5 major gems

[12/20 22:00 Sale] Colombian Emerald 8.169ct Rough Stone Sale price¥9,800

[12/20 22:00 Sale] Colombian Emerald 7.924ct Rough Stone Sale price¥9,800

[12/20 22:00 Sale] Colombian Emerald Rough Stone 6.933ct Sale price¥9,800

[12/20 22:00 Sale] Colombian Emerald Rough Stone 5.895ct Sale price¥9,800

Australian opal 0.286ct loose Sale price¥5,980

Australian boulder opal 3.695ct loose Sale price¥14,800

Australian boulder opal 2.470ct loose Sale price¥7,980

Sri Lankan star sapphire 2.094ct loose Sale price¥12,800

《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

[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery Sale price¥6,980

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

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

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

Rose cut diamond 1.2mm x 1 stone (VS-SI class, DH color, melee diamonds) {Multiple purchase discounts available} Sale price¥2,980

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

Diamond 1.2mm (VS class, DG color, round cut, melee diamond) 1 loose stone {Multiple purchase discounts available} Sale price¥1,980

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

[On sale from 10pm on 12/7] {Limited to 40 stones} Salt and pepper diamond (2mm, melee diamond) 1 loose stone {Multiple purchase discounts available} Sale price¥2,980

"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

1 green opal from Amazon《Discount available for multiple purchases》 Sale price¥2,980

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

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

Limited to 19 stones: Blue sapphire from Madagascar (medium blue, oval cut) Discounts available for multiple purchases Sale price¥2,980

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

【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 20 stones! Includes 2 Koshu Kiriko fire opals and 1 loose fire opal. Discounts available for multiple purchases. Sale price¥4,980

Limited to 9 sets Diamond Gacha 💎 Yellow Diamond Rough Stone and Loose Stone Set of 2 《Multiple Purchase Discounts Available》 Sale price¥2,980

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

[On sale 12/6 at 10 PM] Limited to 20 gems! Includes 6 red gemstones, including pigeon blood ruby rubies with AGL certificates. Discounts available for multiple purchases. Sale price¥6,980

Limited to 25 stones: 1 unheated yogo sapphire rough stone. Discounts available for multiple purchases. 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

Diamond loose/certificate transfer fee Sale price¥5,000

Limited to 17 stones: Tanzanian bicolor sapphire, loose stone (multiple purchase discounts available) Sale price¥4,580

Limited to 11 stones: One loose, unheated silky pink sapphire from Vietnam (2.0-2.5mm, with lots of inclusions) [Multiple purchase discounts available] Sale price¥1,980

Limited to 22 Sapphire Gacha (Includes Sakura In-Cut & Sakura Shape Sapphire, Bonus Hot Pink Sapphire) (Multiple Purchase Discounts Available) Sale price¥6,980

Limited to 10 stones: Koshu Precious Stone Kiriko "Broom" plusthree 45ct Dendritic Quartz Gacha (Includes 1 Copper Rutile in Quartz) (Multiple purchase discounts available) Sale price¥3,980

Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available Sale price¥4,980

[Available at 10 PM on November 3rd] [Limited Stock] Single Russian Oil-Free Emerald Loose Stone (2.1mm, Square Cut) [Multiple Purchase Discounts Available] Sale price¥5,980

[Jeweler's Tools] Limited Edition Chelsea Color Filter Emerald 2-Piece Set Sale price¥6,980

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

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.