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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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《Only a few left》 Brazilian Paraiba Tourmaline (Batalia) Gacha💎1.2mm 1 out of 10 stones contains Cu&Mn (CuO:2.1%, MnO:0.9%/CuO:1.6%, MnO:1.5%) 《Multiple purchase discounts available》

《Only a few left》 Brazilian Paraiba Tourmaline (Batalia) Gacha💎1.2mm 1 out of 10 stones contains Cu&Mn (CuO:2.1%, MnO:0.9%/CuO:1.6%, MnO:1.5%) 《Multiple purchase discounts available》 Sale price¥4,980
[On sale from 10pm on 4/26] {7 stones only} Gem gacha💎 Australian opal or Mexican cantera opal 1 loose stone (damaged) {Multiple purchase discounts available}

[On sale from 10pm on 4/26] {7 stones only} Gem gacha💎 Australian opal or Mexican cantera opal 1 loose stone (damaged) {Multiple purchase discounts available} Sale price¥2,980
ブラジル産パライバトルマリン 0.215ctルース（CuO:1.1%、MnO:3.3%）

【5/21 22時販売】ブラジル産パライバトルマリン 0.215ctルース（CuO:1.1%、MnO:3.3%） Sale price¥55,800
【5/21 22時販売】オーストラリア産アイアンオパール 17.450ctルース

【5/21 22時販売】オーストラリア産アイアンオパール 17.450ctルース Sale price¥12,800
【12530690掲載】ボルダーオパール 41.770ctルース

【5/20 22時販売】オーストラリア産ボルダーオパール 41.770ctルース Sale price¥29,800
ボルダーオパール 15.020ctルース

【5/20 22時販売】オーストラリア産ボルダーオパール 15.020ctルース Sale price¥18,800
【5/20 22時販売】オーストラリア産ボルダーオパール 12.220ctルース

【5/20 22時販売】オーストラリア産ボルダーオパール 12.220ctルース Sale price¥12,800
【KEN氏】メキシコ産ファイアオパール 1.330ctルース - カラッツSTORE

[On sale from 10pm on 5/19] Mexican Fire Opal 1.330ct Loose (Contralus Opal) Sale price¥19,800
【KEN氏】メキシコ産ファイアオパール 1.610ctルース - カラッツSTORE

[On sale from 10pm on 5/19] Mexican Fire Opal 1.610ct Loose (Contralus Opal) Sale price¥19,800
グリーントルマリンキャッツアイ 5.210ctルース

[On sale from 10pm on 5/18] Brazilian Green Tourmaline Cat's Eye 5.210ct Loose Sale price¥25,800
【12529239掲載】バイカラートルマリン 4.554ctルース

[On sale from 10pm on 5/18] Brazilian bicolor tourmaline 4.554ct loose stone from Nikkei Sale price¥298,000
メキシコ産カンテラオパール 6.112ctルース

[On sale from 10pm on 5/16] Mexican Cantera Opal 6.112ct loose stone Sale price¥59,800
オーストラリア産ホワイトオパール 2.318ctルース

[On sale from 10pm on 5/18] Australian white opal 2.318ct loose Sale price¥12,800
オーストラリア産オパール 1.390ctルース

[On sale from 10pm on 5/18] Australian Opal 1.390ct Loose Sale price¥9,800
[On sale at 22:00 on 5/15] Brazilian bicolor tourmaline 7.445ct loose stone

[On sale at 22:00 on 5/15] Brazilian bicolor tourmaline 7.445ct loose stone Sale price¥69,800
バイカラートルマリンキャッツアイ 4.730ctルース

[On sale from 10pm on 5/14] Brazilian bicolor tourmaline cat's eye 9.5mm/4.730ct loose stone Sale price¥18,800
合成ブラックオパール 5.013ctルース

[On sale at 22:00 on 5/13] Synthetic black opal 5.013ct loose stone Sale price¥59,800
バイカラートルマリン 6.258ctルース（トリカラートルマリン）

[On sale from 10pm on 5/11] Brazilian bicolor tourmaline 6.258ct loose stone (tricolor tourmaline) Sale price¥148,000
バイカラートルマリンキャッツアイ 2.640ctルース

[On sale from 10pm on 5/9] Brazilian bicolor tourmaline cat's eye 2.640ct loose stone Sale price¥12,800
[On sale from 10pm on 5/9] Brazilian Green Tourmaline Cat's Eye 3.310ct Loose

[On sale from 10pm on 5/9] Brazilian Green Tourmaline Cat's Eye 3.310ct Loose Sale price¥5,980
ブラジル産パライバトルマリン 0.225ct原石（ CuO:2.1%、MnO:0.9%）

[On sale from 10pm on 5/9] Brazilian Paraiba Tourmaline 0.225ct rough stone (CuO: 2.1%, MnO: 0.9%) Sale price¥8,800
ボルダーオパール 6.160ctルース

[On sale 5/6 at 22:00] Australian boulder opal 6.160ct loose Sale price¥18,800
【12530682掲載】ボルダーオパール 4.980ctルース

[On sale 5/6 at 22:00] Australian boulder opal 4.980ct loose Sale price¥19,800
ブラックオパール 2.530ctルース

[On sale at 22:00 on 5/5] Alluraria black opal 2.530ct loose Sale price¥29,800
[On sale from 10pm on 5/6] [Limited to 8 stones] 1 loose Mexican fire opal with a unique color (up to 2.2ct) [Multiple purchase discounts available]

[On sale from 10pm on 5/6] [Limited to 8 stones] 1 loose Mexican fire opal with a unique color (up to 2.2ct) [Multiple purchase discounts available] Sale price¥3,980
カンテラオパール 18.00ctルース

[On sale 5/4 at 10pm] Mexican Cantera Opal 18.00ct loose stone Sale price¥29,800
メキシコ産ファイアオパール 1.320ctルース

[On sale 5/3 at 22:00] Mexican fire opal 1.320ct loose stone Sale price¥13,800
メキシコ産ウォーターオパール 0.304ctルース

[On sale from 22:00 on 5/5] Mexican water opal 0.304ct loose stone Sale price¥8,800
メキシコ産ウォーターオパール 0.194ctルース

[On sale from 10pm on 5/9] Mexican water opal 0.194ct loose stone Sale price¥6,980
メキシコ産ウォーターオパール 0.300ctルース

[On sale 5/3 at 22:00] Mexican water opal 0.300ct loose Sale price¥8,800
メキシコ産ウォーターオパール 0.404ctルース

[On sale from 22:00 on 5/5] Mexican water opal 0.404ct loose stone Sale price¥12,800
メキシコ産オパール 0.513ctルース

[On sale from 10pm on 5/9] Mexican opal 0.513ct loose stone Sale price¥8,800
メキシコ産オパール 0.461ctルース

[On sale 5/3 at 10pm] Mexican Opal 0.461ct Loose Sale price¥8,800
オーストラリア産オパール 0.371ctルース

[On sale 5/3 at 10pm] Australian Opal 0.371ct Loose Sale price¥8,800
オーストラリア産オパール 0.678ctルース

[On sale from 10pm on 5/9] Australian opal 0.678ct loose Sale price¥5,980
オーストラリア産オパール 0.658ctルース

[On sale from 10pm on 5/9] Australian opal 0.658ct loose Sale price¥8,800
オーストラリア産オパール 0.423ctルース

[On sale from 10pm on 5/5] Australian opal 0.423ct loose Sale price¥6,980
オーストラリア産オパール 0.706ctルース

[On sale from 10pm on 5/5] Australian opal 0.706ct loose stone Sale price¥8,800
オーストラリア産オパール 0.633ctルース

[On sale from 10pm on 5/5] Australian opal 0.633ct loose Sale price¥9,800
ブラジル産パライバトルマリン 0.184ct原石（CuO:1.5%、MnO:0.6%）

[On sale from 10pm on 5/1] Brazilian Paraiba tourmaline 0.184ct rough stone (CuO: 1.5%, MnO: 0.6%) Sale price¥12,800
ブラジル産パライバトルマリン 0.180ct原石（ CuO:1.8%、MnO:0.1%）

[On sale from 10pm on 5/1] Brazilian Paraiba Tourmaline 0.180ct rough stone (CuO: 1.8%, MnO: 0.1%) Sale price¥12,800
[On sale at 10pm on 4/28] Brazilian Paraiba Tourmaline in Quartz 3.678ct loose stone

[On sale at 10pm on 4/28] Brazilian Paraiba Tourmaline in Quartz 3.678ct loose stone Sale price¥9,800
ブラジル産バイカラートルマリン 12.842ctルース

[On sale from 10pm on 4/27] Brazilian bicolor tourmaline 12.842ct loose stone Sale price¥298,000
ナイジェリア産ピンクトルマリン 1.527ctルース

[On sale from 22:00 on 5/6] Nigerian pink tourmaline 1.527ct loose stone Sale price¥18,800
[On sale from 10pm on 4/26] {Limited to 2 stones} 1 loose Australian opal (pear cut) {Multiple purchase discounts available}

[On sale from 10pm on 4/26] {Limited to 2 stones} 1 loose Australian opal (pear cut) {Multiple purchase discounts available} Sale price¥2,980
メキシコ産ハイアライトオパール 0.348ctルース

[On sale from 10pm on 5/10] Mexican Hyalite Opal 4.9mm/0.348ct Loose Sale price¥12,800
メキシコ産ハイアライトオパール 1.134ctルース

[On sale from 10pm on 5/10] Mexican Hyalite Opal 6.9mm/1.134ct Loose Sale price¥25,800
メキシコ産ハイアライトオパール 0.439ctルース

[On sale from 10pm on 5/1] Mexican Hyalite Opal 5.2mm/0.439ct Loose Sale price¥12,800

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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