Login
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 "

Sort by
Sold out Limited Stock! Rare Stone Gacha with Certificate of Authenticity (Taaffeite, Bicolor Spinel, and Benitoite) - 1 Loose Stone (Multiple Purchase Discounts Available)

Limited Stock! Rare Stone Gacha with Certificate of Authenticity (Taaffeite, Bicolor Spinel, and Benitoite) - 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]

[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
[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
[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
レッドスピネル 0.346ctルース

[Published on 12560213] Red Spinel 0.346ct Loose Sale price¥22,800
【KEN氏】ヴァイオレットスピネル 0.514ctルース - カラッツSTORE

Violet spinel 0.514ct loose stone Sale price¥6,980
【KEN氏】パープルスピネル 0.825ctルース - カラッツSTORE

Purple spinel 0.825ct loose stone Sale price¥5,980
[12560198] American Peridot 0.423ct Loose Stone

[12560198] American Peridot 0.423ct Loose Stone Sale price¥6,980
アメリカ産ペリドット 0.458ctルース

[On Sale at 10 PM on August 20th] American Peridot 0.458ct Loose Stone Sale price¥6,980
アメリカ産ペリドット 0.546ctルース

[On Sale at 10 PM on August 20th] American Peridot 0.546ct Loose Stone Sale price¥5,980
アメリカ産ペリドット 0.339ctルース

[On sale from 10pm on August 21st] American Peridot 0.339ct Loose Stone Sale price¥6,980
ミャンマー産レッドスピネル 0.174ctルース

[8/10 22:00 Sale] Myanmar Red Spinel 0.174ct Loose Sale price¥8,800
ミャンマー産スタースピネル 1.160ctルース

Star spinel from Myanmar 1.004ct loose Sale price¥14,800
【KEN氏】ミャンマー産ピンクスピネル 0.325ctルース - カラッツSTORE

Myanmar pink spinel 0.325ct loose stone Sale price¥6,980
【KEN氏】ミャンマー産パープルスピネル 0.312ctルース - カラッツSTORE

Myanmar Purple Spinel 0.312ct Loose Stone Sale price¥3,980
ミャンマー産スタースピネル 1.160ctルース

Myanmar star spinel 1.160ct loose Sale price¥12,800
スタースピネル 1.295ctルース

Star spinel 1.295ct loose Sale price¥11,800
ラベンダースピネル 1.285ctルース

Lavender spinel 1.285ct loose Sale price¥39,800
アメリカ産ペリドット 0.566ctルース

[On Sale at 10 PM on August 9th] American Peridot 5.1mm/0.566ct Loose Stone Sale price¥9,800
アメリカ産ペリドット 0.511ctルース

[On Sale at 10 PM on August 4th] American Peridot 5.0mm/0.511ct Loose Stone Sale price¥9,800
アメリカ産ペリドット 0.488ctルース

[On Sale at 10 PM on August 9th] American Peridot 4.9mm/0.488ct Loose Stone Sale price¥8,800
アメリカ産ペリドット 0.370ctルース

[On Sale at 10 PM on August 17th] American Peridot 4.5mm/0.370ct Loose Stone Sale price¥8,800
【KEN氏】ミャンマー産ピンクスピネル 0.294ctルース - カラッツSTORE

Myanmar pink spinel 0.294ct loose stone Sale price¥6,980
[Resale] [Jeweler's Tools] Black Light, 3 Loose Stones (Ruby, Red Spinel, Oil in Quartz) with Rechargeable Battery

[Resale] [Jeweler's Tools] Black Light, 3 Loose Stones (Ruby, Red Spinel, Oil in Quartz) with Rechargeable Battery Sale price¥6,980
[Available on Saturday, August 16th at 10 PM] "PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device-Inspired Ring - Enforcer Design [Kogami Shinya Model] "Blue Spinel"

[Available on Saturday, August 16th at 10 PM] "PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device-Inspired 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
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
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
{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
Myanmar gray spinel, platinum spinel (2mm, round cut) 1 loose stone {Multiple purchase discount available}

Myanmar gray spinel, platinum spinel (2mm, round cut) 1 loose stone {Multiple purchase discount available} Sale price¥5,980
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. Sale price¥4,980
[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
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
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
スピネル 1石《カスタムカット》

Spinel 1 stone《Custom cut》《Multiple purchase discount 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
Limited to 10 stones Gem gacha💎 [Mr. Sanje] Tanzanian spinel (1 in 3 will be a red spinel) 1 loose stone [Multiple purchase discounts available]

Limited to 10 stones Gem gacha💎 [Mr. Sanje] Tanzanian spinel (1 in 3 will be a red spinel) 1 loose stone [Multiple purchase discounts available] Sale price¥5,980
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¥8,000
タンザニア産コバルトスピネル 0.458ctルース

Tanzanian Cobalt Spinel 0.458ct Loose Stone with Certificate of Authenticity Sale price¥69,800
インドネシア産パラサイティックペリドット・キャッツアイ 0.489ctルース

Indonesian Parasitic Peridot Cat's Eye 0.489ct Loose Stone Sale price¥158,000
ミャンマー産レッドスピネル 0.182ctルース

Myanmar Red Spinel 3.5mm/0.182ct Loose Stone Sale price¥8,800
マダガスカル産パープルスピネル 0.870ctルース

0.870ct loose purple spinel from Madagascar Sale price¥14,800
マダガスカル産パープルスピネル 0.651ctルース

Madagascar Purple Spinel 5.2mm/0.651ct Loose Stone Sale price¥8,800
オレンジスピネル 0.225ctルース

Orange spinel 0.225ct loose stone 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.

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の取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

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.