New stock

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

Color change Andesine 1 stone (3mm, round cut)《Discount available for multiple purchases》 Sale price¥2,980

Synthetic moissanite 6mm/0.748ct loose (star cut) Sale price¥19,800

[Available at 10 PM on August 11th] Limited to 9 stones: 1 loose Mexican opal stone [Multiple purchase discounts available] Sale price¥1,980

German Awinite 0.070ct loose stone Sale price¥15,800

Gem Gacha💎Chalcedony Gacha (1 in 5 will win a camellia cut)《Multiple purchase discounts available》 Sale price¥3,980

Myanmar Pink Spinel 0.650ct Loose Sale price¥16,800

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

Red spinel 0.195ct loose Sale price¥6,980

【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¥35,800

【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¥29,800

[Cat cut] Rubellite 7mm/1.540ct loose Sale price¥19,800

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

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

Gem Gacha💎 Cat Set (1 gemstone + 2 sapphires) {Multiple purchase discounts available} Sale price¥3,333

Benitoite 2.7mm/0.114ct loose Sale price¥27,800

Synthetic rutile 6.2mm/1.165ct loose stone Sale price¥19,800

Brazilian alexandrite 0.060ct loose Sale price¥14,800

Brazilian alexandrite 0.082ct loose Sale price¥18,800

{Only 3 left} Yuichiro Abe goods set [adult size T-shirt & coaster] Sale price¥2,980

1 blue fluorescent diamond (H&C, 3EX, VS-SI class equivalent, 2.0mm) {Multiple purchase discount available} Sale price¥8,980

Rose cut diamond 1.2mm x 1 stone (VS-SI class, DH color, melee diamonds) {Multiple purchase discounts available} Sale price¥2,980

Prehnite 3.870ct loose Sale price¥6,980

Playnight 3.085ct loose Sale price¥6,980

Prehnite 3.874ct loose Sale price¥6,980

Myanmar pink spinel 0.291ct loose stone Sale price¥6,980

[Panda cut] Rose quartz 5.081ct loose Sale price¥8,800

[Panda cut] White quartz (milky quartz) 4.477ct loose Sale price¥8,800

[Panda cut] Moonstone 5.476ct loose Sale price¥8,800

1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》 Sale price¥2,280

Colombian emerald loose rough stone set of 2 stones (round cut 3mm)《Multiple purchase discount available》 Sale price¥6,980

Tanzanite raw stone/loose 2 stone set (sugar loaf cut)《Multiple purchase discount available》 Sale price¥6,980

1 Ruby from Greenland (heart shape, 4mm)《Discount available for multiple purchases》 Sale price¥5,980

【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

【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/1.548ctルース - カラッツSTORE

YAG (Yttrium Aluminum Garnet) 6.5mm/1.548ct loose stone Sale price¥12,800

Tanzanian zircon 0.942ct loose stone Sale price¥8,800

Ruby 0.472ct loose Sale price¥6,980

Andesine 0.540ct loose stone Sale price¥4,980

【KEN氏】タンザニア産クリノゾイサイト 0.950ctルース（ファントムカット） - カラッツSTORE

Tanzanian Clinozoisite 0.950ct Loose Stone (Phantom Cut) Sale price¥5,980

【KEN氏】タンザニア産クリノゾイサイト 0.710ctルース（ファントムカット） - カラッツSTORE

Tanzanian Clinozoisite 0.710ct Loose Stone (Phantom Cut) Sale price¥5,980

【KEN氏】タンザニア産クリノゾイサイト 0.560ctルース（ファントムカット） - カラッツSTORE

Tanzanian Clinozoisite 0.560ct Loose Stone (Phantom Cut) Sale price¥5,980

Spinel from Sri Lanka 0.800ct loose Sale price¥9,800

【ダンデライオンカット】スモーキークォーツ 25mm/41.745ct《コラボ》ルース（6枚花びら）ワッペン付

[Dandelion Cut] Smoky Quartz 25mm/41.745ct《Collaboration》Loose (6 petals) with patch Sale price¥158,000

Brazilian Pink Imperial Topaz 1.907ct Loose Japanese-German Edition Sale price¥118,000

Russian demantoid garnet (horsetail recognized) 0.214ct loose Sale price¥59,800

ブラジル産パライバトルマリン 0.065ctルース（CuO:2.0%、MnO:2.6%）

Brazilian Paraiba tourmaline 0.065ct loose (CuO:2.0%, MnO:2.6%) Sale price¥25,800

Spinel from Sri Lanka 0.276ct loose Sale price¥4,980

Colombian mica in emerald 1.314ct loose Sale price¥39,800

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.