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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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[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥12,800
タンザニア産パープルスピネル 0.751ctルース

【8/29 22時販売】タンザニア産パープルスピネル 0.751ctルース Sale price¥18,800
パキスタン産ペリドット 5.2mm/0.562ctルース

Pakistani Peridot 5.2mm/0.562ct Loose Stone Sale price¥9,800
アメリカ産ペリドット 1.280ctルース

【9/1 22時販売】アメリカ産ペリドット 1.280ctルース Sale price¥18,800
アメリカ産ペリドット 0.803ctルース

【9/1 22時販売】アメリカ産ペリドット 0.803ctルース Sale price¥9,800
【9/2 22時販売】タンザニア産マヘンゲスピネル（ピンクスピネル） 0.366ctルース 鑑別書

【9/2 22時販売】タンザニア産マヘンゲスピネル（ピンクスピネル） 0.366ctルース 鑑別書 Sale price¥39,800
ミャンマー産ペリドット 3.748ctルース（スター効果有り）

[Posted 12549460] Star peridot from Myanmar 3.748ct loose Sale price¥19,800
ミャンマー産ペリドット 5.973ctルース（スター効果有り）

[Updated 12546024] Ametrine 4.206ct loose Sale price¥39,800
タンザニア産スピネル 0.644ctルース

[On sale August 27th at 10 PM] Tanzanian spinel, 0.644ct loose stone (with needle inclusions) with a gemological report Sale price¥19,800
タンザニア産スピネル 0.536ctルース

[On sale August 27 at 10 PM] Tanzanian Spinel 0.536ct Loose (with needle inclusions) - with appraisal report Sale price¥15,800
タンザニア産レッドスピネル 0.177ctルース

【12563732 Posted】Tanzanian Red Spinel 0.177ct Loose Sale price¥35,800
タンザニア産スピネル 1.154ctルース

[Posted on 12564182] Tanzanian Spinel 1.154ct Loose Gemstone Sale price¥39,800
タンザニア産スピネル 1.117ctルース

[Posted 12564181] Tanzanian Spinel 1.117ct Loose Stone Sale price¥39,800
タンザニア産レッドスピネル 0.241ctルース 鑑別書

[Listed as 12563733] Tanzania Red Spinel 0.241ct Loose Stone Sale price¥43,800
タンザニア産アヤナスピネル（ホットピンクスピネル） 0.181ctルース 鑑別書

[Published as 12563759] Tanzanian Ayanad Spinel (Hot Pink Spinel) 0.181ct Loose Gemstone Sale price¥25,800
ビルマ産非加熱ジェダイスピネル 0.430ctルース GUILD

[Lottery Sale 0812_17] Unheated Burmese Jedi Spinel 0.430ct Loose Gemstone GUILD Sale price¥118,000
タンザニア産マヘンゲスピネル（ピンクスピネル） 0.492ctルース 鑑別書

[#202607 Akihabara Pop-up Store - Currently Removed from Stock] [12563475 Posted] Mahenge Spinel (Pink Spinel) from Tanzania 0.492ct Loose Stone Sale price¥49,800
タンザニア産レッドスピネル 0.291ctルース

[#202607 Akihabara Pop-up Store - Currently out on loan] [Listed as 12563392] Tanzanian Red Spinel 0.291ct Loose Stone Sale price¥35,800
タンザニア産パープルスピネル 0.427ctルース

[Lottery Sale 0725_03] Tanzania Purple Spinel 0.427ct Loose Stone with Certificate Sale price¥29,800
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 Sale price¥9,800
Raw peridot + 2 loose stones set (August birthstone)《Discount available for multiple purchases》

Raw peridot + 2 loose stones set (August birthstone)《Discount available for multiple purchases》 Sale price¥2,980
ピンクスピネル1

1 stone loose pink spinel (princess cut, approx. 2.5mm)《Discount available for multiple purchases》 Sale price¥2,980
{For beginners} Gem gacha💎 1 loose gemstone (Chrome tourmaline, Mahenge spinel, etc.) cut by Sri Lankan craftsman Sanjay {Multiple purchase discounts available}

{For beginners} Gem gacha💎 1 loose gemstone (Chrome tourmaline, Mahenge spinel, etc.) cut by Sri Lankan craftsman Sanjay {Multiple purchase discounts available} Sale price¥3,980
ビルマ産スピネル1石ルース（ペンタゴナルカット）《バンコク買付品》

1 stone loose spinel from Myanmar (Pentagonal cut)《Discount available for multiple purchases》 Sale price¥3,980
《Limited to 15 stones》Lab Grown Diamond Gacha💎Includes a 1.02ct/D/VS1/3EX certified lab grown diamond, usually priced at ¥50,000 (with 1 synthetic cobalt spinel as a bonus) 《Bulk Purchase Discount Available》

《Limited to 15 stones》Lab Grown Diamond Gacha💎Includes a 1.02ct/D/VS1/3EX certified lab grown diamond, usually priced at ¥50,000 (with 1 synthetic cobalt spinel as a bonus) 《Bulk Purchase Discount Available》 Sale price¥5,980
Gem Gacha💎 Custom cut spinel《August birthstone》《Multiple purchase discounts available》

Gem Gacha💎 Custom cut spinel《August birthstone》《Multiple purchase discounts available》 Sale price¥3,980
Limited Quantity: 1.5mm Pink Spinel from Myanmar (including Hot Pink Spinel) - Multiple Purchase Discounts Available

Limited Quantity: 1.5mm Pink Spinel from Myanmar (including Hot Pink Spinel) - Multiple Purchase Discounts Available Sale price¥2,580
タンザニア・マヘンゲ産ピンクスピネル原石・ルース2石セット（プリンセスカット）《複数購入割引有》

《Limited to 20 stones》 Pink spinel raw stone from Mahenge, Tanzania, loose 2 stone set (princess cut)《Multiple purchase discount available》 Sale price¥3,980
Gem Gacha💎 Custom cut spinel《August birthstone》《Multiple purchase discounts available》

Gem Gacha💎 Custom cut spinel《August birthstone》《Multiple purchase discounts available》 Sale price¥5,980
Limited Quantity: Myanmar Gray Spinel/Platinum Spinel (2.0mm, Round Cut) - Single Loose Stone (Multiple Purchase Discounts Available)

Limited Quantity: Myanmar Gray Spinel/Platinum Spinel (2.0mm, Round Cut) - Single Loose Stone (Multiple Purchase Discounts Available) Sale price¥4,980
Limited to 18 stones: Myanmar spinel (3.5mm, pentagonal cut) 1 loose stone. Discounts available for multiple purchases.

Limited to 18 stones: Myanmar spinel (3.5mm, pentagonal cut) 1 loose stone. Discounts available for multiple purchases. Sale price¥2,980
Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases

Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases Sale price¥4,980
Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases

Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases Sale price¥6,980
《Limited to 11 stones》Koshu Kiseki Kiriko plusthree Peridot (including lilypad) & Monsieur Saint-Jude cut peridot gacha《Multiple purchase discount available》

《Limited to 11 stones》Koshu Kiseki Kiriko plusthree Peridot (including lilypad) & Monsieur Saint-Jude cut peridot gacha《Multiple purchase discount available》 Sale price¥4,980
Limited to 8 stones: Nobu buff top x rose cut spinel, 1 loose stone. Discounts available for multiple purchases.

Limited to 8 stones: Nobu buff top x rose cut spinel, 1 loose stone. Discounts available for multiple purchases. Sale price¥6,980
Limited to 7 stones: 1 loose stone of spinel (blue/purple) from Madagascar. Discounts available for multiple purchases.

Limited to 7 stones: 1 loose stone of spinel (blue/purple) from Madagascar. Discounts available for multiple purchases. Sale price¥3,980
Myanmar Red Spinel (Pear Shape, approx. 4x3mm) - Only 1 Stone Left! - Multi-Purchase Discount Available

Myanmar Red Spinel (Pear Shape, approx. 4x3mm) - Only 1 Stone Left! - Multi-Purchase Discount Available Sale price¥9,800
Limited to 27 stones: Peridot (Trilliant Cut) 1 stone (5.0-5.5mm) Multiple purchase discounts available

Limited to 27 stones: Peridot (Trilliant Cut) 1 stone (5.0-5.5mm) Multiple purchase discounts available Sale price¥6,980
ビルマ産レッドスピネル 0.236ctルース

[On Sale August 16, 10 PM] Burmese Red Spinel 0.236ct Loose Stone with Certificate Sale price¥45,800
タンザニア産アヤナスピネル（ホットピンクスピネル） 0.182ctルース 鑑別書

[On sale August 2 at 10 PM JST] Tanzanian Ayana spinel (hot pink spinel) 0.182 ct loose stone with gemological report Sale price¥25,800
タンザニア産アヤナスピネル（ホットピンクスピネル）3.0mm/ 0.107ctルース

Tanzanian Ayana spinel (hot pink spinel) 3.0mm/0.107ct loose Sale price¥18,800
《Limited to 12 Stones》 Pink Spinel from Tanzania (Approx. 3x4mm, Oval Cut) 《Multiple Purchase Discount Available》

《Limited to 12 Stones》 Pink Spinel from Tanzania (Approx. 3x4mm, Oval Cut) 《Multiple Purchase Discount Available》 Sale price¥5,980
ミャンマー産レッドスピネル 0.229ctルース 鑑別書

0.229 ct Loose Red Spinel from Myanmar with Certificate Sale price¥45,800
タンザニア産ピンクスピネル 0.148ctルース

[Posted on 12563395] Tanzanian Pink Spinel 0.148ct Loose Gemstone Sale price¥22,800
タンザニア産マヘンゲスピネル（ピンクスピネル） 0.566ctルース

Tanzanian Mahenge Spinel (Pink Spinel) 0.566ct Loose Stone with Certification Sale price¥55,800
タンザニア産マヘンゲスピネル（ピンクスピネル） 0.333ctルース

0.333ct Loose Mahenge (Pink) Spinel from Tanzania with Certificate Sale price¥29,800
スリランカ産コバルトスピネル 0.281ctルース

Sri Lankan cobalt spinel 0.281ct loose stone Sale price¥55,800

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.

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.