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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ブラジル産パライバトルマリン 0.042ctルース（CuO:2.5%、MnO:2.4%）

Brazilian Paraiba tourmaline 0.042ct loose (CuO:2.5%, MnO:2.4%)

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ブラジル産パライバトルマリン 0.051ctルース（CuO:2.0%、MnO:2.0%）

Paraiba tourmaline from Brazil 0.051ct loose (CuO:2.0%, MnO:2.0%)

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ブラジル産パライバトルマリン 0.030ctルース（CuO:2.7%、MnO:2.8%）

Brazilian Paraiba tourmaline 0.030ct loose (CuO:2.7%, MnO:2.8%)

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【さくらインカット】ウォーターオパール 7mmルースワッペン付 - カラッツSTORE

[Sakura Incut] Water Opal 7mm Loose with Patch

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[Kikyo Cut] Opal 3.180ct Loose《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

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ブラジル産パライバトルマリン 0.173ctルース（CuO:2.1%、Mn:2.1%）

Paraiba tourmaline from Brazil 0.173ct loose (CuO:2.1%, Mn:2.1%)

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[Koshu Precious Stone Kiriko] Green Tourmaline 3.88ct Loose with Patch

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【カラフリ】Pt900ブラジル産パライバトルマリン0.16ctピアス中宝鑑 - カラッツSTORE

[Colorful] Pt900 Brazilian Paraiba Tourmaline 0.16ct earrings Medium treasure

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[Mr. Sanjay] Mexican fire opal 1.240ct loose

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Fire opal 3.380ct loose

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UV opal from Hokkaido 13.540ct loose with patch

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UV opal from Hokkaido 13.900ct loose with patch

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Particolor tourmaline 6.032ct loose (tricolor tourmaline)

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[KEN] Opal 1.570ct loose

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Indigolite tourmaline 1.425ct loose Japanese and German

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[Mr. Sanjay] Pink tourmaline 0.397ct loose

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[Mr. Sanjay] Bicolor tourmaline 0.657ct loose

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[Mr. Sanjay] Green tourmaline 0.782ct loose

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Mexican fire opal 3.039ct loose

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Mexican cantera opal 5.273ct loose

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Mexican cantera opal 9.782ct loose

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[Mr. Sanjay] Bicolor tourmaline 0.294ct loose

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[Mr. Sanjay] Mexican water opal 0.602ct loose contrals opal)

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Paraiba tourmaline from Brazil 0.181ct loose

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Indigolite tourmaline 0.701ct loose

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【カラフリ】K18ブラジル産パライバトルマリンインクォーツ1.5 ペンダントトップ（ネックレストップ）

[Colorful] K18 Brazilian Paraiba tourmaline in quartz 1.5ct pendant top (necklace top)

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Paraiba tourmaline from Brazil 0.351ct loose

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Australian black opal 1.134ct loose

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Australian black opal 1.273ct loose

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Paraiba tourmaline from Mozambique 0.275ct loose

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K18 Cornell Pin (Prismatine) 0.233ct Paraiba Tourmaline Tanzanite Ring

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[Posted 12548385] Opal from Indonesia 0.393ct loose

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Paraiba tourmaline from Brazil 0.033ct loose (CuO:2.7%, MnO:2.6%)

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Paraiba tourmaline from Brazil 0.024ct loose (CuO:2.4%, MnO:1.4%)

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Brazilian Paraiba tourmaline 0.032ct loose (CuO:2.7%, MnO:1.9%)

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Paraiba tourmaline from Brazil 0.041ct loose (CuO:2.7%, MnO:2.6%)

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Paraiba tourmaline from Brazil 0.039ct loose (CuO:1.9%, MnO:1.4%)

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Paraiba tourmaline from Brazil 0.036ct loose (CuO:1.4%, MnO:1.1%)

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Indigolite tourmaline 1.177ct loose Japanese and German

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Bicolor tourmaline 6.495ct raw stone from Nigeria

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Mexican Hyalite Opal 2.822ct Loose (Faceted Cut)

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[Colorful] K18 Imperial Topaz 1.00ct/Brazilian Paraiba Tourmaline Pendant Top (Necklace Top)

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1 Yellow Opal (October birthstone, faceted cut) {Multiple purchase discount}

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ブラジル産パライバトルマリン 0.447ctルース（CuO:1.0%、MnO:3.6%）

Brazilian Paraiba tourmaline 0.447ct loose (CuO:1.0%, MnO:3.6%)

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Bicolor tourmaline 3.641ct rough stone from Afghanistan

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[Sakura Incut] Mexican water opal 6mm/0.493ct loose with patch Japanese and German

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Mexican Opal 0.167ct Loose (Faceted Cut)

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Watermelon tourmaline 2.314ct 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.

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