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8月誕生石

August birthstone

August's birthstones are peridot , sardonyx , and spinel .

Peridot is a gemstone with an impressive refreshing green color like young grass. The mineral name olivine is said to be derived from its resemblance to the color of an olive fruit. It is said that it is sometimes included in meteorites, and they are called parasitic peridots .

Sardonyx is a type of agate , and refers to agate with striped patterns on a brown to reddish brown background. It is a gemstone that has been used as a material for cameos and intaglios since ancient times, and has been loved mainly in Europe. Those without stripes are called thirds.

Spinel is a gemstone that comes in many shades, including red, blue, and pink. It is often produced in the same octahedral shape as diamonds, and its rough form is also popular among collectors. With a high Mohs hardness of 8, it is a gemstone that can be enjoyed as everyday jewelry.

Karatz GemMagazine
" List of August birthstones and birthstones "

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Sold out Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for advanced users: rough spinel from Mozambique)

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for advanced users: rough spinel from Mozambique)

Sold out 1 stone peridot (pyramid cut, 5mm)《Multiple purchase discount available》

1 stone peridot (pyramid cut, 5mm)《Multiple purchase discount available》

Sold out Gem Gacha💎 Custom cut spinel《August birthstone》《Multiple purchase discounts available》

Gem Gacha💎 Custom cut spinel《August birthstone》《Multiple purchase discounts available》

Sold out 《Limited to 10 stones》Plumeria cut carving (Peridot, Blue Topaz, Citrine, Rose Quartz) 1 stone 《Bulk purchase discount available》

《Limited to 10 stones》Plumeria cut carving (Peridot, Blue Topaz, Citrine, Rose Quartz) 1 stone 《Bulk purchase discount available》
Sold out Limited Edition of 10 Blue Gemstones! 💎 0.142ct Brazilian Paraiba Tourmaline, Euclase from Zimbabwe, 1.17ct Cobalt Spinel (Certificate of Authenticity: Color Shift), Benitoite, and More! Discounts Available for Multiple Purchases!

Limited Edition of 10 Blue Gemstones! 💎 0.142ct Brazilian Paraiba Tourmaline, Euclase from Zimbabwe, 1.17ct Cobalt Spinel (Certificate of Authenticity: Color Shift), Benitoite, and More! Discounts Available for Multiple Purchases!
Sold out Limited to 10 stones: Blue Spinel Gacha, Cobalt Spinel (including color-shifting type), 2 stones with Japanese and German appraisal certificates, and a bonus synthetic cobalt spinel. Discounts available for multiple purchases.

Limited to 10 stones: Blue Spinel Gacha, Cobalt Spinel (including color-shifting type), 2 stones with Japanese and German appraisal certificates, and a bonus synthetic cobalt spinel. Discounts available for multiple purchases.
Sold out [On sale August 2nd at 10 PM JST] Limited to 15 stones: Peridot Gacha (August birthstone gacha) including a certificated parasitic peridot, normally ¥79,800. 1 stone with a free princess-cut peridot. Multiple purchase discount available.

[On sale August 2nd at 10 PM JST] Limited to 15 stones: Peridot Gacha (August birthstone gacha) including a certificated parasitic peridot, normally ¥79,800. 1 stone with a free princess-cut peridot. Multiple purchase discount available.
Sold out Limited to 10 stones! Spinel Gacha: 1 loose stone including a 1.17ct bicolor spinel. Multiple purchase discounts available.

Limited to 10 stones! Spinel Gacha: 1 loose stone including a 1.17ct bicolor spinel. Multiple purchase discounts available.
Sold out Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Sold out Color Change Gacha💎 Burmese Color Change Zircon, Color Shift Sapphire, Color Shift Cobalt Spinel, and More (Multiple Purchase Discounts Available)

Color Change Gacha💎 Burmese Color Change Zircon, Color Shift Sapphire, Color Shift Cobalt Spinel, and More (Multiple Purchase Discounts Available)
Sold out Limited to 7 stones: 1 loose Sri Lankan spinel (lozenge cut) stone. Discounts available for multiple purchases.

Limited to 7 stones: 1 loose Sri Lankan spinel (lozenge cut) stone. Discounts available for multiple purchases.
Sold out Limited to 9 stones [Mr. Sanjay] Oil in quartz, spinel, yellow opal 1 loose stone (damaged) [Multiple purchase discount available]

Limited to 9 stones [Mr. Sanjay] Oil in quartz, spinel, yellow opal 1 loose stone (damaged) [Multiple purchase discount available]

Sold out Limited to 13 stones: 1 red spinel rough stone from Myanmar. Discounts available for multiple purchases.

Limited to 13 stones: 1 red spinel rough stone from Myanmar. Discounts available for multiple purchases.
Sold out 《Limited to 8 Stones》Myanmar Black Spinel (Blemished) 《Bulk Purchase Discount Available》

《Limited to 8 Stones》Myanmar Black Spinel (Blemished) 《Bulk Purchase Discount Available》
Sold out Limited to 3 stones: Myanmar gray spinel and platinum spinel (4.0mm, round cut) loose stone (multiple purchase discounts available)

Limited to 3 stones: Myanmar gray spinel and platinum spinel (4.0mm, round cut) loose stone (multiple purchase discounts available)

Sold out Limited to 9 stones: 1 Spinel Gacha (August birthstone) including 1 bicolor spinel (0.93 ct) (Multiple purchase discounts available)

Limited to 9 stones: 1 Spinel Gacha (August birthstone) including 1 bicolor spinel (0.93 ct) (Multiple purchase discounts available)

Sold out Limited to 4 stones: 1 peridot (Flanders cut) [Multiple purchase discounts available]

Limited to 4 stones: 1 peridot (Flanders cut) [Multiple purchase discounts available]

Sold out Limited to 4 stones: 1 loose spinel stone from Sri Lanka. Discounts available for multiple purchases.

Limited to 4 stones: 1 loose spinel stone from Sri Lanka. Discounts available for multiple purchases.
Sold out K18WG ブルーサファイア パライバトルマリン、アクアマリン、エメラルド、アイスブルーダイヤモンド(トリートメント)、ブルーサファイア、イエローサファイア、アパタイト、ペリドット、タンザナイト、ブルートパーズリング鑑別書

【9/9 22時販売】【カラフリ】K18WG ブルーサファイア,パライバトルマリン,アクアマリン,エメラルド,アイスブルーダイヤ,イエローサファイア,アパタイト,ペリドット,タンザナイト,ブルートパーズリング鑑別書
Sold out [Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available

[Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available
Sold out パキスタン産ルードヴィッヒアイトインペリドット 1.624ctルース

【#202607 Akihabara Pop-up Items Out for Display】【12555648 Posted】Ludwigite in Peridot from Pakistan 1.624ct Loose
Sold out 【ダンデライオンカット】タンザニア産ブルースピネル 6.0mm/0.953ctルース 鑑別書鑑定士が運営しています。

[Dandelion Cut] Tanzanian Blue Spinel 6.0mm/0.953ct Loose Stone with Certificate

Sold out ミャンマー産グレースピネル（プラチナスピネル） 4.2mm/0.385ctルース

Burmese grey spinel (platinum spinel) 4.2mm/0.385ct loose gemstone
Sold out タンザニア産レッドスピネル 0.098ctルース 鑑別書

[12563393 listed] Tanzanian Red Spinel 0.098ct Loose Stone
Sold out タンザニア産ピンクスピネル 0.246ctルース

Tanzanian Pink Spinel 3.9mm/0.246ct Loose Stone with Appraisal

Sold out ミャンマー産ブラックスピネル 3.061ctルース

3.061ct Black Spinel Loose Stone from Myanmar with Certificate

Sold out ミャンマー産レッドスピネル 0.578ctルース

0.578ct Loose Burmese Red Spinel
Sold out ミャンマー産レッドスピネル 0.453ctルース

Myanmar red spinel 0.453 ct loose stone
Sold out ミャンマー産レッドスピネル 0.174ctルース

Myanmar red spinel, 3.5mm/0.174ct, loose
Sold out ミャンマー産レッドスピネル 0.194ctルース

Myanmar Red Spinel 3.4mm/0.194ct Loose Stone
Sold out ミャンマー産レッドスピネル 0.266ctルース

Burmese Red Spinel 0.266ct Loose Stone
Sold out ミャンマー産ジェダイスピネル 0.380ctルース

0.380ct Jedi spinel loose gemstone from Myanmar

Sold out スリランカ産スピネル 2.670ctルース

Spinel from Sri Lanka (Dark Green) 2.670ct Loose Stone [Certificated by GIA Japan, DGemG]
Sold out スリランカ産コバルトスピネル 0.461ctルース

Sri Lankan Cobalt Spinel 4.7mm/0.461ct Loose Stone with Japan-Germany Gemstone Report
Sold out ピンクスピネル 0.713ctルース

Pink spinel 0.713ct loose stone
Sold out K18 合成ルビー ペンダントトップ（ネックレストップ）

[Calafuri] K18 Synthetic Ruby and Synthetic Spinel Pendant Top (Necklace Top) with Appraisal Report
Sold out K18PG スピネル 0.48ct ペンダントトップ（ネックレストップ）

【CALAFULI】K18PG Pink Spinel 0.48ct Pendant Top with Identification Card
Sold out パープルスピネル 0.520ctルース

Purple spinel 0.520ct loose
Sold out Synthetic Cobalt Spinel 0.466ct Loose

Synthetic Cobalt Spinel 0.466ct Loose
Sold out 【12562825掲載】ミャンマー産マスグラバイト／スピネル 8.005ctルース

8.005ct Loose Myanmar Masgravite/Spinel (Symbiotic Type) with Japan-German Gemmological Institute (GGTL) Certificate

Sold out タンザニア産ホットピンクスピネル 0.204ctルース

Hot Pink Spinel from Tanzania, 0.204 ct, Loose Stone with Identification Report
Sold out 【12562750掲載】ミャンマー産レッドスピネル 0.257ctルース

Myanmar Red Spinel 3.7mm/0.257ct Loose Gemstone with Certificate

Sold out 【12562749掲載】タンザニア産オレンジスピネル 0.273ctルース

Tanzanian Orange Spinel 3.9mm/0.273ct Loose Stone with Gemstone Report

Sold out Synthetic Cobalt Spinel 0.831ct Loose Stone with Certificate of Authenticity

Synthetic Cobalt Spinel 0.831ct Loose Stone with Certificate of Authenticity
Sold out Synthetic Cobalt Spinel 1.342ct Loose Stone with Certificate

Synthetic Cobalt Spinel 1.342ct Loose Stone with Certificate
Sold out 【12561916掲載】ペリドット 0.632ctルース

US Peridot 0.632ct Loose Stone

Sold out Myanmar Red Spinel 0.196ct Loose Stone

Myanmar Red Spinel 0.196ct Loose Stone

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.