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October birthstone

October's birthstone is opal tourmaline .

Opal is known for its play-of-color effect, which shows an aurora-like glow of seven colors on its surface, but some types do not show this play-of-color effect. Not only are there many types, but each one has a different play of color, so I think it's perfect for those who like unique gemstones.

Tourmaline is a gemstone with so many color variations that it is said that there is no other color. Some are called by different names depending on their color, such as Paraiba tourmaline and rubellite . Some stones have multiple colors in one stone, and others look like watermelons, so I think it's fun to collect a variety of stones and enjoy the different colors.

Karatz GemMagazine
" List of October birthstones and birthstones "

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Sold out Hyalite Opal 0.820ct loose
Sold out Hyalite Opal 0.51ct loose
Sold out 【12523812掲載】バイカラートルマリン 0.521ctルース
Sold out 【12523819更新】ファイアオパール 1.802ctルース
Sold out 【12523823掲載】ファイアオパール 2.059ctルース
Sold out 【12523848掲載】バイカラートルマリン 0.247ctルース
Sold out 【12523851掲載】バイカラートルマリン 1.216ctルース
Sold out 【12523854掲載】ブラックオパール 0.500ctルース
Sold out 【11523884掲載】モザンビーク産パライバトルマリン 0.280ctルース
Sold out Bicolor tourmaline 1.395ct loose
Sold out Bicolor tourmaline 1.050ct loose
Sold out Bicolor tourmaline 0.970ct loose
Sold out 【12523928掲載】バイカラートルマリン 1.890ctルース
Sold out 【12523876掲載】ウォーターメロントルマリン 0.930ctルース
Sold out 【12524011掲載】バイカラートルマリン 1.553ctルース
Sold out 【12524010掲載】バイカラートルマリン 1.018ctルース
Sold out Tourmaline 0.771ct loose
Sold out 【さくらインカット】メキシコオパール 7mm ルース - カラッツSTORE
Sold out 【ダンデライオンカット】ウォーターオパール 6mm ルース - カラッツSTORE
Sold out Bicolor tourmaline 1.09ct loose
Sold out 【12524140掲載】バイカラートルマリン 0.760ctルース
Sold out Bicolor tourmaline 0.90ct loose
Sold out Bicolor tourmaline 1.07ct loose
Sold out Bicolor tourmaline 0.590ct loose
Sold out Bicolor tourmaline 0.50ct loose
Sold out Bicolor tourmaline 0.840ct loose
Sold out Bicolor tourmaline 0.99ct loose
Sold out Bicolor tourmaline 1.00ct loose
Sold out Pink tourmaline 0.61ct loose
Sold out Bicolor tourmaline 0.480ct loose
Sold out Pt950ピンクサファイア0.23ct・パライバトルマリン リング - カラッツSTORE
Sold out 【さくらインカット】ウォーターオパール 6mm ルース - カラッツSTORE
Sold out 【12524516掲載】北海道産UVオパール 23.980ctルース
Sold out Unheated Brazilian Bicolor Paraiba Tourmaline 0.09ct loose with GIA
Sold out ピンクトルマリン 1.02ctルース
Sold out Cantera Opal 3.750ct Loose (Egged in)
Sold out 【12524346掲載】カンテラオパール 6.030ctルース
Sold out Pink tourmaline 0.780ct loose
Sold out グリーントルマリン 0.17ctルース
Sold out 【12524873掲載】オパール 1.05ctルース
Sold out 【12524875掲載】オパール 2.78ctルース
Sold out 【12524874掲載】オパール 2.20ctルース
Sold out カンテラオパール 7.57ctルース
Sold out Pt900ブラジル産パライバトルマリン0.08ct リング - カラッツSTORE
Sold out 【11524994掲載】モザンビーク産パライバトルマリン 0.51ctルース
Sold out Colorless tourmaline (acroite) 0.34ct loose
Sold out トルマリン 0.15ctルース
Sold out 【12525136掲載】バイカラートルマリン 0.24ctルース

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.