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Sold out イエロースファレライト 0.409ctルース

Yellow sphalerite 0.409ct loose

Sold out 【カラフリ】K18サファイアペンダントトップ（ネックレストップ） - カラッツSTORE

[Colorful] K18 sapphire pendant top (necklace top)

Sold out 【12525791掲載】バイカラートルマリン 0.520ctルース

Bicolor tourmaline 0.520ct loose

Sold out 【11524997掲載】ベニトアイト 0.21ctルース

Benitoite 0.21ct loose

Sold out 【金平糖】ホワイトクォーツ 3.539ctルース - カラッツSTORE

[Konpeito] White quartz 3.539ct loose

Sold out 【金平糖】カルセドニー 2.760ctルース - カラッツSTORE

[Konpeito] Chalcedony 2.760ct loose

Sold out トラピッチェルビー 1石 - KARATZ STORE｜カラッツSTORE

Trapichell Bee 1 stone《Multiple purchase discount available》

Sold out リヒテライト 0.954ctルース - KARATZ STORE｜カラッツSTORE

richterite 0.954ct loose

Sold out スフェーン 0.358ctルース - KARATZ STORE｜カラッツSTORE

Sphene 0.358ct loose

Sold out スファレライト 1.281ctルース - KARATZ STORE｜カラッツSTORE

Sphalerite 1.281ct loose

Additional fee +25,000 yen

Additional charge for resizing: 8,250 yen Sale price¥8,250

Additional charge for resizing: 9,000 yen Sale price¥9,000
Sold out 「起源がわかる 宝石大全」初版＆宝石小瓶 2点セット

“An Encyclopedia of Gems that Understand the Origin” & Sapphire 2 Stone Set《Purchased in Chanthaburi, Thailand》

Sold out [Jeweler's Tools] Collection set of 24 loose cases, 3 loose cases [cut by Mr. KEN, worth 8,000 yen]

[Jeweler's Tools] Collection set of 24 loose cases, 3 loose cases [cut by Mr. KEN, worth 8,000 yen]

Sold out 【再入荷】鉱物標本スタンドとサンストーンorアイオライトの2点セット - KARATZ STORE｜カラッツSTORE

[Restocked] 2-piece set of mineral specimen stand and sunstone or iolite

Sold out Diamond 2mm (VS class, DG color, round cut, melee diamond 2.0mm) 1 loose stone {Multiple purchase discounts available}

Diamond 2mm (VS class, DG color, round cut, melee diamond 2.0mm) 1 loose stone {Multiple purchase discounts available}
Sold out 「決定版 アンカットダイヤモンド」サイン入り初版本 ＆ダイヤモンド原石（グリーン蛍光）2点セット

"Definitive Uncut Diamond" by Kyoichi Suwa, signed first edition & 2-piece set of diamonds (hexagonal cut)

Sold out [Sales End on Monday, January 12th] TV Anime "Tokyo Ghoul" x KARATZ Collaboration Part 2: Newly Illustration Merchandise - Random Hard Cards (12 Types)

[Sales End on Monday, January 12th] TV Anime "Tokyo Ghoul" x KARATZ Collaboration Part 2: Newly Illustration Merchandise - Random Hard Cards (12 Types)

Sold out Red spinel rough stone 1 stone (raspberry color)《Discount available for multiple purchases》

Red spinel rough stone 1 stone (raspberry color)《Discount available for multiple purchases》

Sold out Cobalt Garnite 1 stone (discount available for multiple purchases)

Cobalt Garnite 1 stone (discount available for multiple purchases)

Sold out 1 Dragon Garnet (4.0mm, round cut)

1 Dragon Garnet (4.0mm, round cut)

Sold out 【猫カット】アメジスト（8mm） - カラッツSTORE

[Cat cut] Amethyst (8mm)

Sold out 含浸ルビー・天然ルビー見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] 2-piece set for distinguishing impregnated rubies and natural rubies (discount available for multiple purchases)

Sold out Limited to 20 stones! Includes 6 red gemstones of pigeon blood ruby ​​with AGL certificate. Discounts available for multiple purchases.

Limited to 20 stones! Includes 6 red gemstones of pigeon blood ruby ​​with AGL certificate. Discounts available for multiple purchases.
Sold out Limited to 22 Sapphire Gacha (Includes Sakura In-Cut & Sakura Shape Sapphire, Bonus Hot Pink Sapphire) (Multiple Purchase Discounts Available)

Limited to 22 Sapphire Gacha (Includes Sakura In-Cut & Sakura Shape Sapphire, Bonus Hot Pink Sapphire) (Multiple Purchase Discounts Available)

Sold out ブルーベリル（マシシベリル）＆ミントグリーンベリル2石セット

[Resale] Blue Beryl (Mashishi Beryl) & Mint Green Beryl 2 stone set《Multiple purchase discount available》

Sold out Kochi Prefecture Blood Red Coral Loose (6-8mm / damaged by water pressure during retrieval) "Multiple purchase discount available"

Kochi Prefecture Blood Red Coral Loose (6-8mm / damaged by water pressure during retrieval) "Multiple purchase discount available"

Sold out 【宝石商の道具】冷却ヒビ入れ染色クォーツ・天然エメラルド見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] Cooling Cracked Dyed Quartz/Natural Emerald Identification 2-piece Set (Discount available for multiple purchases)

Sold out Limited Quantity: Russian Phenakite (Round Cut, 3mm) Loose Stone (Multiple Purchase Discounts Available)

Limited Quantity: Russian Phenakite (Round Cut, 3mm) Loose Stone (Multiple Purchase Discounts Available)
Sold out Gem gacha cut by Shimizu Kiseki and Yoichi Fukazawa 💎 {Multiple purchase discounts available} {Halloween specials included}

Gem gacha cut by Shimizu Kiseki and Yoichi Fukazawa 💎 {Multiple purchase discounts available} {Halloween specials included}

Sold out プリンセスカットダイヤモンド 2.0mm ルース（VSクラス相当）

Princess cut diamond 2.0mm loose (equivalent to VS class)《Multiple purchase discount available》

Sold out Russian alexandrite normally 69,800 JPY, rare twin chrysoberyl cat's eye normally 65,800 JPY, Alex Gacha (multiple purchase discount available)

Russian alexandrite normally 69,800 JPY, rare twin chrysoberyl cat's eye normally 65,800 JPY, Alex Gacha (multiple purchase discount available)
Sold out Limited to 13 stones! Tourmaline gacha featuring indigolite tourmaline worth ¥50,000 and rubellite worth ¥60,000. Plus, one canary yellow tourmaline. Discounts available for multiple purchases.

Limited to 13 stones! Tourmaline gacha featuring indigolite tourmaline worth ¥50,000 and rubellite worth ¥60,000. Plus, one canary yellow tourmaline. Discounts available for multiple purchases.

Sold out Limited to 14 stones: 1 Cambodian Ratanakiri Blue Zircon (4mm) Multiple purchase discounts available

Limited to 14 stones: 1 Cambodian Ratanakiri Blue Zircon (4mm) Multiple purchase discounts available
Sold out Limited to 25 stones: Brazilian Paraiba Tourmaline (including bicolor, Batalha) rough stones, average size 0.1ct. Discounts for multiple purchases available.

Limited to 25 stones: Brazilian Paraiba Tourmaline (including bicolor, Batalha) rough stones, average size 0.1ct. Discounts for multiple purchases available.
Sold out Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Sold out 《Limited to 13 stones》Synthetic Gacha (with additional synthetic alexandrite) including D/IF/3EX lab-grown diamonds normally priced at 39,800 yen and Sakura-cut YAGs normally priced at 59,800 yen. 《Multiple purchase discount available》

《Limited to 13 stones》Synthetic Gacha (with additional synthetic alexandrite) including D/IF/3EX lab-grown diamonds normally priced at 39,800 yen and Sakura-cut YAGs normally priced at 59,800 yen. 《Multiple purchase discount available》
Sold out Ruby Lottery: Win a 0.59ct Pigeon Blood Ruby with AIGS or a Burmese Star Ruby (Multiple Purchase Discounts Available)

Ruby Lottery: Win a 0.59ct Pigeon Blood Ruby with AIGS or a Burmese Star Ruby (Multiple Purchase Discounts Available)
Sold out Limited to 20 stones: Russian Demantoid Garnet (Horsetail inclusions, approximately 2mm) - 1 loose stone. Discounts available for multiple purchases.

Limited to 20 stones: Russian Demantoid Garnet (Horsetail inclusions, approximately 2mm) - 1 loose stone. Discounts available for multiple purchases.

Sold out 《New Tucson Arrivals・Limited to 13 Stones》Pakistani Lazurite (Azure Stone) Loose Stone《Multiple Purchase Discount Available》

《New Tucson Arrivals・Limited to 13 Stones》Pakistani Lazurite (Azure Stone) Loose Stone《Multiple Purchase Discount Available》
Sold out 《Limited to 20 Stones》Emerald Gacha: Win a 2.2ct Columbia Emerald Koshu-Kiseki Cut (normally 79,800 yen) or an Emerald Cat's Eye! 《Multiple Purchase Discount Available》

《Limited to 20 Stones》Emerald Gacha: Win a 2.2ct Columbia Emerald Koshu-Kiseki Cut (normally 79,800 yen) or an Emerald Cat's Eye! 《Multiple Purchase Discount Available》
Sold out 《Limited to 15 Stones》Rare Stone Gacha 💎 Featuring non-oiled red beryl with GIA certificate for 98,000 yen, cinnabar, Mozambique Paraiba tourmaline, benitoite, and more. 《Multiple purchase discount available》

《Limited to 15 Stones》Rare Stone Gacha 💎 Featuring non-oiled red beryl with GIA certificate for 98,000 yen, cinnabar, Mozambique Paraiba tourmaline, benitoite, and more. 《Multiple purchase discount available》
Sold out Single loose Russian oil-free emerald (2.1mm, square cut) {Multiple purchase discounts available}

Single loose Russian oil-free emerald (2.1mm, square cut) {Multiple purchase discounts available}
Sold out 1 loose sapphire from Ratnapura, Sri Lanka (3.0mm-4.0mm, trilliant cut)《Multiple purchase discount available》

1 loose sapphire from Ratnapura, Sri Lanka (3.0mm-4.0mm, trilliant cut)《Multiple purchase discount available》

Sold out [On Sale 6/6] Blue Diamond (Treated) Gacha, including Ice Blue Diamond (normally ¥35,800), limited to 11 stones (plus 1 tapered cut stone) [Multiple Purchase Discount Available]

[On Sale 6/6] Blue Diamond (Treated) Gacha, including Ice Blue Diamond (normally ¥35,800), limited to 11 stones (plus 1 tapered cut stone) [Multiple Purchase Discount Available]
Sold out Limited to 13 stones: Namibian Jeremejevite (Elemejevite) 1 stone loose stone (Multiple purchase discounts available)

Limited to 13 stones: Namibian Jeremejevite (Elemejevite) 1 stone loose stone (Multiple purchase discounts available)
Sold out 《Limited to 16 stones》Cornflower Blue Sapphire with AIGS certificate, Royal Blue Sapphire with certificate, (Plus a beautiful yellow sapphire worth 5,980 yen as a bonus) 💎Blue Sapphire Gacha 《Multiple purchase discount available》

《Limited to 16 stones》Cornflower Blue Sapphire with AIGS certificate, Royal Blue Sapphire with certificate, (Plus a beautiful yellow sapphire worth 5,980 yen as a bonus) 💎Blue Sapphire Gacha 《Multiple purchase discount available》

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.