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Birthstone list

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Sold out 1 sugarloaf cut London blue topaz 5mm

1 sugarloaf cut London blue topaz 5mm

Sold out Hessonite garnet 1 stone (molasses-like, octagonal cut)《Multiple purchase discount available》

Hessonite garnet 1 stone (molasses-like, octagonal cut)《Multiple purchase discount available》

Sold out アメジスト（5ctUP、チェッカーボード×クッション） - KARATZ STORE｜カラッツSTORE

Amethyst (5ctUP, checkerboard x cushion)

Sold out ハイアライトオパール（1.5ctUP） - KARATZ STORE｜カラッツSTORE

Hyalite Opal (1.5ctUP)

Sold out [On sale from 10pm on November 1st] Kasharai Amethyst 1 stone loose (3.5mm, round cut, February birthstone) {Multiple purchase discounts available}

[On sale from 10pm on November 1st] Kasharai Amethyst 1 stone loose (3.5mm, round cut, February birthstone) {Multiple purchase discounts available}

Sold out [On sale from 10/27 at 10pm] Limited to 4 stones Ice blue diamond (VS class equivalent, 2mm) 1 loose stone [Multiple purchase discounts available]

[On sale from 10/27 at 10pm] Limited to 4 stones Ice blue diamond (VS class equivalent, 2mm) 1 loose stone [Multiple purchase discounts available]
Sold out Pink Sapphire Gacha💎 (1 Padparadscha Sapphire 0.215ct with DGL Certificate) 1 Loose Stone {Multiple Purchase Discounts Available}

Pink Sapphire Gacha💎 (1 Padparadscha Sapphire 0.215ct with DGL Certificate) 1 Loose Stone {Multiple Purchase Discounts Available}
Sold out 1 Tanzania Windsor Sapphire (Multiple purchase discounts available)

1 Tanzania Windsor Sapphire (Multiple purchase discounts available)
Sold out Colombian mint color emerald 1 loose stone {Multiple purchase discount available}

Colombian mint color emerald 1 loose stone {Multiple purchase discount available}
Sold out [Limited 2 stones/Resale] Sea green diamond (treatment) (2mm, round cut, SI class equivalent) 1 stone loose

[Limited 2 stones/Resale] Sea green diamond (treatment) (2mm, round cut, SI class equivalent) 1 stone loose
Sold out [Limited 5 stones] Rare stone gacha 💎 Win Red Beryl, Alexandrite, Paraiba Tourmaline [Multiple purchase discount available]

[Limited 5 stones] Rare stone gacha 💎 Win Red Beryl, Alexandrite, Paraiba Tourmaline [Multiple purchase discount available]
Sold out 《Limited 5 stones》 Paraiba tourmaline from Brazil (Batalha mine, 2.2 x 1.7mm) 《Multiple purchase discount available》

《Limited 5 stones》 Paraiba tourmaline from Brazil (Batalha mine, 2.2 x 1.7mm) 《Multiple purchase discount available》

Sold out 『8月誕生石』ペリドット1石ルース（フロスト加工）《複数購入割引有》

"August birthstone" Peridot 1 stone loose (frosted)《Multiple purchase discount available》

Sold out 1 loose bicolor sapphire from Windsor, Tanzania (marquise cut, 4.5 x 2.5 mm)《Discount available for multiple purchases》

1 loose bicolor sapphire from Windsor, Tanzania (marquise cut, 4.5 x 2.5 mm)《Discount available for multiple purchases》
Sold out Almandine garnet, sky blue topaz, peridot 3 stone set loose (rose cut, 5mm)《Multiple purchase discount available》

Almandine garnet, sky blue topaz, peridot 3 stone set loose (rose cut, 5mm)《Multiple purchase discount available》
Sold out 1 stone blue tourmaline from Afghanistan (discount available for multiple purchases)

1 stone blue tourmaline from Afghanistan (discount available for multiple purchases)

Sold out YAG (yttrium aluminum garnet) 1 stone (pink, 5mm, round cut)《Multiple purchase discount available》

YAG (yttrium aluminum garnet) 1 stone (pink, 5mm, round cut)《Multiple purchase discount available》

Sold out YAG (yttrium aluminum garnet) 1 stone (blue gray, 6mm, round cut)

YAG (yttrium aluminum garnet) 1 stone (blue gray, 6mm, round cut)

Sold out オーストラリア産オパール ルース 1石

1 loose Australian opal (discount available for multiple purchases)

Sold out グリーンランド産アイスルビー 1石（ハートシェイプ,4mm）

Ice ruby ​​from Greenland 1 stone (heart shape, 4mm) Comes with original pouch

Sold out Mint green diamond (treatment, VS to SI class equivalent) 1 stone

Mint green diamond (treatment, VS to SI class equivalent) 1 stone

Sold out 【KEN氏】アリゾナ産ペリドット 1石 - カラッツSTORE

[Mr. KEN] Arizona peridot 1 stone loose (August birthstone)《Multiple purchase discount available》

Sold out コロンビア産エメラルド 1.400ct原石

Colombian emerald 1.40ct rough stone

Sold out 【12528364掲載】バイカラーサファイア 0.360ctルース

Bicolor sapphire 0.360ct loose

Sold out [Colorful] K18 diamond 0.55ct pendant (necklace)

[Colorful] K18 diamond 0.55ct pendant (necklace)

Sold out 【12523003掲載】ファイアオパール 0.769ctルース

Fire opal 0.769ct loose

Sold out ウォーターメロントルマリン 1石 - KARATZ STORE｜カラッツSTORE

Watermelon tourmaline loose 1 stone

Sold out [On sale from 10pm on November 1st] [Limited to 2 stones] 1 loose Kasharai amethyst (4.5mm, round cut, February birthstone) [Multiple purchase discounts available]

[On sale from 10pm on November 1st] [Limited to 2 stones] 1 loose Kasharai amethyst (4.5mm, round cut, February birthstone) [Multiple purchase discounts available]
Sold out [On sale from 10pm on November 1st] [Limited to 2 stones] 1 loose Kasharai amethyst (3.0mm, round cut, February birthstone) [Multiple purchase discounts available]

[On sale from 10pm on November 1st] [Limited to 2 stones] 1 loose Kasharai amethyst (3.0mm, round cut, February birthstone) [Multiple purchase discounts available]
Sold out [On sale from 10/20 at 10pm] {Limited to 2 stones} 1 loose needle-in topaz from Madagascar {Multiple purchase discounts available}

[On sale from 10/20 at 10pm] {Limited to 2 stones} 1 loose needle-in topaz from Madagascar {Multiple purchase discounts available}
Sold out Limited to 3 stones: 1 peridot green diamond loose stone (treated, 3mm, VS class, Chuho sorting) Multiple purchase discounts available

Limited to 3 stones: 1 peridot green diamond loose stone (treated, 3mm, VS class, Chuho sorting) Multiple purchase discounts available
Sold out [On sale from 10pm on 8/10] Limited to 2 stones: 1 London Blue Diamond (treated) loose stone (VS class equivalent, including round 3mm) [Multiple purchase discounts available]

[On sale from 10pm on 8/10] Limited to 2 stones: 1 London Blue Diamond (treated) loose stone (VS class equivalent, including round 3mm) [Multiple purchase discounts available]

Sold out シルキーダイヤモンド 2.6mm/0.081ctルース

Silky Diamond 2.6mm/0.081ct Loose
Sold out Limited to 4 sets: Brazilian emerald (sugarloaf cut) & Zambian emerald 2 stone set (multiple purchase discounts available)

Limited to 4 sets: Brazilian emerald (sugarloaf cut) & Zambian emerald 2 stone set (multiple purchase discounts available)
Sold out Sapphire Gacha💎 Sri Lankan Sapphire (Hexagonal Cut) 1 Loose Stone {Multiple Purchase Discounts Available}

Sapphire Gacha💎 Sri Lankan Sapphire (Hexagonal Cut) 1 Loose Stone {Multiple Purchase Discounts Available}
Sold out Sapphire Gacha💎 Sri Lankan Blue Sapphire (Hexagonal Cut) 1 Loose Stone {Multiple Purchase Discounts Available}

Sapphire Gacha💎 Sri Lankan Blue Sapphire (Hexagonal Cut) 1 Loose Stone {Multiple Purchase Discounts Available}
Sold out Limited to 3 stones: 1 Tanzanian pyrope almandine garnet (princess cut) loose stone (multiple purchase discounts available)

Limited to 3 stones: 1 Tanzanian pyrope almandine garnet (princess cut) loose stone (multiple purchase discounts available)
Sold out Limited to 4 stones: 1 loose Brazilian blue tourmaline stone. Discounts available for multiple purchases.

Limited to 4 stones: 1 loose Brazilian blue tourmaline stone. Discounts available for multiple purchases.
Sold out [Special offer] [Limited to 2 stones] 1 Australian black opal loose stone

[Special offer] [Limited to 2 stones] 1 Australian black opal loose stone
Sold out Bankacha sapphire 1 stone loose (black star sapphire)《Multiple purchase discount available》

Bankacha sapphire 1 stone loose (black star sapphire)《Multiple purchase discount available》
Sold out [Limited to 10 stones] Brazilian Santa Maria Aquamarine 1 loose stone [Multiple purchase discounts available]

[Limited to 10 stones] Brazilian Santa Maria Aquamarine 1 loose stone [Multiple purchase discounts available]
Sold out Afghanistan Lapis Lazuli 1 Stone Loose {Multiple purchase discount available}

Afghanistan Lapis Lazuli 1 Stone Loose {Multiple purchase discount available}
Sold out アメリカ産アントヒルガーネット 0.306ctルース

American Anthill Garnet 4mm/0.306ct Loose Stone
Sold out 1 bicolor sapphire (cabochon cut)《Multiple purchase discount》

1 bicolor sapphire (cabochon cut)《Multiple purchase discount》
Sold out 《訳あり》サンジェ氏カット（ウォーターメロントルマリン・イエローサファイア・オレゴンサンストーンなど）

Limited to 9 stones, with a flaw, Sanjay cut (watermelon tourmaline, yellow sapphire, Oregon sunstone, etc.), multiple purchase discounts available
Sold out ブラジル産パライバトルマリンインクォーツ 0.565ctルース

Brazilian Paraiba tourmaline in quartz 0.565ct loose
Sold out 《限定5石》《訳あり》サファイア1石ルース（ロゼンジカット）《複数購入割引有》

《Limited 5 stones》《Explanation》1 sapphire stone loose (lozenge cut)《Multiple purchase discount available》
Sold out メキシコ産ファイアオパール 0.266ctルース

Mexican Fire Opal 0.266ct Loose (Faceted Cut)

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