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February birthstone

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

Amethyst refers to purple quartz. There is also a gemstone called ametrine, which is a combination of amethyst and yellow citrine. They are often made with special cuts such as those in the shape of plants or flowers, so they are fun to collect due to their different cuts, and can also be enjoyed as everyday jewelry.

Chrysoberyl cat's eye is one of the varieties of chrysoberyl. When a cabochon cut (dome-shaped cut) is applied and light is shined from above, a streak of light appears in the middle, creating a cat's eye effect (chatoyancy). There are many other gemstones with a cat's eye effect, but this is the most typical and is sometimes simply referred to as "cat's eye."


Karatz GemMagazine
" List of February birthstones and birthstones "

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Ametrine 4.720ct loose Sale price¥3,980

Amethyst 4.961ct loose Sale price¥3,980

Amethyst 34.015ct loose Sale price¥14,800

Amethyst 30.78ct loose Sale price¥19,800

Sold out [On sale at 10pm on 11/10] {Limited to 3 stones} 1 Bolivian ametrine loose stone (average 7ct) {Multiple purchase discounts available}
Sold out カラーシフトアメジスト 4.499ルース
Sold out ピンクアメジスト 4.330ルース
Sold out アメジスト 14.821ルース
Sold out [On sale from 10pm on November 1st] [Limited to 2 stones] 1 loose Kasharai amethyst (4.5mm, round cut, February birthstone) [Multiple purchase discounts available]
Sold out [On sale from 10pm on November 1st] Kasharai Amethyst 1 stone loose (3.5mm, round cut, February birthstone) {Multiple purchase discounts available}
Sold out [On sale from 10pm on November 1st] [Limited to 2 stones] 1 loose Kasharai amethyst (3.0mm, round cut, February birthstone) [Multiple purchase discounts available]
Sold out Limited to 5 stones: 1 Veracruz amethyst rough stone (from Mexico, February birthstone) Multiple purchase discount
Sold out 【12546887更新】アメジスト 5.173ctルース
Sold out クリソベリルキャッツアイ 0.348ctルース
Sold out 【さくらインカット】カラーシフトアメジスト 14mm/7.450ct《コラボ》ルース ワッペン
Sold out Bolivian Ametrine 27.360ct loose stone
Sold out ボリビア産アメトリン 15.109ctルース
Sold out ボリビア産アメトリン 13.495ctルース
Sold out Bolivian Ametrine 3.865ct loose stone
Sold out Bolivian Ametrine 7.553ct loose stone
Sold out アメトリン 3.834ctルース
Sold out ボリビア産アメトリン 2.405ctルース
Sold out Pink amethyst 7.293ct loose stone
Sold out Dreamy 13-stone gemstone set (amethyst, pink sapphire, tanzanite, rhodolite garnet) and half eternity ring set (2.0mm)
Sold out クリソベリルキャッツアイ 1.164ctルース
Sold out Color shift amethyst 0.872ct loose stone
Sold out クリソベリルキャッツアイ 0.530ctルース
Sold out クリソベリルキャッツアイ 3.060ctルース
Sold out スリランカ産クリソベリルキャッツアイ 2.733ctルース
Sold out Color shift amethyst 0.780ct loose
Sold out Color shift amethyst 0.801ct 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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.