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2月誕生石

February birthstone

The birthstone for February is amethyst and cat's eye chrysoberyl .

Amethyst refers to purple quartz. There is also a gemstone called ametrine, which is a combination of amethyst and yellow citrine. It is often cut in special shapes such as plant or flower shapes, so it is fun to collect different cuts and can be enjoyed as everyday jewelry.

Chrysoberyl cat's eye is one of the varieties of chrysoberyl. When it is cabochon cut (dome-shaped cut) and light is shone on it from above, it has a cat's eye effect (chatoyancy), where a streak of light appears in the center. There are many other gemstones with the cat's eye effect, but this is the most representative and is sometimes simply called "cat's eye".


Carats Gem Magazine
" February birthstone and birthday stone list "

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Sold out カラーシフトアメジスト 2.126ctルース
Sold out カラーシフトアメジスト 1.283ctルース
Sold out K18 ルビー 0.75ct ガーネット,サファイア,アメジスト,エメラルド,トパーズ,ダイヤモンドペンダントトップ(ネックレストップ)鑑別書
Sold out [10/4, 10 PM Release] Brazilian Amethyst 8.984ct Loose Gemstone
Sold out [Available 9/22, 10 PM] 《Limited to 16 stones》 Amethyst Gacha featuring Shimizu Kikouseki’s Sakura and Dandelion cuts 《Multi-purchase discounts available》
Sold out カシャライアメジスト 0.531ctルース
Sold out 【Available Sept 4 at 10 PM】《13 Stones Only》Expert Artisan Gacha: 14mm Dandelion-Cut Ametrine (Reg. 59,800 JPY) & Koshu Precious Stone Kiriko Citrine (29,800 JPY)《Multi-purchase discounts available》
Sold out スリランカ産クリソベリルキャッツアイ 0.537ctルース
Sold out [8/ 10 PM Sale] Amethyst Gacha Featuring Dandelion Cut Gemstones by Shimizu Kisaki - 12 Limited Pieces Available! (Multiple Purchase Discount)
Sold out [On sale August 23rd at 10 PM] Limited 10 Stones! Amethyst Gacha featuring Koshu-Kiseki-Kiriko-plus-three "Akatsuki" (with one citrine cut by Mr. Sandje) [Multiple Purchase Discount Available]
Sold out パロットクリソベリルキャッツアイ 0.792ctルース
Sold out K18 アメトリン ペンダントトップ(ネックレストップ) 鑑別書
Sold out Bolivian Ametrine 36.887ct loose stone
Sold out ボリビア産アメトリン16.867ctルース
Sold out Brazilian Amethyst 9.749ct Loose Stone
Sold out Amethyst 9.860ct loose stone
Sold out Limited to 8 stones: 1 loose Brazilian ametrine (concave cut, average 10 carats) Multiple purchase discounts available
Sold out 《Limited to 11 Stones》Ametrine Sakura-cut Koshu-kiseki-kiriko plusthree Gacha (usually 29,800 yen) including flower cuts (with a bonus mini-trine stone)《Multiple purchase discount available》
Sold out K18/SILVER/Pd アメジスト ペンダントトップ(ネックレストップ)
Sold out ブラジル産カシャライアメジスト 0.387ctルース
Sold out スリランカ産クリソベリルキャッツアイ 0.507ctルース
Sold out スリランカ産クリソベリルキャッツアイ 0.419ctルース
Sold out ブラジル産ローズアメジスト 6.325ctルース
Sold out 《Limited to 9 Stones》Color Shift Amethyst Gacha, including a 3.49ct "Kompeito Cut" by Makoto Nakano, normally priced at ¥22,800, and a cut by Mr. Sanje.《Bulk Purchase Discount Available》
Sold out 《Limited to 10 Gems》Koshu Kiseki Kiriko plusthree "Akatsuki" Ametrine Gem Gacha《Bulk Purchase Discount Available》
Sold out Brazilian Pink Amethyst 2.545ct Loose Stone
Sold out 【12562113掲載】カラーシフトアメジスト 3.128ctルース
Sold out Brazilian Color Change Amethyst 1.998ct Loose
Sold out Brazilian color-shift amethyst 1.085ct loose
Sold out 【12559896掲載】ブラジル産エレスチャルアメジスト 3.678ctルース
Sold out ザンビア産アメジスト 39.112ct原石
Sold out ザンビア産アメジスト 29.357ct原石

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.