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奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 5.240ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 5.240ct loose Sale price¥6,980
奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 6.180ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 6.180ct loose Sale price¥6,980
【KEN氏】ジルコン 0.426ctルース - カラッツSTORE

Zircon 0.426ct loose stone Sale price¥5,980
Pink spinel 0.290ct loose

Pink spinel 0.290ct loose Sale price¥7,980
パープルスピネル 0.210ctルース

Purple spinel 0.210ct loose Sale price¥6,980
ラベンダースピネル 0.160ctルース

Lavender spinel 0.160ct loose Sale price¥5,980
UVタイプミントガーネット 0.360ctルース - カラッツSTORE

UV type mint garnet 0.360ct loose Sale price¥5,980
UVタイプミントガーネット 0.480ctルース - カラッツSTORE

UV type mint garnet 0.480ct loose Sale price¥6,980
モンテブラサイト 0.370ctルース（ミントグリーン）

Montebrasite 0.370ct loose (mint green) Sale price¥5,980
Montebrasite 0.370ct loose (light green)

Montebrasite 0.370ct loose (light green) Sale price¥5,980
【12533740掲載】コーネルピン 0.890ct原石

Cornerpine 0.890ct rough stone Sale price¥5,980
【KEN氏】ファイアオパール2石ペア 4mm/0.336ctルース - カラッツSTORE

Fire Opal 2 Stone Pair 4mm/0.336ct Loose Sale price¥6,980
ジルコン 1.020ctルース

Zircon 1.020ct loose Sale price¥5,980
ピンクオパール 7.180ctルース

Pink opal 7.180ct loose Sale price¥8,800
【12530720掲載】ラリマー 4.080ctルース

Larimar 4.080ct loose Sale price¥9,800
【12530558掲載】アンダリュサイト 0.480ctルース

Andalusite 5mm/0.480ct loose Sale price¥5,980
カンテラオパール 6.126ctルース

Cantera opal 6.126ct loose Sale price¥8,800
モンテブラサイト 0.370ctルース（グリーン）

Montebrasite 0.370ct loose (green) Sale price¥5,980
モンテブラサイト4.1mm 2石ペア ルース（グリーン）

Montebrasite 4.1mm 2 stone pair loose (green) Sale price¥9,800
ファイアオパール2石セット 1.440ctルース

Fire opal 2 stone set 1.440ct loose Sale price¥8,800
シーブルーカルセドニー 6.964ctルース

Sea blue chalcedony 6.964ct loose Sale price¥7,980
【KEN氏】ファイアオパール 1.381ctルース - カラッツSTORE

Fire opal 1.381ct loose stone Sale price¥6,980
【KEN氏】オーソクレース 2.940ctルース - カラッツSTORE

Orthoclase 2.940ct loose stone Sale price¥7,980
イエロートルマリン 0.280ctルース

Yellow tourmaline 0.280ct loose Sale price¥5,980
タンザナイト 4.940ct原石

Tanzanite 4.940ct rough stone Sale price¥6,980
スキャポライトキャッツアイ 8.880ctルース

Scapolite Cat's Eye 8.880ct Loose Sale price¥8,800

Additional fee: 7,500 yen Sale price¥7,500

Additional charge for resizing: 9,750 yen Sale price¥9,750

Additional charge for resizing: 6,750 yen Sale price¥6,750

Additional charge for resizing: 8,250 yen Sale price¥8,250

Additional charge for resizing: 9,000 yen Sale price¥9,000
Sold out [Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones

[Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones

Sold out 「起源がわかる 宝石大全」初版＆宝石小瓶 2点セット

“An Encyclopedia of Gems that Understand the Origin” & Sapphire 2 Stone Set《Purchased in Chanthaburi, Thailand》

Sold out [Jeweler's Tools] Collection set of 24 loose cases, 3 loose cases [cut by Mr. KEN, worth 8,000 yen]

[Jeweler's Tools] Collection set of 24 loose cases, 3 loose cases [cut by Mr. KEN, worth 8,000 yen]

Sold out 【再入荷】鉱物標本スタンドとサンストーンorアイオライトの2点セット - KARATZ STORE｜カラッツSTORE

[Restocked] 2-piece set of mineral specimen stand and sunstone or iolite

Sold out Diamond 2mm (VS class, DG color, round cut, melee diamond 2.0mm) 1 loose stone {Multiple purchase discounts available}

Diamond 2mm (VS class, DG color, round cut, melee diamond 2.0mm) 1 loose stone {Multiple purchase discounts 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 Red spinel rough stone 1 stone (raspberry color)《Discount available for multiple purchases》

Red spinel rough stone 1 stone (raspberry color)《Discount available for multiple purchases》

Sold out Cobalt Garnite 1 stone (discount available for multiple purchases)

Cobalt Garnite 1 stone (discount available for multiple purchases)

Sold out 【猫カット】アメジスト（8mm） - カラッツSTORE

[Cat cut] Amethyst (8mm)

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 ブルーベリル（マシシベリル）＆ミントグリーンベリル2石セット

[Resale] Blue Beryl (Mashishi Beryl) & Mint Green Beryl 2 stone set《Multiple purchase discount available》

Sold out 1 dragon garnet stone (4.5mm, round cut)

1 dragon garnet stone (4.5mm, round cut)

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 Gem gacha cut by Shimizu Kiseki and Yoichi Fukazawa 💎 {Multiple purchase discounts available} {Halloween specials included}

Gem gacha cut by Shimizu Kiseki and Yoichi Fukazawa 💎 {Multiple purchase discounts available} {Halloween specials included}

Sold out Includes phosphophyllite, red beryl 0.1ctup, pink diamond (FANCY LIGHT PURPLISH PINK), etc. Gem gacha 1 stone {Multiple purchase discount available}

Includes phosphophyllite, red beryl 0.1ctup, pink diamond (FANCY LIGHT PURPLISH PINK), etc. Gem gacha 1 stone {Multiple purchase discount available}
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 Limited to 25 stones: Brazilian Paraiba Tourmaline (including bicolor, Batalha) rough stones, average size 0.1ct. Discounts for multiple purchases available.

Limited to 25 stones: Brazilian Paraiba Tourmaline (including bicolor, Batalha) rough stones, average size 0.1ct. Discounts for multiple purchases 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.

KARATZ・Five Commitments

So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.

KARATZの取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

KARATZ Books

These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.

jeweler's tools

For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.