Birthstone list

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

K18タンザナイト1ct リング - KARATZ STORE｜カラッツSTORE

K18 tanzanite 1ct ring Sale price¥79,800

デマントイドガーネット 200.00ct原石 - KARATZ STORE｜カラッツSTORE

Demantoid garnet 200.00ct rough stone Sale price¥298,000

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

トルマリン 0.672ctルース - KARATZ STORE｜カラッツSTORE

Tourmaline 0.672ct loose Sale price¥3,980

カラーチェンジガーネット 0.821ctルース - KARATZ STORE｜カラッツSTORE

[No actual item, currently searching for inventory] Color change garnet 0.821ct loose stone Sale price¥29,800

[KEN] Fire opal from Mexico 3.782ct loose Sale price¥9,800

バイカラートルマリン 0.401ctルース - KARATZ STORE｜カラッツSTORE

{Yurakucho Marui 2024112 takeout} Bicolor tourmaline 0.401ct loose stone Sale price¥12,800

アメジスト 34.015ctルース - KARATZ STORE｜カラッツSTORE

Amethyst 34.015ct loose Sale price¥14,800

アメジスト 27.666ctルース（2月誕生石） - KARATZ STORE｜カラッツSTORE

Amethyst 27.666ct loose (horsehead cut) Sale price¥14,800

アメジスト 30.78ctルース - KARATZ STORE｜カラッツSTORE

Amethyst 30.78ct loose Sale price¥19,800

カラーチェンジガーネット 0.733ctルース - KARATZ STORE｜カラッツSTORE

Color change garnet 0.733ct loose Sale price¥19,800

カラーチェンジガーネット 0.611ctルース - KARATZ STORE｜カラッツSTORE

《Yurakucho Marui 2024112 takeout》Color change garnet 0.611ct loose stone Sale price¥15,800

トルマリン 0.747ctルース - KARATZ STORE｜カラッツSTORE

Tourmaline 0.747ct loose Sale price¥5,980

ブラジル産パライバトルマリン 0.49ctルース - KARATZ STORE｜カラッツSTORE

Paraiba tourmaline from Brazil 0.49ct loose Sale price¥45,800

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

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

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Gem Gacha💎 Dragon Garnet 1 stone (4mm to max 7.5mm)

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【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》

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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》

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[August birthstone] Peridot raw stone/loose 2 stone set《Multiple purchase discount available》

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1 bicolor tourmaline (faceted cut)

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「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)

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1 stone demantoid garnet loose (radiant cut) from Namibia《Discount available for multiple purchases》

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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》

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Bi-color tourmaline gacha💎In addition, one out of every two people will win a watermelon tourmaline (multiple purchase discount available)

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Ametrine 1 stone (approximately 60~70ct)《Discount available for multiple purchases》

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1 star flower cut beryllium diffused sapphire (September birthstone)

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

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

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Watermelon tourmaline rough stone 1 stone《Multiple purchase discount available》

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1 Bekily Blue Garnet from Madagascar (2mm, round cut)《Multiple purchase discounts available》

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[Cat cut] Amethyst (8mm)

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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)

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[Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Literary Ring [Akutagawa Ryunosuke Model] {Smoky Quartz, London Blue Topaz}

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Dragon Garnet 1 stone (3.0mm, round cut)《Discount available for multiple purchases》

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

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1 Trapiche diamond (some fluorescent green)

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《再入荷》シュガーローフカットのアルマンディンガーネット1石 5mm - カラッツSTORE

[Restocked] Sugarloaf cut almandine garnet 1 stone 5mm

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

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Set of 2 to 5 stones such as garden quartz and tourmaline in quartz

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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]

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Dragon Garnet x 1 (3.5mm, round cut) {Multiple purchase discount available}

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1 dragon garnet stone (4.5mm, round cut)

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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)

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Colombian trapiche emerald (reverse trapiche)

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