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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 at 10 PM on January 6th] Sri Lankan Blue Spinel 1.218ct Loose Stone with Certificate of Authenticity

[On Sale at 10 PM on January 6th] Sri Lankan Blue Spinel 1.218ct Loose Stone with Certificate of Authenticity Sale price¥45,800
[1/5 22:00 Sale] Parasitic Peridot 0.241ct Loose Stone, Japan-Germany Qualification

[1/5 22:00 Sale] Parasitic Peridot 0.241ct Loose Stone, Japan-Germany Qualification Sale price¥98,000
[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery

[Jeweler's Tools] 3 black light loose pieces (ruby, red spinel rough, oil-in-quartz) with rechargeable battery Sale price¥6,980
"PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device Image Ring - Enforcer Design [Kogami Shinya Model] "Blue Spinel"

"PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device Image Ring - Enforcer Design [Kogami Shinya Model] "Blue Spinel" Sale priceFrom ¥25,800
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
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
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
{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
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
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
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
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 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 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
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]

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

Limited to 4 stones: 1 peridot (Flanders cut) [Multiple purchase discounts available] Sale price¥5,980
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. Sale price¥4,980
スピネル 0.705ctルース（ローズカット）

Spinel 0.705ct loose (rose cut) Sale price¥6,980
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
Central Gem Research Institute Non-heated Issuance fee for certificate of authenticity (optional)

Central Gem Research Institute Non-heated Issuance fee for certificate of authenticity (optional) Sale price¥10,000
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
[12/14 22:00] American Peridot 5.1mm/0.573ct Loose Stone

[12/14 22:00] American Peridot 5.1mm/0.573ct Loose Stone Sale price¥9,800
[12/7 22:00] American Peridot 0.385ct Loose Stone

[12/7 22:00] American Peridot 0.385ct Loose Stone Sale price¥8,800
[On Sale at 10 PM on December 9th] American Peridot 0.855ct Loose Stone (Lily Pad Inclusions)

[On Sale at 10 PM on December 9th] American Peridot 0.855ct Loose Stone (Lily Pad Inclusions) Sale price¥12,800
[12/6 22:00] Myanmar Spinel in Marble 61.204ct Loose Stone

[12/6 22:00] Myanmar Spinel in Marble 61.204ct Loose Stone Sale price¥12,800
【サンジェ氏】パープルスピネル 0.995ctルース

Purple spinel 0.995ct loose stone Sale price¥15,800
[12/25 22:00 Sale] Spinel 0.310ct Loose

[12/25 22:00 Sale] Spinel 0.310ct Loose Sale price¥6,980
[Available at 10 PM on December 5th] 18K Yellow Gold Burmese Pink Spinel 3.9mm/0.276ct Hot Pink Spinel Ring

[Available at 10 PM on December 5th] 18K Yellow Gold Burmese Pink Spinel 3.9mm/0.276ct Hot Pink Spinel Ring Sale price¥128,000
ピンクスピネル 0.409ctルース

Pink spinel 0.409ct loose Sale price¥6,980
ベトナム産コバルトスピネル 2mm/0.031ctルース 日独鑑

Cobalt spinel from Vietnam 2mm/0.031ct loose Japanese-German edition Sale price¥59,800
ホットピンクスピネル 0.203ctルース（マヘンゲスピネル）

Hot Pink Spinel 0.203ct Loose (Mahenge Spinel) Sale price¥8,800
ピンクスピネル 3.208ctルース

Pink spinel 3.208ct loose Sale price¥98,000
スリランカ産スピネル 0.276ctルース

Spinel from Sri Lanka 0.276ct loose Sale price¥2,980
アメリカ産ペリドット 0.635ctルース

[11/2 22:00 Sale] American Peridot 0.635ct Loose Stone Sale price¥12,800
アメリカ産ペリドット 0.283ctルース

[11/2 22:00] American Peridot 0.283ct Loose Stone Sale price¥8,800
パキスタン産ペリドット 5.2mm/0.562ctルース

[11/2 22:00] Pakistani Peridot 5.2mm/0.562ct Loose Stone Sale price¥9,800
パキスタン産ペリドット 1.176ctルース

Pakistani Peridot 1.176ct Loose Stone Sale price¥9,800
スリランカ産パープルスピネル 1.060ctルース

[10/31 22:00 Sale] Sri Lankan Purple Spinel 1.060ct Loose Sale price¥98,000
Parasite Peridot (Paracytic Peridot) 0.541ct Loose Japanese-German Edition

Parasite Peridot (Paracytic Peridot) 0.541ct Loose Japanese-German Edition Sale price¥256,000
K18YG アメリカ産オレゴンサンストーン 0.44ct・ピンクダイヤモンド・オレンジスピネル リング

18K Yellow Gold American Oregon Sunstone 0.44ct, Pink Diamond, Orange Spinel Ring Sale price¥158,000
パキスタン産ルードヴィッヒアイトインペリドット 0.615ctルース

Pakistani Ludwigite Peridot 0.615ct Loose Stone Sale price¥7,980
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
パラサイティックペリドット 0.292ctルース

Parasitic Peridot 0.292ct Loose Stone Sale price¥98,000
スピネル 0.950ctルース

Burmese spinel 0.950ct loose (buff top) Sale price¥15,800
ミャンマー産ピンクスピネル 0.650ctルース - カラッツSTORE

Myanmar Pink Spinel 0.650ct Loose Sale price¥16,800
Red spinel 0.195ct loose

Red spinel 0.195ct loose Sale price¥5,980
ミャンマー産ピンクスピネル 0.291ctルース - カラッツSTORE

Myanmar pink spinel 0.291ct loose stone Sale price¥6,980

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.