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ラブラドライト1石ルース（12×16mm）《複数購入割引有》

Labradorite 1 stone loose (12 x 16mm)《Multiple purchase discount available》 Sale price¥2,580
Caland "Semi-custom pinky ring frame"

Caland "Semi-custom pinky ring frame" Sale price¥69,800
Bizarro "Semi-custom ring setting"

Bizarro "Semi-custom ring setting" Sale price¥89,800
【宝石商の道具】冷却ヒビ入れ染色クォーツ色違い2石セット - カラッツSTORE

[Jeweler's Tools] Cooling Cracked Dyed Quartz Set of 2 Stones in Different Colors (Discount available for multiple purchases) Sale price¥2,980
1 stone of green opal from South Africa (discount available for multiple purchases)

1 stone of green opal from South Africa (discount available for multiple purchases) Sale priceFrom ¥2,980
【9/22 22時販売】《限定10石》通常59,800円の甲州貴石切子plusthree「昴」ファイアオパールや29,800円のKEN氏コントラルスオパールのメキシコ産オパールガチャ1石（北海道産ロードクロサイト1石付き）《複数購入割引有》

【9/22 22時販売】《限定10石》通常59,800円の甲州貴石切子plusthree「昴」ファイアオパールや29,800円のKEN氏コントラルスオパールのメキシコ産オパールガチャ1石（北海道産ロードクロサイト1石付き）《複数購入割引有》 Sale price¥6,980
《Limited to 12 Stones》Spanish Sphalerite Gacha 1 Stone Loose Gemstone《Bulk Purchase Discount Available》

《Limited to 12 Stones》Spanish Sphalerite Gacha 1 Stone Loose Gemstone《Bulk Purchase Discount Available》 Sale price¥3,980
《Limited to 23 Stones》Veilchenite Loose Stone from Pakistan (Avg. 0.04ct) 《Multiple Purchase Discount Available》

《Limited to 23 Stones》Veilchenite Loose Stone from Pakistan (Avg. 0.04ct) 《Multiple Purchase Discount Available》 Sale price¥4,980
"Limited to 14 stones" Fluorescent diamonds in rare colors such as white, orange, and green "Bulk purchase discounts available"

"Limited to 14 stones" Fluorescent diamonds in rare colors such as white, orange, and green "Bulk purchase discounts available" Sale price¥3,980
《Limited to 12 Stones》Madagascar Andesine-Labradorite (Rainbow Moonstone & Blue Moonstone) 2-Stone Set (Average 0.60ct)《Multiple Purchase Discount Available》

《Limited to 12 Stones》Madagascar Andesine-Labradorite (Rainbow Moonstone & Blue Moonstone) 2-Stone Set (Average 0.60ct)《Multiple Purchase Discount Available》 Sale price¥3,980
Limited to 10 stones: Cambodian Pink Zircon Loose Stone (Avg. 0.50ct) - Multiple Purchase Discount Available

Limited to 10 stones: Cambodian Pink Zircon Loose Stone (Avg. 0.50ct) - Multiple Purchase Discount Available Sale price¥3,980
[Available at 10 PM on February 2nd] Limited to 10 stones! Takeshi Yamamoto Cut Gemstone Gacha! Fire Flower Cut Rock Crystal and More! Discounts Available for Multiple Purchases!

[Available at 10 PM on February 2nd] Limited to 10 stones! Takeshi Yamamoto Cut Gemstone Gacha! Fire Flower Cut Rock Crystal and More! Discounts Available for Multiple Purchases! Sale price¥7,980
《Limited to 12 Stones》New Tucson Arrival: High-Quality Brazilian Dumortierite in Quartz (Faceted Cut)《Multiple Purchase Discount Available》

《Limited to 12 Stones》New Tucson Arrival: High-Quality Brazilian Dumortierite in Quartz (Faceted Cut)《Multiple Purchase Discount Available》 Sale price¥4,980
Limited to 10 stones: Australian Opal Lottery with Certificate of Authenticity (including Australian Black Opal) (plus 1 Mexican Fire Opal) (Multiple purchase discounts available)

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
[Sales end on 11/13 (Fri)] Anime "Assassination Classroom" x KARATZ Collaboration Irina Jelavic Model Ring

[Sales end on 11/13 (Fri)] Anime "Assassination Classroom" x KARATZ Collaboration Irina Jelavic Model Ring Sale price¥29,800
Limited Edition Synthetic Moissanite Gacha! 💎 Koshu Kiriko Plus Three Moissanite, Sange Cut, Pink, and Blue Moissanite Loose Stones Available. Multiple Purchase Discounts Available.

Limited Edition Synthetic Moissanite Gacha! 💎 Koshu Kiriko Plus Three Moissanite, Sange Cut, Pink, and Blue Moissanite Loose Stones Available. Multiple Purchase Discounts Available. Sale price¥4,980
Limited to 15 stones: Brazilian Silky Alexandrite Loose Stone (2.5-3.0mm, Round Cut) - Multiple Purchase Discounts Available

Limited to 15 stones: Brazilian Silky Alexandrite Loose Stone (2.5-3.0mm, Round Cut) - Multiple Purchase Discounts Available Sale price¥7,980
Limited Quantity: 1.5mm Pink Spinel from Myanmar (including Hot Pink Spinel) - Multiple Purchase Discounts Available

Limited Quantity: 1.5mm Pink Spinel from Myanmar (including Hot Pink Spinel) - Multiple Purchase Discounts Available Sale price¥2,580
Limited to 11 stones: Brazilian rhodonite in quartz (cabochon, 7.5-8.5mm) 1 loose stone. Discounts available for multiple purchases.

Limited to 11 stones: Brazilian rhodonite in quartz (cabochon, 7.5-8.5mm) 1 loose stone. Discounts available for multiple purchases. Sale price¥2,980
Nepalese Kyanite 1 stone loose (Royal Blue color, 4 x 6mm, oval cut) {Multiple purchase discount available}

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

Additional charge: Center stone size upgrade (3.01ct to 4.0ct) +¥20,000 Sale price¥20,000

Additional charge for resizing: +3,000 yen Sale price¥3,000
[Option] Paraiba Tourmaline component analysis sorting issuance fee

[Option] Paraiba Tourmaline component analysis sorting issuance fee Sale price¥5,000
[Available 10/2 at 10 PM] 《Limited to 16 stones》 Indian Andesine-Labradorite Gacha Loose Stone, Ojiki-cut (Avg. 1.3ct) 《Multi-purchase discounts available》

[Available 10/2 at 10 PM] 《Limited to 16 stones》 Indian Andesine-Labradorite Gacha Loose Stone, Ojiki-cut (Avg. 1.3ct) 《Multi-purchase discounts available》 Sale price¥2,580
【9/7 10:00 PM Sale】《Limited to 10 Stones》Diamond Gacha with a Chance to Win a Certified Diamond (All stones VS class or equivalent)《Multi-purchase discounts available》

【9/7 10:00 PM Sale】《Limited to 10 Stones》Diamond Gacha with a Chance to Win a Certified Diamond (All stones VS class or equivalent)《Multi-purchase discounts available》 Sale price¥3,980
[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"

[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
[On sale May 29th at 10 PM] "Checker x Sui" Koshu Kiseki Cut Mexican Fire Opal (usually 79,800 yen) Gacha with only 10 stones available. Win a Fire Opal (and receive one Contraluz!). [Multiple purchase discount available]

[On sale May 29th at 10 PM] "Checker x Sui" Koshu Kiseki Cut Mexican Fire Opal (usually 79,800 yen) Gacha with only 10 stones available. Win a Fire Opal (and receive one Contraluz!). [Multiple purchase discount available] Sale price¥3,980
1 Brazilian Euclase rough stone (discount available for multiple purchases)

1 Brazilian Euclase rough stone (discount available for multiple purchases) Sale price¥3,980
[Limited to 15 Stones] Madagascar Grandidierite 1 Stone Loose (Average 0.065ct) with All Stone Certificates of Authenticity [Multiple Purchase Discount Available]

[Limited to 15 Stones] Madagascar Grandidierite 1 Stone Loose (Average 0.065ct) with All Stone Certificates of Authenticity [Multiple Purchase Discount Available] Sale price¥9,800
《Only 3 stones left》 Win a Koshu Kiseki Kiriko "Akatsuki" (plus three), normally 45,800 yen, in this Scapolite Gacha 《Multi-purchase discount available》

《Only 3 stones left》 Win a Koshu Kiseki Kiriko "Akatsuki" (plus three), normally 45,800 yen, in this Scapolite Gacha 《Multi-purchase discount available》 Sale price¥4,980
Tucson New Arrivals / Limited to 28 Stones: Australian Andamooka Black Matrix Opal (Carbon Treated) 1 Loose Stone (Multi-purchase Discount Available)

Tucson New Arrivals / Limited to 28 Stones: Australian Andamooka Black Matrix Opal (Carbon Treated) 1 Loose Stone (Multi-purchase Discount Available) Sale price¥3,980
[On sale Wed, 9/30 at 6 PM] Anime "Overlord" x Jewelry Store KARATZ Collaboration A3 Clear Poster

[On sale Wed, 9/30 at 6 PM] Anime "Overlord" x Jewelry Store KARATZ Collaboration A3 Clear Poster Sale price¥1,980
Limited to 13 stones: Mexican Opal (Cabochon Cut) Gacha (Multiple purchase discounts available)

Limited to 13 stones: Mexican Opal (Cabochon Cut) Gacha (Multiple purchase discounts available) Sale price¥2,980
[Sales end 11/13 (Fri)] Anime "Assassination Classroom" x KARATZ Collaboration: Karasuma Tadaomi Model Ring

[Sales end 11/13 (Fri)] Anime "Assassination Classroom" x KARATZ Collaboration: Karasuma Tadaomi Model Ring Sale price¥25,800
[Sales end Fri, 11/13] "Assassination Classroom" x KARATZ Collaboration: Kaede Kayano Model Ring

[Sales end Fri, 11/13] "Assassination Classroom" x KARATZ Collaboration: Kaede Kayano Model Ring Sale price¥25,800
Limited Quantity: Myanmar Gray Spinel/Platinum Spinel (2.0mm, Round Cut) - Single Loose Stone (Multiple Purchase Discounts Available)

Limited Quantity: Myanmar Gray Spinel/Platinum Spinel (2.0mm, Round Cut) - Single Loose Stone (Multiple Purchase Discounts Available) Sale price¥4,980
Limited to 9 stones. All stones come with appraisal certificates. 1 loose zoisite stone (yellow, pink-brown, green, etc.). Discounts available for multiple purchases.

Limited to 9 stones. All stones come with appraisal certificates. 1 loose zoisite stone (yellow, pink-brown, green, etc.). Discounts available for multiple purchases. Sale price¥6,980
Limited to 14 stones: Brazilian dendritic quartz loose stone (average 7 carats) Multiple purchase discounts available

Limited to 14 stones: Brazilian dendritic quartz loose stone (average 7 carats) Multiple purchase discounts available Sale price¥2,980
Limited to 14 stones: 3mm single unheated sapphire from the Theppanawa mine in Sri Lanka. Discounts available for multiple purchases.

Limited to 14 stones: 3mm single unheated sapphire from the Theppanawa mine in Sri Lanka. Discounts available for multiple purchases. Sale price¥5,980
Limited to 10 stones: Madagascar Sapphirine (Sapphirine) Loose Stone (Multiple purchase discounts available)

Limited to 10 stones: Madagascar Sapphirine (Sapphirine) Loose Stone (Multiple purchase discounts available) Sale price¥5,980
Limited to 9 sets: Sri Lankan sapphire (3.0-3.5mm, round cut) and Sri Lankan glass body set of 2 stones. Discounts available for multiple purchases.

Limited to 9 sets: Sri Lankan sapphire (3.0-3.5mm, round cut) and Sri Lankan glass body set of 2 stones. Discounts available for multiple purchases. Sale price¥5,980
Limited to 15 stones! Green Oregon Sunstone rough stone from the United States 💎 Average 1.5ct [Multiple purchase discounts available]

Limited to 15 stones! Green Oregon Sunstone rough stone from the United States 💎 Average 1.5ct [Multiple purchase discounts available] Sale price¥5,980
April birthstone Morganite rough stone and loose stone set of 2 (from Nigeria) {Multiple purchase discounts available} {For beginners}

April birthstone Morganite rough stone and loose stone set of 2 (from Nigeria) {Multiple purchase discounts available} {For beginners} Sale price¥3,980
Spiritosa (with side stones) {Semi-custom ring setting}

Spiritosa (with side stones) {Semi-custom ring setting} Sale price¥94,800
Moloxite from Madagascar 1 stone loose (green apatite, pear-shaped cut)《Multiple purchase discounts available》

Moloxite from Madagascar 1 stone loose (green apatite, pear-shaped cut)《Multiple purchase discounts available》 Sale price¥2,980
《Limited to 10 stones》 Indian bag site 1 stone loose (average 2ct)《Multiple purchase discount available》

《Limited to 10 stones》 Indian bag site 1 stone loose (average 2ct)《Multiple purchase discount available》 Sale price¥6,980
“Bakuten!!” x KARATZ collaboration jewelry/onaga ring

“Bakuten!!” x KARATZ collaboration jewelry/onaga ring Sale priceFrom ¥25,800
【KEN氏】モンテブラサイト 1石（4.5mm,ラウンドカット） - カラッツSTORE

Brazilian Montebrasite 1 stone (4.5mm, round cut) (Multi-item discount 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.