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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
タンザニア産レッドスピネル 0.291ctルース

[#202607 Akihabara Pop-up Store - Currently out on loan] [Listed as 12563392] Tanzanian Red Spinel 0.291ct Loose Stone Sale price¥35,800
タンザニア産パープルスピネル 0.427ctルース

[Lottery Sale 0725_03] Tanzania Purple Spinel 0.427ct Loose Stone with Certificate Sale price¥29,800
パキスタン産ルードヴィッヒアイトインペリドット 1.624ctルース

【#202607 Akihabara Pop-up Items Out for Display】【12555648 Posted】Ludwigite in Peridot from Pakistan 1.624ct Loose Sale price¥9,800
coming soon 【12564052掲載】ビルマ産レッドスピネル 0.236ctルース

[Listed as 12564052] Burmese Red Spinel 0.236ct Loose Sale price¥45,800
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
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
{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
[Sale from 10 PM on June 28] [Limited to 15 Stones] Synthetic Gem Gacha 💎 Includes a 1.02ct/D/VS1/3EX certified lab-grown diamond, normally priced at 50,000 yen (with a bonus synthetic cobalt spinel) [Bulk purchase discount available]

[Sale from 10 PM on June 28] [Limited to 15 Stones] Synthetic Gem Gacha 💎 Includes a 1.02ct/D/VS1/3EX certified lab-grown diamond, normally priced at 50,000 yen (with a bonus synthetic cobalt spinel) [Bulk purchase discount available] Sale price¥5,980
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
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
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 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
Sold out Limited to 10 stones! Spinel Gacha: 1 loose stone including a 1.17ct bicolor spinel. Multiple purchase discounts available.

Limited to 10 stones! Spinel Gacha: 1 loose stone including a 1.17ct bicolor spinel. Multiple purchase discounts available.
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
Gem Gacha💎 Custom cut spinel《August birthstone》《Multiple purchase discounts available》

Gem Gacha💎 Custom cut spinel《August birthstone》《Multiple purchase discounts available》 Sale price¥3,980
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 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
Myanmar Red Spinel (Pear Shape, approx. 4x3mm) - Only 1 Stone Left! - Multi-Purchase Discount Available

Myanmar Red Spinel (Pear Shape, approx. 4x3mm) - Only 1 Stone Left! - Multi-Purchase Discount Available Sale price¥9,800
[Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available

[Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available Sale price¥9,800
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
Sold out Limited to 4 stones: 1 loose spinel stone from Sri Lanka. Discounts available for multiple purchases.

Limited to 4 stones: 1 loose spinel stone from Sri Lanka. Discounts available for multiple purchases.
タンザニア産アヤナスピネル（ホットピンクスピネル） 0.182ctルース 鑑別書

[On sale August 2 at 10 PM JST] Tanzanian Ayana spinel (hot pink spinel) 0.182 ct loose stone with gemological report Sale price¥25,800
タンザニア産アヤナスピネル（ホットピンクスピネル）3.0mm/ 0.107ctルース

[Sale on 7/22 at 10 PM] Tanzanian Ayana Spinel (Hot Pink Spinel) 3.0mm/ 0.107ct Loose Stone Sale price¥18,800
[On sale July 20th at 10 PM JST] Tanzanian Pink Spinel (approx. 3x4mm, oval cut) - Limited to 12 stones. Multiple purchase discount available.

[On sale July 20th at 10 PM JST] Tanzanian Pink Spinel (approx. 3x4mm, oval cut) - Limited to 12 stones. Multiple purchase discount available. Sale price¥5,980
ミャンマー産レッドスピネル 0.229ctルース 鑑別書

[Sales start July 15th at 10 PM] Myanmar Red Spinel 0.229ct Loose Stone with Gemstone Report Sale price¥45,800
タンザニア産ピンクスピネル 0.148ctルース

[Posted on 12563395] Tanzanian Pink Spinel 0.148ct Loose Gemstone Sale price¥22,800
タンザニア産マヘンゲスピネル（ピンクスピネル） 0.566ctルース

Tanzanian Mahenge Spinel (Pink Spinel) 0.566ct Loose Stone with Certification Sale price¥55,800
タンザニア産マヘンゲスピネル（ピンクスピネル） 0.333ctルース

[On Sale July 10 at 10 PM JST] Tanzanian Mahenge Spinel (Pink Spinel) 0.333ct Loose Stone with Gemological Report Sale price¥29,800
タンザニア産ピンクスピネル 0.246ctルース

[Sale on 7/1 at 10 PM] Tanzanian Pink Spinel 3.9mm/0.246ct Loose Stone with Certification Sale price¥35,800
スリランカ産コバルトスピネル 0.281ctルース

Sri Lankan cobalt spinel 0.281ct loose stone Sale price¥55,800
ミャンマー産ブラックスピネル 3.061ctルース

[On Sale June 23rd at 10 PM] Myanmar Black Spinel 3.061ct Loose Stone with Gemstone Identification Report Sale price¥15,800
ミャンマー産レッドスピネル 0.453ctルース

[Sale June 16th, 10 PM] Myanmar Red Spinel 0.453ct Loose Stone Sale price¥19,800
ミャンマー産レッドスピネル 0.172ctルース

[Sale starts June 16th at 10 PM] Myanmar Red Spinel 3.3mm/0.172ct Loose Stone Sale price¥8,800
ミャンマー産レッドスピネル 0.214ctルース

[Sales start 10 PM on June 16] Myanmar Red Spinel 3.5mm/0.214ct Loose Gemstone Sale price¥9,800
ミャンマー産レッドスピネル 0.194ctルース

[On sale June 14th at 10 PM] Myanmar Red Spinel 3.4mm/0.194ct Loose Stone Sale price¥9,800
ミャンマー産レッドスピネル 0.234ctルース

[Sale starts June 16th, 10 PM JST] Myanmar Red Spinel 0.234ct Loose Gemstone Sale price¥12,800
ミャンマー産レッドスピネル 0.249ctルース

[On Sale June 16, 10 PM] Loose 0.249ct Myanmar Red Spinel Sale price¥12,800
ミャンマー産ヴァイオレットスピネル 0.426ctルース

Myanmar Violet Spinel 0.426ct Loose Sale price¥8,800
[KEN] Pink spinel from Myanmar 0.604ct loose

[KEN] Pink spinel from Myanmar 0.604ct loose Sale price¥9,800
ピンクスピネル 0.713ctルース

Pink spinel 0.713ct loose stone Sale price¥8,800
スタースピネル 2.030ctルース

Myanmar Star Spinel 2.030ct Loose Sale price¥69,800
Mozambique pink spinel 0.670ct loose stone

Mozambique pink spinel 0.670ct loose stone Sale price¥22,800

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.