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10月誕生石

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 アフガニスタン産インディゴライトトルマリン 1.729ctルース
Sold out メキシコ産ファイアオパール 1.104ctルース
Sold out ケニア産クロムトルマリン 0.501ctルース
Sold out Green tourmaline 2.144ct loose
Sold out Australian black opal 0.232ct loose stone
Sold out 【12562555掲載】オーストラリア産ブラックオパール 0.248ctルース
Sold out 【12562533掲載】オーストラリア産ブラックオパール 0.427ctルース
Sold out 【12562530掲載】オーストラリア産ブラックオパール 0.784ctルース
Sold out オーストラリア産ブラックオパール 3.871ctルース
Sold out 【12562400掲載】メキシコ産オパール 0.265ctルース
Sold out 【12562398掲載】メキシコ産ファイアオパール 0.291ctルース
Sold out ウォーターメロントルマリン 3.403ctルース
Sold out オーストラリア産シェルオパール(貝オパール) 96.177ct原石
Sold out バイカラートルマリン 0.974ctルース
Sold out K18YG ベニトアイト 0.342ct リング
Sold out 【12561176掲載】メキシコ産オパール(ファセットカット) 0.644ctルース
Sold out 【12561168掲載】メキシコ産ウォーターオパール(ファセットカット) 0.349ctルース
Sold out 【12561913掲載】オーストラリア産ブラックオパール 0.221ctルース
Sold out Australian boulder opal 15.004ct loose stone
Sold out Mexican Fire Opal 0.281ct Loose
Sold out Bicolor tourmaline 3.242ct rough stone from Afghanistan
Sold out Mexican fire opal 0.235ct loose (facet cut)
Sold out Brazilian Indicolite Tourmaline 0.342ct Loose
Sold out Australian black opal 3.148ct loose
Sold out Australian black opal 0.435ct loose stone
Sold out 1.091ct loose Australian black opal
Sold out Brazilian bicolor tourmaline 1.016ct loose stone
Sold out Paraiba tourmaline from Brazil 0.066ct loose
Sold out K18/Pt950 Brazilian Paraiba tourmaline 0.071ct diamond ring (K18YG, CuO: 1.9%, MnO: 2.2%)
Sold out 18K Yellow Gold Brazilian Paraiba Tourmaline 0.048ct Diamond Pinky Ring (CuO: 1.7%, MnO: 2.2%)
Sold out Afghanistan Blue Tourmaline 4.0mm/0.268ct Loose Stone (Lagoon Tourmaline)
Sold out 0.361ct loose Brazilian Paraiba Tourmaline (CuO:1.0%, MnO:3.6%)
Sold out Brazilian Paraiba tourmaline 0.128ct loose stone (CuO: 1.7%, MnO: 3.4%)
Sold out オパール 0.595ctルース
Sold out Chrome tourmaline 0.300ct loose stone
Sold out オーストラリア産ボルダーオパール 1.730ctルース
Sold out Australian black opal 0.623ct loose stone
Sold out Australian Black Opal 0.825 ct Loose Stone
Sold out Australian white opal 1.928ct loose
Sold out 1.837ct loose Australian black opal
Sold out Australian boulder opal 2.326ct loose
Sold out Brazilian bicolor tourmaline 7.017ct loose stone
Sold out オーストラリア産ボルダーオパール 4.470ctルース
Sold out メキシコ産ファイアオパール 4.5mm/0.244ctルース
Sold out ブラジル産パライバトルマリン 0.420ct原石
Sold out モザンビーク産パライバトルマリン 0.229ctルース
Sold out アマゾン産グリーンオパール 1.120ctルース
Sold out オーストラリア産ボルダーオパール 4.729ct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.

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.