• Login/New registration
  • All items
  • FAQ
  • inquiry
  • See reviews

5 major gems

Sort by
【12523066掲載】サファイア 1.600ct原石

Sapphire 1.600ct rough stone Sale price¥4,980
【12523002掲載】ファイアオパール 0.473ctルース

Fire opal 0.473ct loose Sale price¥8,800
【12522965掲載】イエローサファイア 0.231ctルース

Yellow sapphire 0.231ct loose Sale price¥4,980
Bicolor sapphire 0.302ct loose

Bicolor sapphire 0.302ct loose Sale price¥6,980
Hyalite Opal 4.340ct rough stone

Hyalite Opal 4.340ct rough stone Sale price¥34,800
Hyalite Opal 3.400ct rough stone

Hyalite Opal 3.400ct rough stone Sale price¥25,800
Fancy Deep Yellowish Green Diamond (Treatment) 1.570ct Loose (FANCY DEEP YELLOWISH GREEN, VS2) with GIA

Fancy Deep Yellowish Green Diamond (Treatment) 1.570ct Loose (FANCY DEEP YELLOWISH GREEN, VS2) with GIA Sale price¥398,000
【12522867掲載】イエローサファイア 1.110ctルース

Yellow sapphire 1.110ct loose Sale price¥19,800
【11522807掲載】エメラルド 0.104ctルース

Emerald 0.104ct loose (sugar loaf) Sale price¥16,800
【12521824掲載】ファイアオパール 0.830ctルース

Fire opal 0.830ct loose Sale price¥9,800
トラピッチェルビー 1石 - KARATZ STORE｜カラッツSTORE

Trapichell Bee 1 stone《Multiple purchase discount available》 Sale price¥5,980
イエローダイヤモンド 0.462ctルース(FANCY DEEP BROWNISH GREENISH YELLOW, I1) - KARATZ STORE｜カラッツSTORE

Yellow Diamond 0.462ct Loose (FANCY DEEP BROWNISH GREENISH YELLOW, I1) Sale price¥39,800
【32500793掲載】イエローダイヤモンド 0.428ctルース(FANCY DEEP BROWNISH GREENISH YELLOW, I1)

Yellow Diamond 0.428ct Loose (FANCY DEEP BROWNISH GREENISH YELLOW, I1) Sale price¥29,800
ブラックオパール 2.530ctルース

Black opal 2.530ct loose stone from Yurakucho Marui 2024112 Sale price¥29,800
Australian black opal 0.480ct loose

Australian black opal 0.480ct loose Sale price¥8,800
ブルーオパール 1.70ctルース - KARATZ STORE｜カラッツSTORE

Blue opal 1.70ct loose Sale price¥16,800
ブルーオパール 1.64ctルース - KARATZ STORE｜カラッツSTORE

Blue opal 1.64ct loose Sale price¥14,800
ブルーオパール 1.53ctルース - KARATZ STORE｜カラッツSTORE

Blue opal 1.53ct loose Sale price¥13,800
ブルーオパール 1.50ctルース - KARATZ STORE｜カラッツSTORE

Blue opal 1.50ct loose Sale price¥11,800
合成オパール 3.620ctルース - KARATZ STORE｜カラッツSTORE

Synthetic opal 3.620ct loose Sale price¥9,800
ファイアオパール 5.827ctルース - KARATZ STORE｜カラッツSTORE

Fire opal 5.827ct loose Sale price¥22,800
[KEN] Fire opal from Mexico 3.782ct loose

[KEN] Fire opal from Mexico 3.782ct loose Sale price¥9,800
イエローダイヤモンド 0.190ctルース(FANCY DEEP ORANGY YELLOW, SI2) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.190ct loose (FANCY DEEP ORANGY YELLOW, SI2) Sale price¥39,800
サファイア 2.273ct原石 - KARATZ STORE｜カラッツSTORE

Sapphire 2.273ct rough stone Sale price¥2,980
イエローダイヤモンド 0.206ctルース(FANCY DEEP ORANGY YELLOW, SI2) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.206ct loose (FANCY DEEP ORANGY YELLOW, SI2) Sale price¥29,800
Sold out 「起源がわかる 宝石大全」初版＆宝石小瓶 2点セット

[Resale due to popular demand] "Encyclopedia of gemstones that understand the origin" & 2 sapphire stone set (purchased in Chanthaburi, Thailand)

Sold out 【大人用】宝石磨きに挑戦してみよう「自分で出来る原石磨きセット」（初心者向け：バイカラーフローライト）・ボルダーオパール付※原石磨きコンテスト対象 ※

[For adults] Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for beginners: bicolor fluorite) with boulder opal *Subject to the rough stone polishing contest*

Sold out {3/31 Reception ends} "PSYCHO-PASS" x KARATZ collaboration jewelry Public Safety Bureau Criminal Investigation Division Device Image Ring, Inspector Design [Tsunemori Akane Model] {Pink Diamond}

{3/31 Reception ends} "PSYCHO-PASS" x KARATZ collaboration jewelry Public Safety Bureau Criminal Investigation Division Device Image Ring, Inspector Design [Tsunemori Akane Model] {Pink Diamond}

Sold out Gem Gacha💎Mexican Cantera Opal《Multiple Purchase Discount》

Gem Gacha💎Mexican Cantera Opal《Multiple Purchase Discount》

Sold out [Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}

[Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}

Sold out 【ジェムガチャ】宝石1石（ダイヤモンドH&C中宝ソ,ピンクダイヤモンド3.3mmUP,タンザニア産レッドサファイアなど）1石が当たる！さらに2個以上購入で10月誕生石「ペルー産ブルーオパール＆ブラジル産トルマリン2石セット」が必ず貰える《複数購入割引有》

【ジェムガチャ】宝石1石（ダイヤモンドH&C中宝ソ,ピンクダイヤモンド3.3mmUP,タンザニア産レッドサファイアなど）1石が当たる！さらに2個以上購入で10月誕生石「ペルー産ブルーオパール＆ブラジル産トルマリン2石セット」が必ず貰える《複数購入割引有》
Sold out サファイア原石 色違い2石（UVタイプ・マダガスカル産） - KARATZ STORE｜カラッツSTORE

Sapphire rough 2 stones in different colors (UV type, from Madagascar)《Multiple purchase discount available》

Sold out 「決定版 アンカットダイヤモンド」サイン入り初版本 ＆ダイヤモンド原石（グリーン蛍光）2点セット

"Definitive Uncut Diamond" by Kyoichi Suwa, signed first edition & 2-piece set of diamonds (hexagonal cut)

Sold out オパール 1石（オーバル、6×4mm） - KARATZ STORE｜カラッツSTORE

Opal 1 stone (oval, 6 x 4mm)《Multiple purchase discount available》

Sold out スター・フラワーカットのベリリウム拡散処理サファイア 1石《9月誕生石》

1 star flower cut beryllium diffused sapphire (September birthstone)

Sold out [Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Izumi Kyoka Model] Sky Blue Topaz Yellow Sapphire

[Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Izumi Kyoka Model] Sky Blue Topaz Yellow Sapphire

Sold out 《With translation》1 unheated silky pink sapphire from Vietnam (round cut) 《Discount available for multiple purchases》

《With translation》1 unheated silky pink sapphire from Vietnam (round cut) 《Discount available for multiple purchases》

Sold out 含浸ルビー・天然ルビー見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] 2-piece set for distinguishing impregnated rubies and natural rubies (discount available for multiple purchases)

Sold out バンカチャサファイア（ローズカット）1石《チャンタブリ買付品》

Bangkacha sapphire (rose cut) 1 stone (purchased in Chanthaburi)

Sold out トラピッチェダイヤモンド（一部蛍光グリーン）

1 Trapiche diamond (some fluorescent green)

Sold out [Only one left] 1 Opal (oval cut, 7 x 5 mm) {Multiple purchase discounts available}

[Only one left] 1 Opal (oval cut, 7 x 5 mm) {Multiple purchase discounts available}

Sold out Diamond gacha 💎Diamond gacha (treatment) where you can win a 12 stone set of color rings, ice blue diamonds, and purple diamonds (discount for multiple purchases available) [3,980 yen]

Diamond gacha 💎Diamond gacha (treatment) where you can win a 12 stone set of color rings, ice blue diamonds, and purple diamonds (discount for multiple purchases available) [3,980 yen]

Sold out バイカラーサファイア（プリンセスカット）1石 - KARATZ STORE｜カラッツSTORE

Bicolor sapphire (princess cut) 1 stone (discount available for multiple purchases)

Sold out コロンビア産トラピッチェエメラルド（逆トラピッチェ）

Colombian trapiche emerald (reverse trapiche)

Sold out ローズカットのエチオピア産オパール 4mm 1石《10月誕生石》

Rose cut Ethiopian opal 4mm 1 stone《October birthstone》

Sold out 【宝石商の道具】冷却ヒビ入れ染色クォーツ・天然エメラルド見分け2点セット - KARATZ STORE｜カラッツSTORE

[Jeweler's Tools] Cooling Cracked Dyed Quartz/Natural Emerald Identification 2-piece Set (Discount available for multiple purchases)

Sold out {3/31 Reception closes} "PSYCHO-PASS" x KARATZ collaboration jewelry: Public Safety Bureau Criminal Investigation Division Device Image Ring, Enforcer Design [Rokuitsuka Yayoi Model] {Ice Blue Sapphire}

{3/31 Reception closes} "PSYCHO-PASS" x KARATZ collaboration jewelry: Public Safety Bureau Criminal Investigation Division Device Image Ring, Enforcer Design [Rokuitsuka Yayoi Model] {Ice Blue Sapphire}

Sold out Diamond gacha💎Diamond gacha (treatment) where you can win purple diamonds and ice blue diamonds (multiple purchase discount available)

Diamond gacha💎Diamond gacha (treatment) where you can win purple diamonds and ice blue diamonds (multiple purchase discount available)

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.

KARATZ・Five Commitments