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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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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 5.0mm/0.517ctルース

[11/2 22:00] Pakistani Peridot 5.0mm/0.517ct Loose Stone Sale price¥9,800
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

[11/5 22:00] 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
[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
[Limited to 6 stones] [Mr. Sanjay] Mexican opal or Sri Lankan spinel 1 loose stone (with defects) [Multiple purchase discount available]

[Limited to 6 stones] [Mr. Sanjay] Mexican opal or Sri Lankan spinel 1 loose stone (with defects) [Multiple purchase discount available] Sale price¥3,980
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
[Available at 10 PM on August 2nd] Limited to 8 stones: Nobu Buff Top x Rose Cut Spinel (1 loose stone) [Multiple purchase discounts available]

[Available at 10 PM on August 2nd] Limited to 8 stones: Nobu Buff Top x Rose Cut Spinel (1 loose stone) [Multiple purchase discounts available] Sale price¥6,980
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] Sale price¥2,980
[Available at 10 PM on August 9th] Limited Quantity: 1.5mm Pink Spinel from Myanmar (including Hot Pink Spinel) [Multiple Purchase Discounts Available]

[Available at 10 PM on August 9th] Limited Quantity: 1.5mm Pink Spinel from Myanmar (including Hot Pink Spinel) [Multiple Purchase Discounts Available] Sale price¥2,580
[Available at 10 PM on August 9th] Limited to 4 stones: Peridot (Flanders Cut) x 1 stone [Multiple purchase discounts available]

[Available at 10 PM on August 9th] Limited to 4 stones: Peridot (Flanders Cut) x 1 stone [Multiple purchase discounts available] Sale price¥5,980
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
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
[Available at 10 PM on August 10th] Limited to 27 stones: Peridot (Trilliant Cut) 1 stone (5.0-5.5mm) [Multiple purchase discounts available]

[Available at 10 PM on August 10th] 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
[On Sale 10/19 at 10 PM] [Limited to 10 stones] Spinel Gacha Loose Stone, Including 1.17ct Bicolor Spinel [Multiple Purchase Discounts Available]

[On Sale 10/19 at 10 PM] [Limited to 10 stones] Spinel Gacha Loose Stone, Including 1.17ct Bicolor Spinel [Multiple Purchase Discounts Available] Sale price¥4,980
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

[Available at 10:00 PM on October 19th] 18K Yellow Gold Ring with 0.44ct Oregon Sunstone from the United States, Pink Diamond, and Orange Spinel 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

[On Sale at 10pm on 10/25] Pakistani Ludwigite Peridot 0.615ct Loose Stone Sale price¥7,980
[Available at 10:00 PM on October 12th] Limited Quantity: Myanmar Gray Spinel/Platinum Spinel (2.0mm, Round Cut) Loose Stone [Multiple Purchase Discounts Available]

[Available at 10:00 PM on October 12th] Limited Quantity: Myanmar Gray Spinel/Platinum Spinel (2.0mm, Round Cut) 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
【KEN氏】ミャンマー産パープルスピネル 0.872ctルース - カラッツSTORE

Myanmar Purple Spinel 0.872ct Loose Stone Sale price¥8,800
パラサイティックペリドット 0.536ctルース

Paracytic peridot 0.536ct loose Sale price¥188,000
モザンビーク産シルキーピンクスピネル 0.610ctルース

Silky pink spinel from Mozambique 0.610ct loose Sale price¥18,800
スリランカ産スピネル 0.800ctルース

Spinel from Sri Lanka 0.800ct loose Sale price¥6,980
バイカラースピネル 0.737ctルース

Bicolor spinel 0.737ct loose Sale price¥25,800
ビルマ産バイカラースピネル 0.849ctルース

Burmese bicolor spinel 0.849ct loose Sale price¥35,800
Pink spinel 0.290ct loose

Pink spinel 0.290ct loose Sale price¥5,980
パープルスピネル 0.210ctルース

Purple spinel 0.210ct loose Sale price¥3,980
ラベンダースピネル 0.160ctルース

Lavender spinel 0.160ct loose Sale price¥3,980

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.