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 "
【7/27 22時販売】メキシコ産ファイアオパール 6mm/0.698ctルース（ローズカット）
Sale price¥14,800
【7/27 22時販売】スリランカ産トルマリン 4.860ctルース（クッションカット）
Sale price¥12,800
【7/27 22時販売】メキシコ産カンテラオパール 12.401ctルース
Sale price¥8,800
【7/27 22時販売】ブラジル産グリーントルマリン 0.541ctルース
Sale price¥4,980
[On sale at 10pm on 7/26] Mexican Cantera Opal 14.740ct loose stone
Sale price¥14,800
[On sale at 10pm on 7/26] Australian boulder opal 1.026ct loose
Sale price¥3,980
[On sale at 10pm on 7/25] Australian boulder opal 14.860ct loose
Sale price¥18,800
[On sale at 10pm on 7/24] Mexican fire opal 0.353ct loose stone
Sale price¥4,980
[On sale at 10pm on 7/24] Mexican Cantera Opal 32.560ct loose stone
Sale price¥29,800
[On sale at 10pm on 7/23] Mozambique rubellite 0.748ct loose stone
Sale price¥9,800
[On sale at 10pm on 7/19] Mexican Opal 0.498ct Loose (Contrarus Opal)
Sale price¥12,800
![[On sale at 10pm on 7/17] Mexican Cantera Opal 2.661ct loose stone](http://store.karatz.jp/cdn/shop/products/PC299540_08d9b820-6953-4088-85ec-85e2a784250a.jpg?v=1752706388&width=4000)
[On sale at 10pm on 7/17] Mexican Cantera Opal 2.661ct loose stone
Sale price¥12,800
[On sale at 10pm on 7/15] Mexican Cantera Opal 27.410ct loose stone
Sale price¥39,800
![[7/15 22:00 Sale] Australian Iron Opal 20.328ct Loose Stone, Japan-Germany](http://store.karatz.jp/cdn/shop/products/P5259918_a6c1d432-7a73-40f7-bade-f86db6a21772.jpg?v=1752486757&width=3180)
[On sale at 10pm on 7/10] Mexican Cantera Opal 8.331ct loose stone
Sale price¥39,800
[On sale at 10pm on 7/12] Mexican Cantera Opal 11.885ct loose stone
Sale price¥49,800
Mexican Fire Opal (Faceted Cut) 0.844ct Loose
Sale price¥15,800
[On sale at 10pm on 7/10] Brazilian green tourmaline 3.943ct loose stone
Sale price¥39,800
[On sale at 10pm on 7/8] Mexican Hyalite Opal 0.942ct Loose
Sale price¥9,800
[On sale 7/6 at 10pm] Mexican Hyalite Opal 6.0mm/0.708ct Loose
Sale price¥25,800
[On sale at 10pm on 7/4] Brazilian bicolor tourmaline 13.927ct loose stone
Sale price¥198,000
1 green opal from Amazon《Discount available for multiple purchases》
Sale price¥2,980
![[Limited to 24 stones] Tourmaline Gacha💎Indigolite tourmaline, clover cut, and other single loose stones {Multiple purchase discounts available}](http://store.karatz.jp/cdn/shop/files/P3260066_db1fef34-9e00-4e51-bd72-9465f452c506.jpg?v=1711842063&width=4000)
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.
