Birthstone list

[On Sale at 10pm on 10/7] 1.728ct Loose Aquamarine from Vietnam Sale price¥18,800

ダイヤモンド（H&C） 3.8mm/0.208ctルース(G, IF, 3Excellent H&C)

[On Sale at 10 PM on September 28th] 3.8mm/0.208ct Internally Flawless Diamond (H&C) Loose Stone (G, IF, 3 Excellent H&C) Sale price¥69,800

イエローダイヤモンド 0.165ctルース(FANCY VIVID ORANGY YELLOW, SI-2)

[On Sale at 10 PM on September 28th] Yellow Diamond 3.4mm/0.165ct Loose (Fancy Vivid Orangy Yellow, SI-2) Sale price¥29,800

[On Sale at 10 PM on September 23rd] Tanzanian Dragon Garnet 0.710ct Loose Stone Sale price¥19,800

Australian boulder opal 1.868ct loose Sale price¥18,800

Australian boulder opal 1.675ct loose Sale price¥14,800

Australian boulder opal 28.880ct loose Sale price¥59,800

スリランカ産ホワイトサファイア 2.9mm/0.086ctルース（ローズカット）

Sri Lankan white sapphire 2.9mm/0.086ct loose (rose cut) Sale price¥3,980

Brazilian imperial topaz 0.467ct loose Sale price¥15,800

Color change garnet from Madagascar 0.855ct loose Sale price¥9,800

Color change garnet from Madagascar 0.648ct loose Sale price¥8,800

Brazilian pink imperial topaz 0.322ct loose Sale price¥12,800

American Anthill Garnet (Chrome Pyrope Garnet) 5mm/0.540ct Loose Sale price¥22,800

ブラジル産パライバトルマリン 0.275ctルース（CuO:1.5％.MnO:2.3％）

Brazilian Paraiba tourmaline 0.275ct loose (CuO:1.5%.MnO:2.3%) Sale price¥358,000

Colombian emerald cat's eye 0.190ct loose Sale price¥15,800

【カメリアカット】カナダ産ラブラドライト（通称名：ブルームーンストーン） 14mm/9.947ct《コラボ》ルース - カラッツSTORE

[Camellia cut] Labradorite from Canada (common name: Blue Moonstone) 14mm/9.947ct《Collaboration》 Loose Sale price¥29,800

【カメリアカット】カナダ産ラブラドライト（通称名：ブルームーンストーン） 12mm/5.594ct《コラボ》ルースワッペン付 - カラッツSTORE

[Camellia cut] Labradorite from Canada (common name: Blue Moonstone) 12mm/5.594ct《Collaboration》 Loose with emblem Sale price¥25,800

[Koshu Precious Stone Kiriko]《Moon-shaped Kiriko》Citrine 6.097ct《Collaboration》With loose patch Sale price¥69,800

Paraiba tourmaline from Brazil 0.154ct loose (CuO:1.1wt%, MnO:1.4wt%) Sale price¥128,000

ピンクダイヤモンド 0.051ctルース(FANCY LIGHT PINK, SI-2)

[Posted 32501454] Pink Diamond 0.051ct Loose (FANCY LIGHT PINK, SI-2) Sale price¥39,800

Russian demantoid garnet (horsetail recognized) 0.291ct loose Sale price¥49,800

Royal blue sapphire 1.44ct loose GIA Sale price¥188,000

アンデシン・ラブラドライト（通称名レインボームーンストーン） 6mm/0.669ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 6mm/0.669ct Loose Stone Sale price¥9,800

[Camellia cut] Mexican fire opal 1.270ct loose with patch Sale price¥98,000

Brazilian particolor Paraiba tourmaline 0.26ct loose GIA Sale price¥598,000

Unheated Paraiba tourmaline from Brazil 0.050ct loose GIA (color change Paraiba tourmaline) Sale price¥148,000

YAG（イットリウムアルミニウムガーネット） 1.792ctルース - カラッツSTORE

YAG (yttrium aluminum garnet) 1.792ct loose Sale price¥12,800

【サンジェ氏】YAG（イットリウムアルミニウムガーネット） 6.5mm/1.774ctルース - カラッツSTORE

YAG (Yttrium Aluminum Garnet) 6.5mm/1.774ct loose stone Sale price¥12,800

ブラジル産パライバトルマリン 0.226ctルース（CuO:0.7%、MnO:2.5%）

Brazilian Paraiba tourmaline 0.226ct loose (CuO:0.7%, MnO:2.5%) Sale price¥39,800

Bicolor pink star sapphire from Mogok 0.360ct loose Sale price¥24,800

Pt950ベニトアイト0.10ct・アクアマリン・ブルーダイヤモンドリング - カラッツSTORE

Pt950 Benitoite 0.10ct Aquamarine Blue Diamond Ring Sale price¥89,800

Bicolor tourmaline 0.591ct loose (rose cut) Sale price¥8,980

Bicolor tourmaline 0.435ct loose (rose cut) Sale price¥5,980

Pink tourmaline 0.482ct loose stone Sale price¥5,980

[On Sale at 10 PM on September 22nd] Brazilian Bicolor Tourmaline 0.258ct Loose Stone Sale price¥8,800

[12549429] Blue sapphire 0.862ct loose stone Sale price¥25,800

[On Sale at 10 PM on September 22nd] Unheated Brazilian Paraiba Tourmaline 0.039ct Loose Stone (CuO: 2.0%, MnO: 2.3%) Sale price¥59,800

Unheated Brazilian Paraiba tourmaline 0.082ct loose stone (CuO: 1.6%, MnO: 2.3%) Sale price¥79,800

[On Sale at 10 PM on September 22nd] Colombian Trapiche Emerald 1.448ct Loose Sale price¥69,800

[On Sale at 10 PM on September 21st] South African Rough Diamond (Sawable) 0.105ct Rough Stone (with Trigon) Sale price¥39,800

マリ共和国産マリガーネット（グロッシュラー/アンドラダイト・ガーネット） 0.393ctルース

[Available at 10 PM on September 22nd] Mali Garnet (Grossular/Andradite Garnet) 4.2mm/0.393ct Loose Stone from the Republic of Mali with Certificate of Authenticity Sale price¥9,800

[On sale at 10 PM on September 21st] Limited to 14 stones: Beryllium-heated Sapphire (3.5mm, KEN Cut) - Single Loose Stone [Multiple purchase discounts available] Sale price¥1,580

《再入荷》【宝石商の道具】ゲルタックケース3個セット《透明・黒背景の2種類有》（ブルーサファイア3石付） - カラッツSTORE

[Jeweler's Tools] Set of 3 gel tack cases (2 types: transparent and black background) (includes 3 blue sapphires) (discount available for multiple purchases) Sale price¥3,980

H&C（ハート&キューピッド）専用スコープ（ダイヤモンド専用スコープ) - カラッツSTORE

[Jeweler's Tools] H&C (Heart & Cupid) Special Scope (Diamond Special Scope) Sale price¥1,580

[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery Sale price¥6,980

[Jeweler's Tools] Digital Caliper Color Shift Amethyst 2 Piece Set Sale price¥2,980

"PSYCHO-PASS" x KARATZ collaboration jewelry: Shogo Makishima razor design ring (amethyst) Sale priceFrom ¥25,800

"PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device-Inspired Ring with Inspector Design [Ginoza Nobuchika Model] "London Blue Topaz" Sale priceFrom ¥25,800

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's Initiatives and Social Contributions

We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.

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.