Login

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
[On sale from 10pm on 4/5] Myanmar gray spinel, platinum spinel (2mm, round cut) 1 loose stone {Multiple purchase discounts available}

[On sale from 10pm on 4/5] Myanmar gray spinel, platinum spinel (2mm, round cut) 1 loose stone {Multiple purchase discounts available} Sale price¥5,980
[On sale from 10pm on 4/5] Limited to 13 stones, 1 red spinel rough stone from Myanmar [Multiple purchase discounts available]

[On sale from 10pm on 4/5] Limited to 13 stones, 1 red spinel rough stone from Myanmar [Multiple purchase discounts available] Sale price¥6,980
パラサイティックペリドット 0.037ルース

[On sale at 22:00 on 4/12] Parasitic Peridot 2.0mm/0.037 Loose Sale price¥19,800
[On sale from 10pm on 4/5] Limited to 8 stones, 1 red spinel rough stone from Myanmar [Multiple purchase discounts available]

[On sale from 10pm on 4/5] Limited to 8 stones, 1 red spinel rough stone from Myanmar [Multiple purchase discounts available] Sale price¥5,980
ミャンマー産スターペリドット 2.678ctルース

[On sale at 22:00 on 4/5] Myanmar Star Peridot 2.678ct Loose Sale price¥29,800
ミャンマー産スターペリドット 3.644ctルース

[On sale at 22:00 on 4/5] Myanmar Star Peridot 3.644ct Loose Stone Sale price¥39,800
レッドスピネル 0.466ct原石

[On sale at 22:00 on 4/6] Myanmar red spinel rough stone 0.466ct Sale price¥18,800
レッドスピネル 0.368ct原石

[On sale at 22:00 on 4/6] Myanmar red spinel 0.368ct rough Sale price¥9,800
レッドスピネル 原石

[On sale at 22:00 on 4/6] Myanmar red spinel 0.272ct rough stone Sale price¥11,000
レッドスピネル 原石

[On sale at 22:00 on 4/6] Myanmar red spinel 0.271ct rough stone Sale price¥12,800
レッドスピネル 原石

[On sale at 22:00 on 4/6] Myanmar red spinel 0.236ct rough Sale price¥9,800
ミャンマー産レッドスピネル 0.218ct原石

[On sale at 22:00 on 4/5] Myanmar red spinel 0.218ct rough Sale price¥8,800
ベトナム産コバルトスピネル 0.331ct原石

[On sale 4/4 at 10pm] Vietnam Cobalt Spinel 0.331ct Rough Stone Sale price¥19,800
ベトナム産コバルトスピネル 0.154ct原石

[On sale 4/4 at 10pm] Vietnam Cobalt Spinel 0.154ct Rough Stone Sale price¥12,800
ベトナム産コバルトスピネル 0.142ct原石

[On sale at 22:00 on 4/4] Vietnam-made cobalt spinel 0.142ct rough stone Sale price¥15,800
ベトナム産コバルトスピネル 0.091ct原石

[On sale at 22:00 on 4/4] Vietnam Cobalt Spinel 0.091ct Rough Stone Sale price¥8,800
ベトナム産コバルトスピネル 0.088ct原石

[On sale 4/4 at 10pm] Vietnam Cobalt Spinel 0.088ct Rough Stone Sale price¥8,800
ベトナム産コバルトスピネル 0.085ct原石

[On sale from 22:00 on 4/2] Vietnam-made cobalt spinel 0.085ct rough stone (color shift) Sale price¥5,980
ベトナム産コバルトスピネル 0.078ct原石

[On sale 4/4 at 10pm] Vietnam Cobalt Spinel 0.078ct Rough Stone Sale price¥8,800
ベトナム産コバルトスピネル 0.075ct原石（カラーシフト）

[On sale from 22:00 on 4/2] Vietnam-made cobalt spinel 0.075ct rough stone (color shift) Sale price¥5,980
ベトナム産コバルトスピネル（カラーチェンジ） 0.082ctルース

[On sale at 22:00 on 4/5] Vietnam Cobalt Spinel (Color Change) 2.7mm/0.082ct Loose Stone, Nikkei Kan Sale price¥59,800
[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
Red spinel rough stone 1 stone (raspberry color)《Discount available for multiple purchases》

Red spinel rough stone 1 stone (raspberry color)《Discount available for multiple purchases》 Sale priceFrom ¥3,980
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
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
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
{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
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
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 spinel stone from Myanmar (pentagonal cut, 3-3.5mm) Multiple purchase discounts available

Limited to 6 stones: 1 loose spinel stone from Myanmar (pentagonal cut, 3-3.5mm) Multiple purchase discounts available Sale price¥2,580
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 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
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 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
スピネル 0.451ctルース

[On sale at 22:00 on 4/6] Blue spinel 0.451ct loose stone Sale price¥18,800
パラサイティックペリドット 0.042ルース

[On sale 3/25 at 10pm] Parasite Peridot (Parasitetic Peridot) 2.1mm/0.042ct Loose Stone Sale price¥18,800
インドネシア産パラサイティックペリドット 0.172ctルース

[On sale at 22:00 on 3/29] Parasite Peridot (Parasitetic Peridot) 0.172ct Loose Stone Sale price¥98,000
スリランカ産スピネル 0.763ctルース

[On sale 3/8 at 22:00] Sri Lankan spinel 0.763ct loose stone Sale price¥12,800
スリランカ産スピネル 0.153ctルース

[On sale 3/9 at 22:00] Sri Lankan blue spinel 0.153ct loose stone Sale price¥8,800
スリランカ産スピネル 0.584ctルース

[On sale 3/12 at 22:00] Sri Lankan blue spinel 0.584ct loose stone Sale price¥12,800
Pt950スリランカ産パープルスピネル 0.29ct・ダイヤモンドリング

[On sale 3/8 at 22:00] Pt950 Sri Lankan purple spinel 0.29ct diamond ring Sale price¥69,800
パープルスピネル 0.311ctルース

[On sale 3/2 at 22:00] Myanmar purple spinel 0.311ct loose stone Sale price¥8,800
スリランカ産ブルースピネル 0.519ctルース

[On sale at 10pm on 2/22] Sri Lankan Blue Spinel 0.519ct Loose Sale price¥12,800
タンザニア産ピンクスピネル 0.487ctルース

[On sale at 22:00 on 2/10] 0.487ct loose orange pink spinel from Tanzania Sale price¥12,800
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

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.

KARATZ・Five Commitments