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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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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
[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
[On sale September 7th at 10 PM] Limited to 15 stones: ¥60,000 worth of Musgravite, Taaffeite, Cobalt Garnite, Spinel & Friends Gacha, and more (bonus: 1 Platinum Spinel) [Multiple purchase discounts available]

[On sale September 7th at 10 PM] Limited to 15 stones: ¥60,000 worth of Musgravite, Taaffeite, Cobalt Garnite, Spinel & Friends Gacha, and more (bonus: 1 Platinum Spinel) [Multiple purchase discounts available] Sale price¥8,800
{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
[Available at 10 PM on September 6th] Limited to 10 Blue Spinel Gacha - Includes 2 Cobalt Spinel (including color-shifted type) with Japanese and German appraisal certificates - Bonus Synthetic Cobalt Spinel (Multiple purchase discounts available)

[Available at 10 PM on September 6th] Limited to 10 Blue Spinel Gacha - Includes 2 Cobalt Spinel (including color-shifted type) with Japanese and German appraisal certificates - Bonus Synthetic Cobalt Spinel (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
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
[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
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
[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
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
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¥8,000
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
ミャンマー産ホットピンクスピネル 0.276ctルース

0.276ct loose hot pink spinel from Myanmar Sale price¥19,800
スピネル 0.545ctルース（ローズカット）

Spinel 0.545ct loose (rose cut) Sale price¥6,980
[On Sale at 10 PM on September 5th] Pt950 Myanmar Gray Spinel (Platinum Spinel) 5.5mm/0.685ct Black Diamond Ring

[On Sale at 10 PM on September 5th] Pt950 Myanmar Gray Spinel (Platinum Spinel) 5.5mm/0.685ct Black Diamond Ring Sale price¥128,000
【12534664掲載】スタースピネル 1.210ctルース

Star spinel 1.210ct loose Sale price¥15,800
バイカラースピネル 1.040ctルース（グレー系）

Bicolor spinel 1.040ct loose (gray/purple) Sale price¥69,800
【12534091掲載】ビルマ産レッドスピネル 0.418ctルース

Burmese red spinel 0.418ct loose Sale price¥55,800
【ダンデライオンカット】スピネル 5.7mm ルース《コラボ》（パープリッシュグレイ）ワッペン付

[Dandelion Cut] Spinel 5.7mm Loose "Collaboration" (Purplish Gray) with Patch Sale price¥39,800
レッドスピネル 0.346ctルース

Red spinel 0.346ct loose stone 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

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.