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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 【サンジェ氏】カスタムカットのトルマリン1石（アクロアイト・ルベライト・ピンクトルマリン）《複数購入割引》 - カラッツSTORE

[Mr. Sanjay] Custom-cut tourmaline 1 stone (acroite, rubellite, pink tourmaline)《Multiple purchase discount》

Sold out Gem Gacha 💎 Bicolor Sapphire 💎

Gem Gacha 💎 Bicolor Sapphire 💎

Sold out [Limited time sale] Brazilian Santa Maria aquamarine 1 stone loose [Multiple purchase discount available]

[Limited time sale] Brazilian Santa Maria aquamarine 1 stone loose [Multiple purchase discount available]
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 1 stone loose tourmaline from Tanzania (3mm, octagonal cut)《Discount available for multiple purchases》

1 stone loose tourmaline from Tanzania (3mm, octagonal cut)《Discount available for multiple purchases》
Sold out Brazilian Paraiba tourmaline (Batalha) 1 stone 1.3-1.4mm

Brazilian Paraiba tourmaline (Batalha) 1 stone 1.3-1.4mm

Sold out ロシア産デマントイドガーネット原石 1石《バンコク買付品》

1 Russian demantoid garnet rough stone (discount available for multiple purchases)

Sold out Rhodolite garnet (octagonal cut) 1ct 1 stone

Rhodolite garnet (octagonal cut) 1ct 1 stone

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 Tanzania Dragon Garnet 1 Stone Loose {Multiple purchase discount available}

Tanzania Dragon Garnet 1 Stone Loose {Multiple purchase discount 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 スカイブルートパーズ（内部にスター,6mm）1石ルース

Sky blue topaz (6mm, star inside) 1 stone loose (discount available for multiple purchases)
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 Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture, 1 stone loose (discount available for multiple purchases)

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture, 1 stone loose (discount available for multiple purchases)
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 アメトリン1石ルース《複数購入割引有》

Ametrine 1 stone loose《Multiple purchase discount available》

Sold out インペリアルトパーズ 1石 - KARATZ STORE｜カラッツSTORE

Imperial topaz 1 stone

Sold out マルチカラートルマリン 1石（オクタゴナルカット,八角形,4mm） - KARATZ STORE｜カラッツSTORE

1 multi-colored tourmaline (octagonal cut, octagonal, 4mm)

Sold out ロードライトガーネット 1点（6×6mm） - KARATZ STORE｜カラッツSTORE

Rhodolite garnet 1 piece (6×6mm)

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 Amethyst 1 stone loose (trilliant x concave cut, 10mm)《Multiple purchase discount available》

Amethyst 1 stone loose (trilliant x concave cut, 10mm)《Multiple purchase discount available》

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 グレープガーネット10mm 1石

Grape Garnet 10mm 1 stone loose《Discount available for multiple purchases》

Sold out 【猫カット】シトリン（8mm） - カラッツSTORE

[Cat cut] Citrine (8mm)

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 Limited to 8 stones: 1 loose spessartine garnet from Tanzania. Discounts available for multiple purchases.

Limited to 8 stones: 1 loose spessartine garnet from Tanzania. Discounts available for multiple purchases.
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 《Limited to 9 stones》 1 stone tourmaline from Brazil《Discount available for multiple purchases》

《Limited to 9 stones》 1 stone tourmaline from Brazil《Discount available for multiple purchases》
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 モザンビーク産ロードライトガーネット1石ルース（変形のハートシェイプカット,4.5mm）《複数購入割引有》

1 stone loose rhodolite garnet from Mozambique (deformed heart-shaped cut, 4.5mm)《Discount available for multiple purchases》
Sold out [Limited to 7 sets] October birthstone tourmaline 3 stone set (1 rough stone from Afghanistan, 2 loose 2.5mm stones)

[Limited to 7 sets] October birthstone tourmaline 3 stone set (1 rough stone from Afghanistan, 2 loose 2.5mm stones)

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 Dragon Garnet 1 stone (1.8mm, round cut)《Discount available for multiple purchases》

Dragon Garnet 1 stone (1.8mm, round cut)《Discount available for multiple purchases》

Sold out Russian demantoid garnet (2mm, round cut) 1 stone (discount available for multiple purchases)

Russian demantoid garnet (2mm, round cut) 1 stone (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)

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