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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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Sold out {3/31 Reception ends} "PSYCHO-PASS" x KARATZ collaboration jewelry: Public Safety Bureau Criminal Investigation Division Device Image Ring, Enforcer Design [Kogami Shinya Model] {Blue Spinel}

{3/31 Reception ends} "PSYCHO-PASS" x KARATZ collaboration jewelry: Public Safety Bureau Criminal Investigation Division Device Image Ring, Enforcer Design [Kogami Shinya Model] {Blue Spinel}

Sold out 【8月誕生石】ペリドット原石・ルース2石セット - カラッツSTORE

[August birthstone] Peridot raw stone/loose 2 stone set《Multiple purchase discount available》

Sold out ベトナム産コバルトスピネル原石 1石

1 stone cobalt spinel rough from Vietnam《Discount available for multiple purchases》

Sold out ジェムガチャ💎サンジェ氏カットのスリランカ産スピネル1石ルース《複数購入割引有り》

Gem Gacha💎Sanjay cut Sri Lankan spinel 1 stone loose

Sold out Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for advanced users: rough spinel from Mozambique)

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for advanced users: rough spinel from Mozambique)

Sold out Pakistani Ludwigite in Peridot 1 stone (August birthstone) {Multiple purchase discounts available}

Pakistani Ludwigite in Peridot 1 stone (August birthstone) {Multiple purchase discounts available}
Sold out パープルピンクスピネル 1石《オッカムピティア鉱山》（平均0.55ct)

Purple Pink Spinel 1 stone 《Ockhampitia Mine》 (Average 0.55ct)

Sold out Hot Pink Spinel 《Ayana Spinel》2 stone set (round cut/marquise cut)

Hot Pink Spinel 《Ayana Spinel》2 stone set (round cut/marquise cut)

Sold out ベトナム産コバルトスピネル1石ルース

Limited to 11 stones: 1 loose cobalt spinel stone from Vietnam (special offer, round cut) Multiple purchase discounts available

Sold out Limited to 11 stones: 1 loose pink spinel from Mahenge, Tanzania (trillion cut, 2.5mm) Discounts for multiple purchases

Limited to 11 stones: 1 loose pink spinel from Mahenge, Tanzania (trillion cut, 2.5mm) Discounts for multiple purchases
Sold out 【KEN氏】ビルマ産スピネル1石ルース - カラッツSTORE

[Mr. KEN] 1 stone loose spinel from Burma

Sold out Tanzanian cobalt spinel 1 stone loose (1.3-1.4mm round cut) {Multiple purchase discount available}

Tanzanian cobalt spinel 1 stone loose (1.3-1.4mm round cut) {Multiple purchase discount available}
Sold out 『8月誕生石』ペリドット1石ルース（フロスト加工）《複数購入割引有》

"August birthstone" Peridot 1 stone loose (frosted)《Multiple purchase discount available》

Sold out Almandine garnet, sky blue topaz, peridot 3 stone set loose (rose cut, 5mm)《Multiple purchase discount available》

Almandine garnet, sky blue topaz, peridot 3 stone set loose (rose cut, 5mm)《Multiple purchase discount available》
Sold out 【KEN氏】アリゾナ産ペリドット 1石 - カラッツSTORE

[Mr. KEN] Arizona peridot 1 stone loose (August birthstone)《Multiple purchase discount available》

Sold out Limited to 3 stones: 1 peridot green diamond loose stone (treated, 3mm, VS class, Chuho sorting) Multiple purchase discounts available

Limited to 3 stones: 1 peridot green diamond loose stone (treated, 3mm, VS class, Chuho sorting) Multiple purchase discounts available
Sold out Limited to 8 stones: 1 loose Mahenge spinel from Tanzania (hot pink spinel, 2.0mm) Multiple purchase discounts available

Limited to 8 stones: 1 loose Mahenge spinel from Tanzania (hot pink spinel, 2.0mm) Multiple purchase discounts available

Sold out 【KEN氏】ビルマ産スピネル2石セット 0.540ctルース（プリンセスカット） - カラッツSTORE

[Mr. KEN] Burmese spinel 2 stone set 0.540ct loose (princess cut)

Sold out 【12525799掲載】ブラックスピネル 1.880ctルース

Black spinel 1.88ct loose

Sold out スピネル 1石（3.8mm,プリンセスカット） - KARATZ STORE｜カラッツSTORE

Spinel 1 stone (3.8mm, princess cut)

Sold out Tanzanian Mahenge Spinel 2-stone loose set (hot pink spinel, 1.8mm) {Multiple purchase discount available}

Tanzanian Mahenge Spinel 2-stone loose set (hot pink spinel, 1.8mm) {Multiple purchase discount available}
Sold out K18ミャンマー産レッドスピネル0.59ct・ピンクダイヤモンド ペンダントトップ（ネックレストップ）

K18 Myanmar red spinel 0.59ct pink diamond pendant (necklace)
Sold out Madagascar gray spinel (green fluorescent type) 1 loose stone {Multiple purchase discounts available}

Madagascar gray spinel (green fluorescent type) 1 loose stone {Multiple purchase discounts available}
Sold out コバルトスピネル 0.135ctルース

Tanzanian Cobalt Spinel 3.1mm/0.135ct Loose Stone Japan-Germany
Sold out ピンクスピネル 0.441ctルース

Pink spinel 0.441ct loose stone
Sold out スピネル 0.393ctルース

Spinel 0.393ct loose stone
Sold out パープルスピネル 0.364ctルース

Purple spinel 0.364ct loose stone
Sold out ミャンマー産レッドスピネル 0.348ctルース

Myanmar Red Spinel 0.348ct Loose
Sold out Tanzania color change spinel 0.197ct loose stone

Tanzania color change spinel 0.197ct loose stone
Sold out ピンクスピネル 0.275ctルース

[Mr. KEN] Pink spinel 0.275ct loose stone
Sold out アメリカ産ペリドット 0.238ctルース

American Peridot 0.238ct Loose Stone
Sold out ミャンマー産グレースピネル（プラチナスピネル） 0.669ctルース

Myanmar gray spinel (platinum spinel) 0.669ct loose stone
Sold out K18 Myanmar spinel 0.37ct earrings

K18 Myanmar spinel 0.37ct earrings
Sold out パラサイティックペリドット 0.528ctルース

Parasite Peridot (Parasitetic Peridot) 0.528ct Loose Stone
Sold out Orange spinel 0.116ct loose

Orange spinel 0.116ct loose
Sold out オレンジスピネル 0.221ctルース

Orange spinel 0.221ct loose
Sold out Hot pink spinel 0.086ct loose

Hot pink spinel 0.086ct loose
Sold out Gray spinel (platinum spinel) 0.405ct loose

Gray spinel (platinum spinel) 0.405ct loose
Sold out Red spinel 0.433ct loose

Red spinel 0.433ct loose
Sold out ペリドット 0.798ctルース

[Koshu precious stone Kiriko plusthree] Peridot 6mm/0.798ct《Aya》 Loose with emblem
Sold out ピンクスピネル 0.394ctルース

Silky pink spinel 0.394ct loose
Sold out グレースピネル（プラチナスピネル） 0.376ctルース

[Mr. Sanjay] Gray Spinel (Platinum Spinel) 0.376ct Loose
Sold out Peridot green diamond (treatment) 0.071ct loose (equivalent to VS class)

Peridot green diamond (treatment) 0.071ct loose (equivalent to VS class)
Sold out ルードヴィッヒアイトインペリドット 0.661ctルース

Ludwigite imperidot 0.661ct loose
Sold out スリランカ産コバルトスピネル 0.647ctルース

Cobalt spinel from Sri Lanka 0.647ct loose Japanese German edition
Sold out ヴァイオレットスピネル 0.238ctルース

[Mr. Sanjay] Violet spinel 3.5mm/0.238ct loose
Sold out スピネル 0.652ctルース

Spinel 0.652ct loose

Sold out Paracytic peridot 2mm/0.028ct loose

Paracytic peridot 2mm/0.028ct loose

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