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 "
Particolor tourmaline 24.147ct loose
Sale price¥59,800
Fire opal 1.381ct loose stone
Sale price¥6,980
Fire opal 0.937ct loose stone
Sale price¥4,980
Yellow tourmaline 0.280ct loose
Sale price¥5,980
[Colorful] Pt900 Boulder Opal 15.82ct Pendant Top (Necklace Top)
Sale price¥69,800
![[Jeweler's Tools] {3 sets remaining} 3-piece set: Jewelry loupe (14x magnification), blue diamond, and pink tourmaline or sapphire](http://store.karatz.jp/cdn/shop/files/collage_decd18ef-172e-4f8c-8e19-ca40351ff10c.png?v=1743665373&width=4000)
![[Available at 10 PM on August 17th] Limited Edition 12 Stones Rare Stone Gacha💎 Benitoite, Zimbabwean Euclase, Brazilian Alexandrite, and Paraiba Tourmaline (Loose Stone) [Multiple Purchase Discounts Available]](http://store.karatz.jp/cdn/shop/files/P1010004_ac0912bb-9453-4391-8a82-c6dd4e4f39e7.jpg?v=1755307752&width=4000)
![[Limited to 7 stones] Gem gacha💎 Australian opal or Mexican cantera opal 1 loose stone (with defects) [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_b7a430e1-0f20-4abd-a80a-4f266df831e4.png?v=1745377088&width=2000)
Pt950 Brazilian Paraiba Tourmaline 0.131ct Ring
Sale price¥128,000
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.
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.
業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。
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.