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diamond

Diamond is the birthstone of April. This gemstone is sometimes called the king of gemstones. It is said to be the hardest gemstone on earth, and its strong shine is exceptionally beautiful. Colorless is the most common, but it comes in a variety of shades including yellow, pink, blue, orange, and green.

Karatz GemMagazine
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ダイヤモンド 0.245ctルース(E, VS-1)

【6/14 22時販売】ダイヤモンド 0.245ctルース(E, VS-1,オクタゴン・ブリリアントカット) Sale price¥39,800
ブルーダイヤモンド（トリートメント） 0.139ctルース(Fancy Greenish Blue, SI1)

【6/12 22時販売】アイスブルーダイヤモンド（トリートメント） 3.2mm/0.139ctルース(Fancy Greenish Blue, SI1) Sale price¥22,800
ブルーダイヤモンド（トリートメント） 0.095ctルース(Fancy Greenish Blue, SI1)

【6/12 22時販売】アイスブルーダイヤモンド（トリートメント） 2.8mm/0.095ctルース(Fancy Greenish Blue, SI1) Sale price¥19,800
フォレストグリーンダイヤモンド（トリートメント） 0.431ctルース(FANCY DARK GRAY GREEN, SI-2)

【6/11 22時販売】フォレストグリーンダイヤモンド（トリートメント） 0.431ctルース(FANCY DARK GRAY GREEN, SI-2) Sale price¥35,800
フォレストグリーンダイヤモンド（トリートメント） 0.326ctルース(FANCY DARK GRAY GREEN, SI-2)

【6/11 22時販売】フォレストグリーンダイヤモンド（トリートメント） 0.326ctルース(FANCY DARK GRAY GREEN, SI-2) Sale price¥29,800
インターナリーダイヤモンド 0.25ルース(E, IF, 3Excellent) GIA

[On sale at 22:00 on 6/8] Internal Diamond 0.25 Loose (E, IF, 3Excellent) GIA Sale price¥69,800
ダイヤモンド（カボションカット） 0.401ctルース

[On sale at 10pm on June 8th] Diamond (cabochon cut) 0.401ct loose (star depending on the angle) Sale price¥49,800
ダイヤモンド 0.131ctルース(G, VS-1, EXCELLENT ハート＆キューピッド)

[On sale from 10pm on 5/18] Diamond 3.3mm/0.131ct loose stone (G, VS-1, EXCELLENT Heart & Cupid) Sale price¥25,800
ダイヤモンド 0.330ct原石

[On sale from 10pm on 5/18] South African diamond 0.330ct rough stone Sale price¥5,980
H&C（ハート&キューピッド）専用スコープ（ダイヤモンド 専用スコープ) - カラッツSTORE

[Jeweler's Tools] H&C (Heart & Cupid) Special Scope (Diamond Special Scope) Sale price¥1,580
Ice blue diamond 1.2mm or 2.0mm 1 stone (VS class equivalent, round cut) {Multiple purchase discount available}

Ice blue diamond 1.2mm or 2.0mm 1 stone (VS class equivalent, round cut) {Multiple purchase discount available} Sale priceFrom ¥4,980
H&C (Heart & Cupid) Diamond 2.0mm Loose (VS Class, DG Class, 2mm Melee Diamonds) {Multiple Purchase Discounts Available}

H&C (Heart & Cupid) Diamond 2.0mm Loose (VS Class, DG Class, 2mm Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥7,980
Rose cut diamond 1.2mm x 1 stone (VS-SI class, DH color, melee diamonds) {Multiple purchase discounts available}

Rose cut diamond 1.2mm x 1 stone (VS-SI class, DH color, melee diamonds) {Multiple purchase discounts available} Sale price¥2,980
H&C (Hearts & Cupids) Diamond 1.2mm Loose (VS Class, DG Class, Melee Diamonds) {Multiple Purchase Discounts Available}

H&C (Hearts & Cupids) Diamond 1.2mm Loose (VS Class, DG Class, Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥3,980
Diamond 1.2mm (VS class, DG color, round cut, melee diamond) 1 loose stone {Multiple purchase discounts available}

Diamond 1.2mm (VS class, DG color, round cut, melee diamond) 1 loose stone {Multiple purchase discounts available} Sale price¥1,980
Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available}

Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available} Sale price¥1,580
グリーンダイヤモンド（トリートメント）1石（約1.3mm)

Green Diamond (Treatment) 1 stone (approx. 1.3mm)《Multiple purchase discount available》 Sale price¥3,580
1 blue fluorescent diamond (H&C, 3EX, VS-SI class equivalent, 2.0mm) {Multiple purchase discount available}

1 blue fluorescent diamond (H&C, 3EX, VS-SI class equivalent, 2.0mm) {Multiple purchase discount available} Sale price¥8,980
[On sale from 10pm on 12/7] {Limited to 40 stones} Salt and pepper diamond (2mm, melee diamond) 1 loose stone {Multiple purchase discounts available}

[On sale from 10pm on 12/7] {Limited to 40 stones} Salt and pepper diamond (2mm, melee diamond) 1 loose stone {Multiple purchase discounts available} Sale price¥2,980
プリンセスカットダイヤモンド 2.0mm ルース（VSクラス相当）

Princess cut diamond 2.0mm loose (equivalent to VS class)《Multiple purchase discount available》 Sale price¥8,800
H&C(ハート&キューピッド)ダイヤモンド1.2mmルース - カラッツSTORE

H&C (Hearts & Cupids) Diamond 1.5mm Loose (VS Class, DG Class, Melee Diamonds) {Multiple Purchase Discounts Available} Sale price¥4,980
カナリーイエローダイヤモンド1石ルース（VS-SI）《複数購入割引有》

《Limited to 18 stones》Canary yellow diamond 1 stone loose (VS-SI)《Multiple purchase discount available》 Sale price¥5,980
Gem Gacha "April Birthstone" 💎 Fluorescent Yellow Diamond (Tapered Cut or Baguette Cut) 1 Stone {Multiple Purchase Discounts Available}

Gem Gacha "April Birthstone" 💎 Fluorescent Yellow Diamond (Tapered Cut or Baguette Cut) 1 Stone {Multiple Purchase Discounts Available} Sale price¥3,980
Diamond (Old Mine Cut) 1 Loose Stone {Multiple Purchase Discounts Available}

Diamond (Old Mine Cut) 1 Loose Stone {Multiple Purchase Discounts Available} Sale price¥4,980
Limited to 10 stones: 1 London blue diamond loose (VS-SI class equivalent, 1.8mm) Multiple purchase discounts available

Limited to 10 stones: 1 London blue diamond loose (VS-SI class equivalent, 1.8mm) Multiple purchase discounts available Sale price¥1,980
Limited to 12 pieces Diamond Gacha💎London Blue Diamond 1 loose stone (VS class equivalent, 2.0~3.2mm) Multiple purchase discounts available

Limited to 12 pieces Diamond Gacha💎London Blue Diamond 1 loose stone (VS class equivalent, 2.0~3.2mm) Multiple purchase discounts available Sale price¥5,980
Diamond loose sorting transition fee

Diamond loose sorting transition fee Sale price¥3,000
[On sale at 10pm on 4/12] {Limited to 9 sets} Diamond Gacha💎 Yellow Diamond Rough Stone and 2 Loose Stone Set {Multiple Purchase Discounts Available}

[On sale at 10pm on 4/12] {Limited to 9 sets} Diamond Gacha💎 Yellow Diamond Rough Stone and 2 Loose Stone Set {Multiple Purchase Discounts Available} Sale price¥2,980
[On sale from 10pm on 5/17] {Limited to 9 stones} Gem gacha💎 April birthstone gacha: A gacha where you can win a fan-cut diamond with AGT sorting or a morganite {Multiple purchase discounts available}

[On sale from 10pm on 5/17] {Limited to 9 stones} Gem gacha💎 April birthstone gacha: A gacha where you can win a fan-cut diamond with AGT sorting or a morganite {Multiple purchase discounts available} Sale price¥3,980
ブラウンダイヤモンド 0.389ctルース

[12555780] Brown diamond 0.389ct loose stone Sale price¥39,800
ダイヤモンド原石（ソーヤブル） 0.103ct原石

[On sale from 10pm on 5/18] South African diamond rough (sawable) 0.103ct rough (with trigons) Sale price¥24,800
ダイヤモンド 0.210ct原石

[On sale from 10pm on 5/9] South African diamond 0.210ct rough stone Sale price¥8,800
ダイヤモンド原石（メイカブル） 0.284ctルース

[On sale from 22:00 on 5/6] South African diamond rough (makeable) 0.284ct loose (equivalent to VS-SI class) Sale price¥25,800
ダイヤモンド 0.334ctルース(F, SI1)

[On sale from 10pm on 5/5] Diamond 0.334ct loose stone (F, SI1) Sale price¥49,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.107ct原石

[On sale from 22:00 on 5/5] South African diamond rough (sawable) 0.107ct rough Trigon Sale price¥42,800
ミントグリーンダイヤモンド（トリートメント） 0.172ctルース（VSクラス相当,テーパードカット）

[On sale from 10pm on 5/4] Mint green diamond (treated) 0.172ct loose (VS class equivalent, tapered cut) Sale price¥29,800
[On sale from 10pm on 4/29] Diamond 3.2mm/0.129ct loose stone (F, SI-1, EXCELLENT)

[On sale from 10pm on 4/29] Diamond 3.2mm/0.129ct loose stone (F, SI-1, EXCELLENT) Sale price¥25,800
K18YG カメレオンダイヤモンド 0.142ct リング

[On sale from 10pm on 4/25] K18YG Chameleon Diamond 3.2mm/0.142ct Ring (SI-2, FANCY BROWNISH GREENISH YELLOW) Sale price¥98,000
[On sale from 10pm on 4/22] Diamond 0.169ct loose stone (F, VS2)

[On sale from 10pm on 4/22] Diamond 0.169ct loose stone (F, VS2) Sale price¥18,800
Limited to 24 stones: Rough diamonds from South Africa (yellow fluorescent, orange fluorescent, green fluorescent) Discounts available for multiple purchases

Limited to 24 stones: Rough diamonds from South Africa (yellow fluorescent, orange fluorescent, green fluorescent) Discounts available for multiple purchases Sale price¥2,980
イエローダイヤモンド 0.390ctルース(UNDER S(LIGHT YELLOW), VVS1, 3Excellent H&C)

Yellow Diamond 4.7mm/0.390ct Loose (LIGHT YELLOW, VVS1, 3Excellent H&C) Sale price¥49,800
アイスブルーダイヤモンド（トリートメント） 3.2mm/0.127ctルース(LIGHT BLUE, VS2)

Ice Blue Diamond (Treatment) 3.2mm/0.127ct Loose (LIGHT BLUE, VS2) Sale price¥25,800
シルキーダイヤモンド 2.7mm/0.086ctルース

Silky diamond 2.7mm/0.086ct loose Sale price¥14,800
ブラウンダイヤモンド 0.554ctルース (カボションカット,SIクラス相当)

Brown diamond 0.554ct loose (cabochon cut, SI class equivalent) Sale price¥69,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.083ct原石

South African diamond rough (sawable) 0.083ct rough Sale price¥32,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.102ct原石

South African diamond rough (sawable) 0.102ct rough (with trigon) Sale price¥45,800
南アフリカ産ダイヤモンド原石（ソーヤブル） 0.087ct原石

South African diamond rough (sawable) 0.087ct rough Sale price¥34,800
イエローダイヤモンド 0.551ctルース

Yellow Diamond 0.551ct Loose (Cabochon Cut) Sale price¥49,800

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.

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