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ブラジル産グリーンベリル 0.559ctルース

[For sale on May 16th at 10 PM] Brazilian Emerald Cat's Eye 0.559ct Loose Stone with Appraisal Report Sale price¥9,800
ブラジル産エメラルドキャッツアイ0.459ctルース

[On Sale May 16th, 10 PM JST] Brazilian Emerald Cat's Eye 0.459 ct Loose Gemstone with Certificate Sale price¥9,800
パキスタン産カイヤナイト 1.181ctルース

[On sale June 3rd, 10 PM JST] Nepali Bicolor Green Kyanite 1.181ct Loose Stone Sale price¥9,800
Brazilian alexandrite 0.051ct loose

Brazilian alexandrite 0.051ct loose Sale price¥9,800
モザンビーク産ピンクサファイア 0.276ctルース

Mozambique Pink Sapphire 0.276ct Loose (Hot Pink Sapphire) Sale price¥9,800
ゴーシェナイト 0.905ctルース

Goshenite 6.1mm/0.905ct loose stone Sale price¥7,980
パープルスピネル 0.323ctルース

Purple Spinel 4.3mm/0.323ct Loose Stone Sale price¥6,980
ヴァイオレットスピネル 0.301ctルース

Violet spinel 0.301ct loose Sale price¥6,980
Pink tourmaline 0.466ct loose

Pink tourmaline 0.466ct loose Sale price¥8,800
Tanzania Zoisite 0.278ct loose stone

Tanzania Zoisite 0.278ct loose stone Sale price¥7,980
ゾイサイト 0.216ctルース

Zoisite 0.216ct loose stone (heart shape) Sale price¥7,980
ゾイサイト 0.162ctルース

Zoisite 0.162ct loose stone (heart shape) Sale price¥7,980
ゾイサイト 0.247ctルース

Zoisite 0.247ct loose stone (heart shape) Sale price¥7,980
スペイン産アンダリュサイト 0.425ctルース

[On Sale June 3rd, 10 PM JST] Andalusite from Spain, 0.425 ct Loose Stone Sale price¥9,800
スペイン産アンダリュサイト 0.598ctルース

[On sale May 24th at 10 PM] Andalusite from Spain 0.598ct Loose Gemstone Sale price¥9,800
スペイン産アンダリュサイト 0.478ctルース

[On sale May 24th at 10 PM] Andalusite from Spain, 0.478ct loose stone Sale price¥8,800
スペイン産アンダリュサイト 0.469ctルース

[On sale May 24, 10 PM JST] Spanish Andalusite 5.0mm/0.469ct Loose Stone Sale price¥9,800
ブラジル産カラーシフトアメジスト 1.865ctルース

[On sale May 24th, 10 PM JST] Brazilian Color-Shift Amethyst 1.865ct Loose Gemstone Sale price¥9,800
中国・湖南省シンシャ（辰砂・シナバー） 0.629ctルース

[Sales start 10 PM on May 22] Cinnabar (辰砂) from Hunan, China, 0.629 ct loose, with certificate Sale price¥9,800
中国・湖南省シンシャ（辰砂・シナバー） 0.469ctルース

[On sale May 17th at 10 PM] Chinese Hunan Cinnabar 0.469ct Loose Stone with Certificate of Authenticity Sale price¥9,800
合成アレキサンドライト 0.379ctルース

[On sale May 22nd at 10 PM] Synthetic Alexandrite 4.3mm/0.379ct Loose Stone Sale price¥9,800
合成アレキサンドライト 0.228ctルース

[On sale May 21st, 10 PM JST] Synthetic Alexandrite 0.228ct Loose Stone Sale price¥9,800
ブラジル産ラベンダークォーツ（スコロライト） 0.952ctルース

[On Sale May 21st, 10 PM] Brazilian Lavender Quartz (Scorolite) 0.952ct Loose Stone Sale price¥9,800
オーストラリア産ブラックオパール 0.325ctルース

[On sale 5/22 at 10 PM] Australian Black Opal 0.325ct Loose Stone Sale price¥9,800
マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.082ctルース

[On sale May 12th at 10 PM] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.082ct Loose Stone Sale price¥8,800
タンザニア産タンザナイト 0.295ctルース

[On sale May 12th at 10 PM] Tanzanian Tanzanite 4.1mm/0.295ct Loose Gemstone Sale price¥9,800
[Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones

[Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones Sale price¥6,980
[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery

[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery Sale price¥6,980
Ice blue diamond 1.2mm or 2.0mm 1 stone (VS class equivalent, round cut) {Multiple purchase discount available}

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

[Option] Certificate issuance fee Sale priceFrom ¥2,750
H&C (Heart & Cupid) Diamond 2.0mm Loose (VS Class, DG Class, 2mm Melee Diamonds) {Multiple Purchase Discounts Available}

H&C (Heart & Cupid) Diamond 2.0mm Loose (VS Class, DG Class, 2mm Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥7,980
[Jeweler's Tools] White penlight (for loose), loose 3-piece set

[Jeweler's Tools] White penlight (for loose), loose 3-piece set Sale price¥5,980
1 stone of Brazilian blue tourmaline (3 x 4 mm pear shape/oval cut/3 x 5 mm pear shape/4 x 5 mm oval cut)《Discount available for multiple purchases》

1 stone of Brazilian blue tourmaline (3 x 4 mm pear shape/oval cut/3 x 5 mm pear shape/4 x 5 mm oval cut)《Discount available for multiple purchases》 Sale priceFrom ¥2,980
[Sales begin Wednesday, April 29th at 10 PM JST] TV Anime Dr. STONE x Gem Specialist KARATZ Collaboration - Logo Loupe and Strap Set Used by Gemologists (with explanation card)

[Sales begin Wednesday, April 29th at 10 PM JST] TV Anime Dr. STONE x Gem Specialist KARATZ Collaboration - Logo Loupe and Strap Set Used by Gemologists (with explanation card) Sale price¥6,600
Limited to 7 sets: Gemstone Encyclopedia Playing Cards + Gemstone Lucky Bag (worth 10,000 yen) with 4 Stones

Limited to 7 sets: Gemstone Encyclopedia Playing Cards + Gemstone Lucky Bag (worth 10,000 yen) with 4 Stones Sale price¥6,000
Top Quality: Brazilian Alexandrite 1 Stone Loose (2.0mm, Hematita Mine) Multiple Purchase Discounts Available

Top Quality: Brazilian Alexandrite 1 Stone Loose (2.0mm, Hematita Mine) Multiple Purchase Discounts Available Sale price¥9,800
クッションカットのブラジル産インペリアルトパーズ1石ルース（3mm）《複数購入割引有》

Cushion cut Brazilian imperial topaz 1 stone loose (3mm)《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}

1 blue fluorescent diamond (H&C, 3EX, VS-SI class equivalent, 2.0mm) {Multiple purchase discount available} Sale price¥8,980
スリランカ産サファイア《ラトゥナプラ》1石ルース(平均0.75ct)

Gem Gacha💎 Sri Lankan Sapphire《Ratnapura》1 loose stone (average 0.75ct)《Multiple purchase discount available》 Sale price¥5,980
コロンビア産エメラルド ルース・原石2石セット（ラウンドカット3mm）

Colombian emerald loose rough stone set of 2 stones (round cut 3mm)《Multiple purchase discount available》 Sale price¥6,980
Limited quantity: Sri Lankan 2mm sapphire (sapphire) 1 loose stone (with identification certificate for all stones) Discounts for multiple purchases

Limited quantity: Sri Lankan 2mm sapphire (sapphire) 1 loose stone (with identification certificate for all stones) Discounts for multiple purchases Sale price¥5,980
《17色》宝石ガチャガチャ💎新作モアッサナイト6.5mm（H&C ハート＆キューピッド）💎《複数購入割引有》 - カラッツSTORE

《17 colors》Gem Gacha💎Synthetic Moissanite 1 stone loose (H&C Heart & Cupid, 6.5mm)💎《Multiple purchase discount available》 Sale price¥5,980
Limited to 20 stones: Brazilian Paraiba tourmaline (cabochon cut, approximately 2.2 mm) [Multiple purchase discounts available]

Limited to 20 stones: Brazilian Paraiba tourmaline (cabochon cut, approximately 2.2 mm) [Multiple purchase discounts available] Sale price¥9,800
Limited to 25 stones: 1 Brazilian Santa Maria aquamarine (round cut, approx. 3.0 mm) Multiple purchase discounts available

Limited to 25 stones: 1 Brazilian Santa Maria aquamarine (round cut, approx. 3.0 mm) Multiple purchase discounts available Sale price¥5,980
【Sale starts 4/ at 10 PM JST】《Limited to 15 pieces》Tucson Gem Gacha 💎 Benitoite, Italian Leucite, Pakistani Lazulite, etc. 《Multi-item discount available》

【Sale starts 4/ at 10 PM JST】《Limited to 15 pieces》Tucson Gem Gacha 💎 Benitoite, Italian Leucite, Pakistani Lazulite, etc. 《Multi-item discount available》 Sale price¥5,980
Campaign Special Offer: Only 2 stones left! December Birthstone Tanzanite, 1 Loose Stone (5x7mm, Oval Cut). Multiple Purchase Discount Available.

Campaign Special Offer: Only 2 stones left! December Birthstone Tanzanite, 1 Loose Stone (5x7mm, Oval Cut). Multiple Purchase Discount Available. Sale price¥8,800
Limited to 32 stones: Namibian Mandarin Garnet, 1 loose stone (round cut, 2.5mm) [Multiple purchase discounts available]

Limited to 32 stones: Namibian Mandarin Garnet, 1 loose stone (round cut, 2.5mm) [Multiple purchase discounts available] Sale price¥5,980
タンザナイト原石・ルース2石セット（シュガーローフカット）

Tanzanite raw stone/loose 2 stone set (sugar loaf cut)《Multiple purchase discount available》 Sale price¥6,980

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.