New stock

【KEN氏】スペイン産スファレライト 1.320ctルース - カラッツSTORE

[On sale from 10pm on 5/11] Spanish Sphalerite 6.2mm/1.320ct loose stone Sale price¥19,800

Congo Andesine 18.643ct Loose Stone Japan-Germany Exchange Sale price¥69,800

[On sale from 10pm on 5/11] Madagascar bicolor sapphire 0.263ct loose stone (Padparadscha color) Sale price¥29,800

Afghanistan Bicolor Beryl 9.100ct Loose Stone Sale price¥34,800

Afghanistan Bicolor Beryl 9.490ct Loose Stone Sale price¥29,800

Black star sapphire 0.930ct loose Sale price¥6,980

Unheated Color Change Blue Sapphire 1.450ct Loose GIT Sale price¥158,000

Tanzania Pink Zoisite 0.242ct Loose Stone with Certificate of Authenticity Sale price¥79,800

Limited quantity: Mozambique grape garnet, 1 loose stone (4 x 6 mm, pear-shaped cut) Multiple purchase discounts available Sale price¥3,980

Limited to 7 stones! May birthstone special offer! Colombian emerald cat's eye, 1 loose stone (highly transparent cat's eye) Multiple purchase discounts available Sale price¥7,980

American Benitoite 3.5mm/0.192ct Loose Stone (Contains Minerals) Sale price¥69,800

Sri Lankan Star Sapphire 7.976ct Loose Sale price¥98,000

Brazilian alexandrite 0.082ct loose Sale price¥12,800

Brazilian Morganite 0.633ct loose stone Sale price¥9,800

Russian Demantoid Garnet 3.0mm/0.194ct Loose Stone Sale price¥18,800

Brazilian bicolor tourmaline cat's eye 2.640ct loose stone Sale price¥12,800

ブラジル産パライバトルマリン 0.225ct原石（ CuO:2.1%、MnO:0.9%）

Brazilian Paraiba tourmaline 0.225ct raw stone (CuO:2.1%, MnO:0.9%) Sale price¥8,800

Colombian emerald cat's eye 0.108ct loose Sale price¥8,800

South African diamond rough stone 0.210ct Sale price¥8,800

Madagascar Purple Sapphire 0.342ct Loose Stone Sale price¥12,800

[On sale from 10pm on 5/9] Cassiterite 1.022ct loose stone with certificate Sale price¥28,800

Cassiterite 1.676ct loose stone with certificate Sale price¥45,800

Cassiterite 1.477ct loose stone (bicolor) with certificate Sale price¥39,800

Colombian pyrite emerald 2.380ct rough stone Sale price¥29,800

Tanzania Bicolor Zoisite 2.110ct Loose Stone Sale price¥45,800

South African diamond rough (makeable) 0.284ct loose (VS-SI class equivalent) Sale price¥25,800

ロシア産デマントイドガーネットキャッツアイ（ホーステール認む） 0.147ctルース

[On sale from 10pm on 5/6] Russian Demantoid Garnet Cat's Eye (Horsetail Recognized) 2.7mm/0.147ct Loose Stone Sale price¥29,800

Australian Boulder Opal 6.160ct Loose Sale price¥18,800

Australian Boulder Opal 4.980ct Loose Sale price¥19,800

[On sale from 22:00 on 5/6] Indian Bloodshot Iolite Sunstone 3.740ct Loose Sale price¥25,800

Indian Bloodshot Iolite Sunstone 7.630ct Loose Sale price¥39,800

[On sale from 10pm on 5/6] K18YG Cambodian blue zircon 0.51ct diamond ring Sale price¥79,800

Limited to 4 stones: 1 Brazilian white topaz loose stone (average 2.1 carats) Multiple purchase discounts available Sale price¥2,980

Limited to 8 stones: 1 Mexican fire opal loose stone with unique color (up to 2.2ct) Multiple purchase discounts available Sale price¥3,980

Tanzanian bicolor sapphire 0.202ct loose stone Sale price¥18,800

Garden quartz 8.690ct loose Sale price¥2,980

K18PG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） 0.72ct・デマントイドガーネットリング

K18PG Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 0.72ct Demantoid Garnet Ring Sale price¥89,800

South African Diamond Rough (Sawable) 0.107ct Rough Trigon Sale price¥42,800

[On sale from 10pm on 5/5] Illusion pink tourmaline (iridescent tourmaline) 4.097ct loose stone Sale price¥55,800

[On sale from 22:00 on 5/5] Mozambique Illusion Paraiba Tourmaline 5.357ct loose stone (CuO: 0.2%, MnO: 4.6%) Sale price¥98,000

Pakistani Veirinite 0.173ct loose stone with certificate Sale price¥45,800

Pakistani Veirinite 0.157ct loose stone with certificate Sale price¥39,800

Zimbabwe bicolor euclase rough stone 0.367ct Sale price¥29,800

Euclase from Colombia 5.223ct Ruth Japanese German edition Sale price¥198,000

ミントグリーンダイヤモンド（トリートメント） 0.172ctルース（VSクラス相当,テーパードカット）

Mint green diamond (treatment) 0.172ct loose (VS class equivalent, tapered cut) Sale price¥29,800

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） 1.090ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 1.090ct loose stone Sale price¥9,800

Myanmar Star Enstatite 0.870ct Loose Stone Sale price¥14,800

Indian Star Garnet 11.440ct Loose Stone (6 Rows) Sale price¥5,980

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.