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5 major gems

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Sold out Gem Gacha💎Rose cut diamond (fluorescent orange, green, yellow)

Gem Gacha💎Rose cut diamond (fluorescent orange, green, yellow)

Sold out 1 Ethiopian Opal (Baroque)《Discount available for multiple purchases》

1 Ethiopian Opal (Baroque)《Discount available for multiple purchases》

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

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

Sold out Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Gem Gacha💎 Trapiche Diamond (Sliced ​​Diamond) 1 stone {Multiple purchase discount available}

Sold out Gem Gacha💎Diamond (with fluorescence)💎(Maximum 0.265ct)

Gem Gacha💎Diamond (with fluorescence)💎(Maximum 0.265ct)

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,ピンクサファイア）《複数購入割引有》

Greenland Ice Ruby 1 stone (heart shape, 4mm, pink sapphire) {Multiple purchase discount available}

Sold out 【5月誕生石】コロンビア産エメラルド原石1石（平均1.1ct） - カラッツSTORE

[May birthstone] 1 rough Colombian emerald stone (average 1.1 ct)《Multiple purchase discounts available》

Sold out メキシコ産ウォーターオパール1石ルース《初心者向け》

1 stone loose water opal from Mexico《For beginners》

Sold out サファイア原石 1石（ブルー系） - KARATZ STORE｜カラッツSTORE

1 rough sapphire stone (blue)

Sold out Gem Gacha "April Birthstone"💎 Fluorescent Diamond (VS-SI class equivalent, treated, 3.75mm apple green color included) 1 stone {Multiple purchase discount available}

Gem Gacha "April Birthstone"💎 Fluorescent Diamond (VS-SI class equivalent, treated, 3.75mm apple green color included) 1 stone {Multiple purchase discount available}

Sold out ミャンマー・モゴック産非加熱ピンクサファイア結晶1石（原石）

1 unheated pink sapphire crystal from Mogok, Myanmar (raw stone)《Multiple purchase discounts available》

Sold out Limited to 12 stones: 1 bicolor sapphire (slice) from Windsor, Tanzania. Discounts available for multiple purchases.

Limited to 12 stones: 1 bicolor sapphire (slice) from Windsor, Tanzania. Discounts available for multiple purchases.
Sold out ジェムガチャ『4月誕生石』💎ローズカットの蛍光ダイヤモンド1石《複数購入割引有》

Gem Gacha "April Birthstone"💎1 rose-cut fluorescent diamond

Sold out 《残り4石》ジェムガチャ💎ジンバブエ産ソーヤブルダイヤモンド1石（正八面体,VS~SIクラス相当） - カラッツSTORE

Gem Gacha💎1 Zimbabwe sawable diamond (regular octahedron, VS~SI class equivalent)

Sold out グリーンランド産ルビー 1石（ラウンドカット,2mm）

1 Ruby from Greenland (round cut, 2mm) with certificate

Sold out 10月誕生石「オパール」3石セット（メキシコ産ハイアライトオパール・オーストラリア産&エチオピア産オパール）《初心者向け》 - カラッツSTORE

October birthstone "Opal" 3-stone set (Hyalite opal from Mexico, Opal from Australia & Ethiopia)《For beginners》《Discount for multiple purchases available》

Sold out Gem Gacha 💎 Bicolor Sapphire 💎

Gem Gacha 💎 Bicolor Sapphire 💎

Sold out Bi-color sapphire from Tanzania 1 stone loose《Discount available for multiple purchases》

Bi-color sapphire from Tanzania 1 stone loose《Discount available for multiple purchases》

Sold out Limited to 13 stones! Sapphire Gacha! 1 loose unheated Sri Lankan sapphire stone. Multiple purchase discounts available.

Limited to 13 stones! Sapphire Gacha! 1 loose unheated Sri Lankan sapphire stone. Multiple purchase discounts available.
Sold out Limited to 10 stones: Blue diamond rough and loose stone set of 2 (treated) Multiple purchase discount

Limited to 10 stones: Blue diamond rough and loose stone set of 2 (treated) Multiple purchase discount
Sold out Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Light Pink) 1 stone loose (multiple purchase discount available)

Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Light Pink) 1 stone loose (multiple purchase discount available)
Sold out [For beginners in opal]《Limited to 8 sets》October birthstone opal 3 stone set (from Australia, Peru, South Africa)《Multiple purchase discount available》

[For beginners in opal]《Limited to 8 sets》October birthstone opal 3 stone set (from Australia, Peru, South Africa)《Multiple purchase discount available》

Sold out 《限定10石》エチオピア産ブラックオパール（加熱処理）1石ルース《複数購入割引有》

《Limited to 10 stones》Ethiopian black opal (includes heat treatment and identification instructions) 1 stone loose《Discount available for multiple purchases》
Sold out Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Vivid Pink) 1 stone loose (multiple purchase discount available)

Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Vivid Pink) 1 stone loose (multiple purchase discount available)
Sold out [With translation] Pink diamond (0.12ctUP, 3.0mm-3.5mm, round cut) 1 stone loose

[With translation] Pink diamond (0.12ctUP, 3.0mm-3.5mm, round cut) 1 stone loose

Sold out Diamond Gacha💎1 pink diamond [all Fancy Purple Pink] (all items sorted)💎《Multiple purchase discount available》

Diamond Gacha💎1 pink diamond [all Fancy Purple Pink] (all items sorted)💎《Multiple purchase discount available》

Sold out 《限定7点》ブラジル産エメラルドキャッツアイ1石（平均1.01ct）《複数購入割引有》

1 Brazilian emerald cat's eye stone (average 1.01ct)《Multiple purchase discounts available》

Sold out Diamond gacha💎Fancy cut brown diamonds and FancyDarkBrown diamonds (with medium treasure chest)《Multiple purchase discount available》

Diamond gacha💎Fancy cut brown diamonds and FancyDarkBrown diamonds (with medium treasure chest)《Multiple purchase discount available》

Sold out 1 rose cut diamond (VS-SI class equivalent, 3.0mm)《Multiple purchase discount available》

1 rose cut diamond (VS-SI class equivalent, 3.0mm)《Multiple purchase discount available》

Sold out Gem Gacha "April Birthstone" 💎 Trapiche Diamond (Slice Diamond) 1 Stone

Gem Gacha "April Birthstone" 💎 Trapiche Diamond (Slice Diamond) 1 Stone

Sold out Gem Gacha 3,980 yen💎1 diamond《Rose cut》(Fancy yellow, etc., 2.3mm-3.3mm)

Gem Gacha 3,980 yen💎1 diamond《Rose cut》(Fancy yellow, etc., 2.3mm-3.3mm)

Sold out Gem Gacha💎Special cut diamond (VS-SI class equivalent)

Gem Gacha💎Special cut diamond (VS-SI class equivalent)

Sold out 1 sawable diamond (average 0.13ct)

1 sawable diamond (average 0.13ct)

Sold out オパール 1石（オーバル、8×6mm） - KARATZ STORE｜カラッツSTORE

Opal 1 stone (oval, 8 x 6mm)《Multiple purchase discount available》

Sold out Diamond Gacha💎Diamond rough (including sawable and makeable diamonds, one in two people will receive an additional 1.6-1.7mm VS-SI class diamond) {Multiple purchase discount available}

Diamond Gacha💎Diamond rough (including sawable and makeable diamonds, one in two people will receive an additional 1.6-1.7mm VS-SI class diamond) {Multiple purchase discount available}

Sold out Pink Sapphire Gacha💎 (1 Padparadscha Sapphire 0.322ct with DGL Certificate) 1 Loose Stone {Multiple Purchase Discounts Available}

Pink Sapphire Gacha💎 (1 Padparadscha Sapphire 0.322ct with DGL Certificate) 1 Loose Stone {Multiple Purchase Discounts Available}
Sold out ライトミントグリーンダイヤモンド1石ルース（2.0mm,VS-SI）《複数購入割引有》

1 light mint green diamond loose (2.0mm, VS-SI)《Multiple purchase discount available》

Sold out 1 stone loose unheated silky pink sapphire from Vietnam《Discount available for multiple purchases》

1 stone loose unheated silky pink sapphire from Vietnam《Discount available for multiple purchases》
Sold out ウンバサファイア（タンザニア産）1石ルース《複数購入割引有》

Umba sapphire (from Tanzania) 1 stone loose《Discount available for multiple purchases》

Sold out タンザニア・ウィンザー産バイカラーサファイア1石ルース（オーバルカット）《複数購入割引有》

1 bicolor sapphire from Windsor, Tanzania, loose (oval cut)《Discount available for multiple purchases》

Sold out 《8石限定》ジェムガチャ『4月誕生石』💎ミントダイヤモンド1石💎（トリートメント）（VSクラス相当） - カラッツSTORE

《8 stones limited》Gem gacha 『April birthstone』💎1 mint diamond💎(treated)(VS class equivalent)

Sold out Gem Gacha💎 Ice Blue Diamond, Moss Green Diamond, London Blue Diamond, etc. (1.8-4.2mm, Treated)

Gem Gacha💎 Ice Blue Diamond, Moss Green Diamond, London Blue Diamond, etc. (1.8-4.2mm, Treated)

Sold out Gem Gacha💎1 special fluorescent diamond (VS-SI class equivalent, 2.0mm)

Gem Gacha💎1 special fluorescent diamond (VS-SI class equivalent, 2.0mm)

Sold out Black diamond 3.0mm loose (rose cut)《April birthstone》 1 stone

Black diamond 3.0mm loose (rose cut)《April birthstone》 1 stone

Sold out カラーチェンジサファイア 1石 - KARATZ STORE｜カラッツSTORE

Color change sapphire 1 stone

Sold out 《Only one left》1 Mexican opal loose stone (fire opal, water opal, small size)《Multiple purchase discounts available》《For beginners》

《Only one left》1 Mexican opal loose stone (fire opal, water opal, small size)《Multiple purchase discounts available》《For beginners》
Sold out Limited to 8 stones Tsavorite + Emerald Loose 2 stone set Multiple purchase discounts available Multiple purchase discounts available

Limited to 8 stones Tsavorite + Emerald Loose 2 stone set Multiple purchase discounts available Multiple purchase discounts available
Sold out モンタナサファイア1石ルース（約4×3mm,ペアシェイプ）《複数購入割引有》

[Limited to 26 stones] 1 loose Montana sapphire stone (approx. 4 x 3 mm, pear shape) [Discount available for multiple purchases]

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