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Gemstones that exhibit a cat's eye effect

When exposed to light, a cat's eye gemstone reveals a single ray of light in the middle, just like a cat's eye. This phenomenon is called chatoyancy or cat's eye effect, and is said to be caused by the inclusion of tube-shaped inclusions inside. It is often cut into a dome-shaped cabochon to make the cat's eye effect more visible.

Karatz GemMagazine
" Cat's Eye Jewel "

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ブラジル産アレキサンドライトキャッツアイ 0.219ctルース

Brazilian Alexandrite Cat's Eye 3.3mm/0.219ct Loose Stone (Hemachita Mine) Sale price¥32,800
スリランカ産クリソベリルキャッツアイ 0.519ctルース

Sri Lankan Chrysoberyl Cat's Eye 0.519ct Loose Stone Sale price¥8,800
ブラジル産バイカラートルマリンキャッツアイ 22.056ctルース

Brazilian bicolor tourmaline cat's eye 22.056ct loose stone Sale price¥198,000
Pt900/K18ブラックオパールキャッツアイ0.736 ペンダント（ネックレス）

Pt900/K18 Australian Black Opal Cat's Eye 0.736ct Diamond Pendant (Necklace) Chuho Sale price¥258,000
ルベライトキャッツアイ 1.180ctルース

Brazilian Rubellite Cat's Eye 1.180ct Loose Stone Sale price¥29,800
タンザニア産コーネルピンキャッツアイ 0.622ctルース

Tanzanian Kornerupine Cat's Eye 0.622ct Loose Stone Sale price¥4,980
スリランカ産クリソベリルキャッツアイ 1.514ctルース

Sri Lankan Chrysoberyl Cat's Eye 1.514ct Loose Stone Sale price¥6,980
スリランカ産クリソベリルキャッツアイ 1.074ctルース

Sri Lankan Chrysoberyl Cat's Eye 1.074ct Loose Stone Sale price¥5,980
タンザニア産コーネルピンキャッツアイ 1.608ctルース

Tanzanian Kornerupine Cat's Eye 1.608ct Loose Stone Sale price¥6,980
コーネルピンキャッツアイ 0.866ctルース

Tanzanian Kornerupine Cat's Eye 0.866ct Loose Stone Sale price¥5,980
タンザニア産コーネルピンキャッツアイ 1.539ctルース

Tanzanian Kornerupine Cat's Eye 1.539ct Loose Stone Sale price¥9,800
クリソベリルキャッツアイ 2.843ctルース

Chrysoberyl cat's eye 2.843ct loose Sale price¥39,800
スリランカ産クリソベリルキャッツアイ 5.176ctルース

Chrysoberyl cat's eye from Sri Lanka 5.176ct loose Sale price¥198,000
コーネルピンキャッツアイ 0.513ctルース

Cornel pin cat's eye 0.513ct loose Sale price¥6,980
コーネルピンキャッツアイ 0.872ctルース

Cornel pin cat's eye 0.872ct loose 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
Sold out クリソベリルキャッツアイ 1石（2月新誕生石）

Chrysoberyl Cat's Eye 1 stone (February new birthstone)

Sold out Emerald Gacha (including Emerald Cat's Eye and special cuts) featuring Russian non-oil emeralds, etc. 💎 (Multiple purchase discount available)

Emerald Gacha (including Emerald Cat's Eye and special cuts) featuring Russian non-oil emeralds, etc. 💎 (Multiple purchase discount available)
Sold out Russian alexandrite normally 69,800 JPY, rare twin chrysoberyl cat's eye normally 65,800 JPY, Alex Gacha (multiple purchase discount available)

Russian alexandrite normally 69,800 JPY, rare twin chrysoberyl cat's eye normally 65,800 JPY, Alex Gacha (multiple purchase discount available)
Sold out 《Limited to 20 Stones》Emerald Gacha: Win a 2.2ct Columbia Emerald Koshu-Kiseki Cut (normally 79,800 yen) or an Emerald Cat's Eye! 《Multiple Purchase Discount Available》

《Limited to 20 Stones》Emerald Gacha: Win a 2.2ct Columbia Emerald Koshu-Kiseki Cut (normally 79,800 yen) or an Emerald Cat's Eye! 《Multiple Purchase Discount Available》
Sold out コロンビア産エメラルドキャッツアイ1石ルース（平均0.35ct)《初めての方向け》

Colombian emerald cat's eye 1 stone loose (average 0.35ct)《For first-time users》《Multiple purchase discount available》

Sold out 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

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
Sold out 【12525545掲載】アルマンディンガーネットキャッツアイ 1.820ctルース

Almandine garnet cat's eye 1.820ct loose

Sold out 【12562785掲載】コロンビア産エメラルドキャッツアイ 0.574ctルース

【On sale May 2nd, 10 PM JST】Colombian Emerald Cat's Eye 0.574ct Loose Stone
Sold out Indian Alexandrite Cat's Eye 1.03ct Loose GIA

Indian Alexandrite Cat's Eye 1.03ct Loose GIA

Sold out Brazilian Alexandrite Cat's Eye 2.6mm/0.111ct Loose Stone

Brazilian Alexandrite Cat's Eye 2.6mm/0.111ct Loose Stone
Sold out Brazilian Alexandrite Cat's Eye 0.097ct Loose Stone

Brazilian Alexandrite Cat's Eye 0.097ct Loose Stone
Sold out Indian alexandrite cat's eye 0.679ct loose

Indian alexandrite cat's eye 0.679ct loose
Sold out Indian alexandrite cat's eye 0.422ct loose

Indian alexandrite cat's eye 0.422ct loose
Sold out 【12560374掲載】ブルートパーズキャッツアイ 22.761ctルース

Brazilian Blue Topaz Cat's Eye 15mm/22.761ct Loose Stone
Sold out Indian Parrot Chrysoberyl Cat's Eye 5.0mm/1.099ct Loose Stone

Indian Parrot Chrysoberyl Cat's Eye 5.0mm/1.099ct Loose Stone

Sold out Indian Parrot Chrysoberyl Cat's Eye 5.6mm/1.715ct Loose Stone

Indian Parrot Chrysoberyl Cat's Eye 5.6mm/1.715ct Loose Stone

Sold out 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） 0.171ctルース

Russian demantoid garnet cat's eye (horsetail recognized) 0.171ct loose

Sold out 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） 0.222ctルース

Russian demantoid garnet cat's eye (horsetail recognized) 0.222ct loose

Sold out アクアマリンキャッツアイ 3.528ctルース

Aquamarine cat's eye 3.528ct loose
Sold out クリソベリルキャッツアイ 2.283ctルース

Chrysoberyl cat's eye 2.283ct loose
Sold out 0.559ct Sri Lankan Chrysoberyl Cat's Eye Loose Stone

0.559ct Sri Lankan Chrysoberyl Cat's Eye Loose Stone
Sold out アベンチュリンアクアマリンキャッツアイ 1.567ctルース

Aventurine Aquamarine Cat's Eye 1.567ct Loose

Sold out クリソベリルキャッツアイ 1.080ctルース

Chrysoberyl cat's eye 1.080ct loose

Sold out ブルートパーズキャッツアイ 2.958ctルース

Brazilian Blue Topaz Cat's Eye 2.958ct Loose Stone
Sold out クンツァイトキャッツアイ 25.941ctルース

Kunzite Cat's Eye 25.941ct Loose
Sold out 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） 3mm/0.146ctルース

Russian demantoid garnet cat's eye (horsetail recognized) 3mm/0.146ct loose
Sold out トルマリンキャッツアイ 4.370ctルース

Tourmaline cat's eye 4.370ct loose
Sold out コロンビア産エメラルドキャッツアイ 0.093ctルース

Colombian emerald cat's eye 0.093ct loose
Sold out ピンクトルマリンキャッツアイ 5.460ctルース

Pink tourmaline cat's eye 5.460ct loose
Sold out コーネルピンキャッツアイ 0.422ctルース

Cornel pin cat's eye 0.422ct loose

Sold out インドネシア産パラサイティックペリドット・キャッツアイ 0.489ctルース

Indonesian Parasitic Peridot Cat's Eye 0.489ct Loose Stone
Sold out コロンビア産エメラルドキャッツアイ 0.084ctルース

Colombian emerald cat's eye 0.084ct loose

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.