount Available》
Sold out [On sale July 6th at 10 PM] Limited 1 set: 11-stone treated diamond set (approx. 1.2mm x 11 stones) [Multiple purchase discount available]
Sold out 《Shinjuku Pop-Up Event Commemorative Offer》《Limited Stock Remaining》 Color Diamond Set (including pink, ice blue, green diamonds, and more, 9 stones or more in total), valued at ¥30,000 normally. 《Multi-Purchase Discount Available》
coming soon ブラジル産グリーントルマリン 1.319ctルース
Sold out ダイヤモンド 0.197ctルース(K, VS-2, VeryGood)
coming soon Pt900 ダイヤモンド原石 2.733ct・ダイヤモンド0.68ctリング 鑑別書
coming soon K18スライスダイヤモンド・イエローサファイア ピアス
Sold out ビルマ産ルビー 0.120ctルース
Sold out モザンビーク産ルビー 0.300ctルース
Sold out ブラジル産デュモルチェライトインクォーツ 1.082ctルース
Sold out ブラジル産デュモルチェライトインクォーツ 1.040ctルース
Sold out ブラジル産ブラックガーデンクォーツ 3.621ctルース
Sold out ジンバブエ産ユークレース 0.053ctルース
Sold out スリランカ産ブルーサファイア 0.557ctルース
Sold out モザンビーク産ルビー 0.415ctルース
Sold out パパラチアサファイア 0.206ctルース
Sold out [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"
Sold out [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"
coming soon 【12562748掲載】アメリカ産ネプチュナイト 0.859ctルース
coming soon US Benitoite 0.148ct Loose Stone (Emerald Cut) with Gem Identification Report

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.