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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 May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥12,800
{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
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
《Limited to 15 stones》Synthetic Stone Gacha 💎 Includes a 1.02ct/D/VS-1/3EX certified lab-grown diamond, typically valued at 50,000 yen (plus a bonus synthetic cobalt spinel stone) 《Multi-purchase discounts available》

《Limited to 15 stones》Synthetic Stone Gacha 💎 Includes a 1.02ct/D/VS-1/3EX certified lab-grown diamond, typically valued at 50,000 yen (plus a bonus synthetic cobalt spinel stone) 《Multi-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: 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
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 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 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¥4,980
《Limited to 11 stones》Koshu Kiseki Kiriko plusthree Peridot (including lilypad) & Monsieur Saint-Jude cut peridot gacha《Multiple purchase discount available》

《Limited to 11 stones》Koshu Kiseki Kiriko plusthree Peridot (including lilypad) & Monsieur Saint-Jude cut peridot gacha《Multiple purchase discount available》 Sale price¥4,980
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 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
【Available 9/21 at 10 PM】《Limited to 11 stones》KEN-cut approx. 3mm loose gemstone gacha (Colombian mint-color emerald, spinel, zircon, etc.)《Multi-purchase discount available》

【Available 9/21 at 10 PM】《Limited to 11 stones》KEN-cut approx. 3mm loose gemstone gacha (Colombian mint-color emerald, spinel, zircon, etc.)《Multi-purchase discount available》 Sale price¥2,980
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
ペリドット 3.995ctルース

【11/2 22時販売】ペリドット 3.995ctルース（リリーパッドインクルージョン） Sale price¥22,800
ペリドット 3.858ctルース

【11/2 22時販売】ペリドット 3.858ctルース（リリーパッドインクルージョン） Sale price¥25,800
ペリドット 2.834ctルース

【11/2 22時販売】ペリドット 2.834ctルース Sale price¥19,800
ペリドット 2.977ctルース

【11/2 22時販売】ペリドット 2.977ctルース Sale price¥19,800
ピンクスピネル 0.465ctルース

Myanmar pink spinel 0.465ct loose stone Sale price¥18,800
パープルスピネル 0.434ctルース

Myanmar Purple Spinel 0.434ct Loose Stone Sale price¥12,800
パラサイティックペリドット 0.536ctルース

[Deadline: Wed, Sept 22 at 10 AM: Lottery Sale_09] Parasitic Peridot 0.536ct Loose Stone, NGL Certified Sale price¥228,000
【12565083掲載】ペリドット 3.221ctルース

【11/13 22時販売】ペリドット 3.221ctルース Sale price¥22,800
タンザニア産グレースピネル（プラチナスピネル） 0.227ctルース

【11/10 22時販売】タンザニア産グレースピネル（プラチナスピネル） 0.227ctルース Sale price¥12,800
ミャンマー産レッドスピネル 0.279ctルース

【11/7 22時販売】ミャンマー産レッドスピネル 0.279ctルース Sale price¥12,800
K18 ペリドット 合計2.40ct エメラルドカット ピアス 鑑別書付

[Item 22602847] Peridot 1.20ct / 1.20ct Earrings with Identification Report Sale price¥49,800
ビルマ産レッドスピネル 0.176ctルース

[Item No. 12564322] Burmese Red Spinel 0.176ct Loose Gemstone Sale price¥17,800
タンザニア産コバルトスピネル 0.094ctルース

[Item 12564624] Tanzanian Cobalt Spinel 0.094ct Loose Gemstone Sale price¥47,800
タンザニア産コバルトスピネル 0.100ctルース

[10/13 10:00 PM Release] Tanzanian Cobalt Spinel 2.7mm/0.100ct Loose Stone with Identification Report Sale price¥39,800
タンザニア産コバルトスピネル 0.070ctルース

[Available 10/11 at 10 PM] Tanzanian Cobalt Spinel 2.3mm/0.070ct Loose Gemstone with Identification Report Sale price¥22,800
タンザニア産コバルトスピネル 0.053ctルース

[Available 10/9, 10 PM] Tanzanian Cobalt Spinel 2.1mm / 0.053ct Loose Gemstone with Identification Report Sale price¥19,800
タンザニア産コバルトスピネル 3.6mm/0.187ctルース 日独産地鑑別

[Available 10/3 at 10 PM] Tanzanian Cobalt Spinel 3.6mm/0.187ct Loose Stone, JGL Origin Report Included Sale price¥98,000
スリランカ産スピネル 3.419ctルース

[Deadline: 9/5 (Sat) 10 AM: Lottery Sale_11] Sri Lankan Blue Spinel 3.419ct Loose Stone with Identification Report Sale price¥158,000
Pt900 スピネル 0.35ct・ダイヤモンド0.09ctペンダントトップ（ネックレストップ）鑑別書

[Item No. 22602792] [Colorify] Pt900 Spinel 0.35ct / Diamond 0.09ct Pendant Top (Necklace Top) with Appraisal Report Sale price¥39,800
ミャンマー産スターペリドット 3.644ctルース

Myanmar Star Peridot 3.644ct Loose Stone Sale price¥29,800
インドネシア産パラサイティックペリドット 0.268ctルース

[9/25 10 PM Release] Indonesian Parasitic Peridot 3.8mm/0.268ct Loose Gemstone, NGL Certified Sale price¥128,000
インドネシア産パラサイティックペリドット 0.262ctルース

【Lottery Sale_11】【For Winners Only】【Item 12560839】 Indonesian Parasitic Peridot 0.262ct Loose Stone, GGL Certified Sale price¥98,000
《Limited to 12 Stones》 Pink Spinel from Tanzania (Approx. 3x4mm, Oval Cut) 《Multiple Purchase Discount Available》

《Limited to 12 Stones》 Pink Spinel from Tanzania (Approx. 3x4mm, Oval Cut) 《Multiple Purchase Discount Available》 Sale price¥4,980
スピネル 0.725ctルース

[On sale 9/15 at 10 PM] Tanzanian Blue Spinel 0.725ct Loose Gemstone with Identification Report Sale price¥22,800
スピネル 0.449ctルース

[Available 9/15, 10 PM] Tanzanian Blue Spinel 0.449ct Loose Gemstone with Identification Report Sale price¥12,800
ビルマ産レッドスピネル 0.210ctルース 鑑別書

【Available 9/30 at 10 PM】 Burmese Red Spinel 0.210ct Loose Stone with Identification Report Sale price¥18,800
ビルマ産レッドスピネル 0.188ctルース 鑑別書

[Available 10/9 at 10 PM] Burmese Red Spinel 0.188ct Loose Gemstone with Identification Report Sale price¥18,800
ビルマ産レッドスピネル 0.146ctルース

[9/11 10 PM Sale] Burmese Red Spinel 0.146ct Loose Stone with Appraisal Report Sale price¥15,800
ビルマ産レッドスピネル 0.100ctルース

[Available 9/11 at 10 PM] Burmese Red Spinel 0.100ct Loose Stone with Identification Report Sale price¥11,000
ミャンマー産レッドスピネル 1.001ctルース

[Lottery Sale ②_202608_07] Myanmar Orange Spinel 0.855ct Loose Stone Sale price¥98,000
タンザニア産シルキーピンクスピネル 0.219ctルース

【9/7 10 PM Release】Tanzanian Silky Pink Spinel 0.219ct Loose Gemstone Sale price¥8,800
タンザニア産シルキーピンクスピネル 0.218ctルース

[On sale 9/7 at 10 PM] Tanzanian Silky Pink Spinel 0.218ct Loose Stone Sale price¥8,800
タンザニア産マヘンゲスピネル（ピンクスピネル） 0.386ctルース

[Available 9/7 at 10 PM] Mahenge Spinel (Pink Spinel) from Tanzania, 0.386ct loose stone Sale price¥15,800

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'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.