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5 major gems

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ルビー 0.213ctルース

Ruby 0.213ct loose Sale price¥7,980
北海道産UVオパール 7.860ctルース

(Fluorescent photo) [Published in 12532441] UV opal from Hokkaido 7.860ct loose with emblem Sale price¥8,800
【12530741掲載】オパール 1.020ctルース

Opal 1.020ct loose Sale price¥29,800
ダイヤモンド 2.810ct原石

Diamond 2.810ct rough stone Sale price¥9,800
エメラルドキャッツアイ 0.417ctルース

Colombian emerald cat's eye 0.417ct loose Sale price¥39,800
スライストラピッチェダイヤモンド 0.228ctルース

[On sale at 10pm on August 19th] Sliced ​​Trapiche Diamond 0.228ct Loose Sale price¥18,800
メキシコ産カンテラオパール 2.125ctルース

[On Sale at 10 PM on August 17th] Mexican Cantera Opal 2.125ct Loose Sale price¥39,800
メキシコ産カンテラオパール 5.882ctルース

[On Sale at 10 PM on August 16th] Mexican Cantera Opal 5.882ct Loose Sale price¥39,800
イエローサファイア 0.300ctルース

[8/16 22:00 Sale] Sri Lankan Yellow Sapphire 0.300ct Loose Sale price¥15,800
非加熱パパラチアサファイア 3.9mm/0.290ctルース GIA

[On Sale at 10 PM on August 16th] Unheated Padparadscha Sapphire 3.9mm/0.290ct Loose GIA Sale price¥55,800
ソルトアンドペッパーダイヤモンド 5.2mm/0.863ctルース（カボションカット）

Salt and Pepper Diamond 5.2mm/0.863ct Loose Cabochon Cut Diamond (Available August 17th at 10 PM) Sale price¥98,000
ロシア産ノンオイルエメラルド 0.570ctルース

[On Sale at 10 PM on August 16th] 0.570ct Loose Oil-Free Russian Emerald, GIA Sale price¥298,000
Pt950 バイカラーサファイア 0.398ct リング

[On sale at 10pm on August 16th] Pt950 Tanzanian Bicolor Sapphire 0.398ct Paraiba Tourmaline Ring Sale price¥128,000
K18/Pt950 ノンオイルエメラルド 0.1ct リング

[Available at 10 PM on August 16th] 18K/Pt950 Colombian Oil-Free Emerald 3.2mm/0.10ct Ring, GIA Sale price¥128,000
スリランカ産ツインスターサファイア 3.242ctルース

[Available at 10 PM on August 15th] Sri Lankan Twin Star Sapphire 3.242ct Loose Sale price¥59,800
【カメリアカット】オパール 14mmルース ワッペン付

[Available at 10 PM on August 13th] [Camellia Cut] Ethiopian Opal 5.083ct/14mm Loose Sale price¥69,800
K18YGコロンビア産エメラルド0.062ct・ダイヤモンドリング

[Available at 10 PM on August 12th] 18K Yellow Gold Colombian Emerald 0.062ct Diamond Ring Sale price¥79,800
K18YG ミャンマー産翡翠（ヒスイ） 0.434ct・エメラルドリング

[Available from 10 PM on August 12th] 18K Yellow Gold Myanmar Jadeite 0.434ct Emerald Ring Sale price¥89,800
[On Sale at 10 PM on August 11th] Afghanistan Oil-Free Emerald 0.100ct Loose GIA

[On Sale at 10 PM on August 11th] Afghanistan Oil-Free Emerald 0.100ct Loose GIA Sale price¥98,000
ダイヤモンド（H&C） 3.8mm/0.208ctルース(G, IF, 3Excellent H&C)

[Available from 10 PM on August 11th] 3.8mm/0.208ct Internally Flawless Diamond (H&C) Loose Stone (G, IF, 3 Excellent H&C) Sale price¥69,800
コロンビア産エメラルド 17.581ct原石　日独鑑

[8/11 22:00 Sale] Colombian Emerald 17.581ct Rough Stone, Japan-Germany Qualification Sale price¥45,800
[On Sale at 10 PM on August 11th] 0.060ct Loose GIA Emerald from Madagascar, No Oil

[On Sale at 10 PM on August 11th] 0.060ct Loose GIA Emerald from Madagascar, No Oil Sale price¥69,800
メキシコ産ファイアオパール（ファセットカット） 0.359ctルース

[On Sale at 10 PM on August 20th] Mexican Fire Opal (Faceted) 0.359ct Loose Sale price¥9,800
メキシコ産ファイアオパール（ファセットカット） 0.167ctルース

[On Sale at 10 PM on August 20th] Mexican Fire Opal (Faceted) 0.167ct Loose Sale price¥8,800
メキシコ産ファイアオパール（ファセットカット） 0.207ctルース

[12560183] Mexican Fire Opal (Faceted) 0.207ct Loose Sale price¥12,800
メキシコ産ファイアオパール（ファセットカット） 0.515ctルース

[On Sale at 10 PM on August 20th] Mexican Fire Opal (Faceted) 0.515ct Loose Sale price¥12,800
コロンビア産エメラルド 6.590ct原石

[On Sale at 10 PM on August 7th] Colombian Emerald Rough Stone 6.590ct Sale price¥15,800
オーストラリア産ボルダーオパール 13.190ctルース

Australian boulder opal 13.190ct loose Sale price¥18,800
【12542836掲載】グリーンオパール 15.950ctルース

Green opal 15.950ct loose Sale price¥29,800
南アフリカ産グリーンダイヤモンド原石（メイカブル） 0.298ctルース

South African green diamond rough (makeable) 0.298ct loose Sale price¥69,800
カンテラオパール 14.581ctルース

Cantera opal 14.581ct loose Sale price¥22,800
オパール 21.584ctルース 日独

Opal 21.584ct loose Japanese and German Sale price¥8,800
【KEN氏】バイカラーサファイア 0.853ctルース - カラッツSTORE

Bicolor sapphire 0.853ct loose stone Sale price¥9,800
モンタナサファイア 1.9mm/0.033ctルース

Montana Sapphire 1.9mm/0.033ct loose Sale price¥4,980
《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
[Resale] [Jeweler's Tools] Black Light, 3 Loose Stones (Ruby, Red Spinel, Oil in Quartz) with Rechargeable Battery

[Resale] [Jeweler's Tools] Black Light, 3 Loose Stones (Ruby, Red Spinel, 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
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
【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
On sale from 10 PM on Saturday, August 16th: "PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device-Inspired Ring with Inspector Design [Tsunemori Akane Model] with Pink Diamond

On sale from 10 PM on Saturday, August 16th: "PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device-Inspired Ring with Inspector Design [Tsunemori Akane Model] with Pink Diamond Sale priceFrom ¥29,800
ベリリウム拡散処理サファイア1石（約2.5mm,ラウンドカット）

1 beryllium diffused sapphire stone (approximately 2.5mm, round cut)《Multiple purchase discounts available》 Sale price¥1,580
Rose cut diamond 1.2mm x 1 stone (VS-SI class, DH color, melee diamonds) {Multiple purchase discounts available}

Rose cut diamond 1.2mm x 1 stone (VS-SI class, DH color, melee diamonds) {Multiple purchase discounts available} Sale price¥2,980
Gem Gacha💎 Cat Set (1 gemstone + 2 sapphires) {Multiple purchase discounts available}

Gem Gacha💎 Cat Set (1 gemstone + 2 sapphires) {Multiple purchase discounts available} Sale price¥3,333
H&C (Hearts & Cupids) Diamond 1.2mm Loose (VS Class, DG Class, Melee Diamonds) {Multiple Purchase Discounts Available}

H&C (Hearts & Cupids) Diamond 1.2mm Loose (VS Class, DG Class, Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥3,980
Diamond 1.2mm (VS class, DG color, round cut, melee diamond) 1 loose stone {Multiple purchase discounts available}

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

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

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の取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

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.