5 major gems

【#202607 Akihabara Pop-up Store - Currently Out of Stock】【Colorful】Pt900 Diamond 1.00ct Ring Sale price¥98,000

【#202607 Akihabara Pop-up Store - Currently Removed for Display】[Colorfuri] Pt900 Black Opal 0.83ct / Diamond 0.62ct Ring with Certificate Sale price¥198,000

[#202607 Akihabara Pop-up Store - Currently out on display] [Listed under item 12562542] Australian Black Opal 0.530ct Loose Stone Sale price¥14,800

【#202607 Akihabara Pop-up Store - Currently at Offsite Location】【Shinjuku Marui Annex 202605 Offsite Location】Lottery Sale 11【For Winners Only】【Published on 12559975】Colombian Non-Oil Emerald 1.760ct Loose GIA Sale price¥1,580,000

[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

[#202607 Akihabara Pop-up currently out of office] [Sale starts August 19th, 10 PM JST] Slice Trapiche Diamond 0.228ct Loose Sale price¥18,800

カメレオンダイヤモンド 0.255ctルース(FANCY LIGHT GRAYISH GREENISH YELLOW（カメレオン）, SI-2)

[On Sale 8/13 at 10 PM] Chameleon Diamond 0.255ct Loose (FANCY LIGHT GRAYISH GREENISH YELLOW (Chameleon), SI-2) Sale price¥79,800

イエローダイヤモンド 0.144ctルース(FANCY VIVID YELLOW, SI-2)

[Sale on August 13th at 10 PM] Yellow Diamond 3.2mm/0.144ct Loose (FANCY VIVID YELLOW, SI-2) Sale price¥55,800

[On sale August 9, 10 PM] Australian Opal 0.674ct Loose Stone with Certificate Sale price¥8,800

【#202607 Akihabara Pop-up Store Carry-out】【12562676 Listed】Sri Lankan Blue Sapphire 0.501ct Loose Stone Sale price¥29,800

【Sakura Shape】Synthetic Sapphire 8.8mm/3.631ct Loose Stone Sale price¥39,800

[#202607AkihabaraPopUpTakeout][12562677Listed] Sri Lankan Blue Sapphire 0.513ct Loose Sale price¥22,800

[On sale August 19th at 10 PM] Colombian Pyrite and Mica in Emerald 5.5mm/0.617ct Loose Stone with Certification Sale price¥45,800

[Listed on 12563962] Madagascar Padparadscha Sapphire 0.314 ct Loose Stone Sale price¥69,800

《再入荷》【宝石商の道具】ゲルタックケース3個セット《透明・黒背景の2種類有》（ブルーサファイア3石付） - カラッツSTORE

[Jeweler's Tools] Set of 3 gel tack cases (2 types: transparent and black background) (includes 3 blue sapphires) (discount available for multiple purchases) Sale price¥3,980

H&C（ハート&キューピッド）専用スコープ（ダイヤモンド専用スコープ) - カラッツSTORE

[Jeweler's Tools] H&C (Heart & Cupid) Special Scope (Diamond Special Scope) Sale price¥1,580

Ice blue diamond 1.2mm or 2.0mm 1 stone (VS class equivalent, round cut) {Multiple purchase discount available} Sale priceFrom ¥4,980

Lab-Grown Diamond (Synthetic Diamond) [HPHT Method] Single Loose Stone (2.0mm, 2.2mm, 2.4mm, 2.6mm) [Multiple Purchase Discounts Available] Sale priceFrom ¥1,580

H&C (Heart & Cupid) Diamond 2.0mm Loose (VS Class, DG Class, 2mm Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥7,980

【一律1000円】アメリカ産・ハーキマーダイヤモンド（ロッククリスタル）1石原石

[Flat rate 1000 yen] 1 American Herkimer diamond (rock crystal) rough stone (discount available for multiple purchases) Sale price¥1,000

"PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device-Inspired Ring with Inspector Design [Tsunemori Akane Model] (Pink Diamond) Sale priceFrom ¥29,800

1 beryllium diffused sapphire stone (approximately 2.5mm, round cut)《Multiple purchase discounts available》 Sale price¥1,580

H&C (Hearts & Cupids) Diamond 1.2mm Loose (VS Class, DG Class, Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥3,980

ピンクオパール・ブルーオパール2石セット（小・大サイズ） - KARATZ STORE｜カラッツSTORE

Pink opal/blue opal 2 stone set (small/large size)《Discount available for multiple purchases》 Sale priceFrom ¥1,980

1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》 Sale price¥2,280

1 American Herkimer Diamond (rock crystal) 💎 (child-bearing type)《Multiple purchase discount available》 Sale price¥2,980

Green Diamond (Treatment) 1 stone (approx. 1.3mm)《Multiple purchase discount available》 Sale price¥3,580

H&C(ハート&キューピッド)ダイヤモンド1.2mmルース - カラッツSTORE

H&C (Hearts & Cupids) Diamond 1.5mm Loose (VS Class, DG Class, Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥4,980

ネパール産オーシャンブルーカイヤナイト＋ブルーカイヤナイト2石セット《複数購入割引有》

Limited to 20 sets: Nepalese Ocean Blue Kyanite + Blue Kyanite 2-stone set (Multiple purchase discounts available) Sale price¥3,980

1 blue fluorescent diamond (H&C, 3EX, VS-SI class equivalent, 2.0mm) {Multiple purchase discount available} Sale price¥8,980

"PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device Image Ring - Enforcer Design [Yayoi Rokuitsuka Model] "Ice Blue Sapphire" Sale priceFrom ¥25,800

Gem Gacha💎 Sri Lankan Sapphire《Ratnapura》1 loose stone (average 0.75ct)《Multiple purchase discount available》 Sale price¥5,980

Colombian emerald loose rough stone set of 2 stones (round cut 3mm)《Multiple purchase discount available》 Sale price¥6,980

Diamond (Old Mine Cut) 1 Loose Stone {Multiple Purchase Discounts Available} Sale price¥4,980

Limited to 18 stones: Mozambique ruby (princess cut, 2.3-2.5mm) Multiple purchase discounts available Sale price¥3,980

Limited to 14 stones: Beryllium-heated sapphire (3.5mm, KEN cut) - 1 loose stone. Discounts available for multiple purchases. Sale price¥1,580

【5/21 22時販売】【KEN氏】メキシコ産オパール1石（約3.5mm）《複数購入割引有》 - カラッツSTORE

1 Mexican opal (approx. 3.5mm) {Multiple purchase discounts available} Sale price¥3,980

《Limited to 12 Stones》Sri Lankan Star Sapphire 1 Stone Loose Gemstone《Multiple Purchase Discount Available》 Sale price¥4,980

Diamond loose/certificate transfer fee Sale price¥6,600

《Limited to 21 Stones》Conch Pearl & Shell Gacha from the Dominican Republic, including Flame Pattern, 1 Stone Loose《Multi-purchase Discount Available》 Sale price¥3,980

Limited to 25 stones: 1 unheated yogo sapphire rough stone. Discounts available for multiple purchases. Sale price¥4,980

《Limited to 15 stones》Lab Grown Diamond Gacha💎Includes a 1.02ct/D/VS1/3EX certified lab grown diamond, usually priced at ¥50,000 (with 1 synthetic cobalt spinel as a bonus) 《Bulk Purchase Discount Available》 Sale price¥5,980

Limited to 10 stones: Australian Opal Lottery with Certificate of Authenticity (including Australian Black Opal) (plus 1 Mexican Fire Opal) (Multiple purchase discounts available) Sale price¥6,980

Limited Edition of 12 Diamonds: VS Equivalent Fluorescent Diamond Gacha with Bonus Mini Slice Diamond (Multiple Purchase Discounts Available) Sale price¥6,980

Single loose Russian oil-free emerald (1.6-1.7mm, princess cut) {Multiple purchase discounts available} Sale price¥9,800

Nepalese Kyanite 1 stone loose (Royal Blue color, 4 x 6mm, oval cut) {Multiple purchase discount available} Sale price¥3,980

1 stone of green opal from South Africa (discount available for multiple purchases) Sale priceFrom ¥2,980

《Limited to 9 Stones》Rare Round Cabochon Cut Sri Lankan Star Sapphire (approx. 5.0mm) 《Multiple Purchase Discount Available》 Sale price¥9,800

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'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.