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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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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
Lab-Grown Diamond (Synthetic Diamond) [HPHT Method] Single Loose Stone (2.0mm, 2.2mm, 2.4mm, 2.6mm) [Multiple Purchase Discounts Available]

Lab-Grown Diamond (Synthetic Diamond) [HPHT Method] Single Loose Stone (2.0mm, 2.2mm, 2.4mm, 2.6mm) [Multiple Purchase Discounts Available] Sale priceFrom ¥1,580
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
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
[Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire

[Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire Sale price¥3,980
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
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
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 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
[On sale July 20th at 10 PM] "Limited to 13 Stones" Diamond Gacha: Win a FANCY VIVID Yellow Diamond (with sorting report) worth 22,800 yen. One loose stone. (Multiple purchase discount available.)

[On sale July 20th at 10 PM] "Limited to 13 Stones" Diamond Gacha: Win a FANCY VIVID Yellow Diamond (with sorting report) worth 22,800 yen. One loose stone. (Multiple purchase discount available.) Sale price¥2,580
[Available 8/23 at 10 PM] 《13 Sets Only》 Diamond Gacha featuring a set of 2 raw and cut diamonds, including a 0.2ct VS grade diamond 《Multi-purchase discounts available》

[Available 8/23 at 10 PM] 《13 Sets Only》 Diamond Gacha featuring a set of 2 raw and cut diamonds, including a 0.2ct VS grade diamond 《Multi-purchase discounts available》 Sale price¥3,980
"Limited to 14 stones" Fluorescent diamonds in rare colors such as white, orange, and green "Bulk purchase discounts available"

"Limited to 14 stones" Fluorescent diamonds in rare colors such as white, orange, and green "Bulk purchase discounts available" Sale price¥3,980
[Available Oct 9, 10 PM] 《Limited Quantity》 Cabochon-cut lab-grown diamond loose stone (1 piece, CVD/2.1-2.3mm) 《Multi-buy discount available》

[Available Oct 9, 10 PM] 《Limited Quantity》 Cabochon-cut lab-grown diamond loose stone (1 piece, CVD/2.1-2.3mm) 《Multi-buy discount available》 Sale priceFrom ¥4,580
Diamond loose sorting transition fee

Diamond loose sorting transition fee Sale price¥3,000
【9/7 10:00 PM Sale】《Limited to 10 Stones》Diamond Gacha with a Chance to Win a Certified Diamond (All stones VS class or equivalent)《Multi-purchase discounts available》

【9/7 10:00 PM Sale】《Limited to 10 Stones》Diamond Gacha with a Chance to Win a Certified Diamond (All stones VS class or equivalent)《Multi-purchase discounts available》 Sale price¥3,980
《Limited to 5 stones》Fluorescent brown diamond single loose stone (pear shape, SI clarity equivalent, 0.2ct UP) 《Bulk purchase discount available》

《Limited to 5 stones》Fluorescent brown diamond single loose stone (pear shape, SI clarity equivalent, 0.2ct UP) 《Bulk purchase discount available》 Sale price¥4,980
《Limited to 10 Stones》Diamond Gacha💎 with Gemstone Sorting (0.136ct/E/VVS-2/EXCELLENT/NONE (Heart & Cupid)) up for grabs 《Multiple purchase discount available》

《Limited to 10 Stones》Diamond Gacha💎 with Gemstone Sorting (0.136ct/E/VVS-2/EXCELLENT/NONE (Heart & Cupid)) up for grabs 《Multiple purchase discount available》 Sale price¥3,980
Pink Diamond Loot Box💎 Fancy Orange Pink 0.188ct and other Fancy-colored pink diamonds (all stones sorted or certified) 《Multiple purchase discounts available》

Pink Diamond Loot Box💎 Fancy Orange Pink 0.188ct and other Fancy-colored pink diamonds (all stones sorted or certified) 《Multiple purchase discounts available》 Sale price¥11,000
[On sale August 12th at 10 PM] "Limited to 15 Stones" Diamond Gacha featuring rare butterfly-cut diamonds "Multiple Purchase Discount Available"

[On sale August 12th at 10 PM] "Limited to 15 Stones" Diamond Gacha featuring rare butterfly-cut diamonds "Multiple Purchase Discount Available" Sale price¥5,980
13-stone diamond half eternity ring set (VS class, D-G color, H&C, 2.0mm)

13-stone diamond half eternity ring set (VS class, D-G color, H&C, 2.0mm) Sale price¥158,000
《Limited to 2 Stones》Brown Diamond (4mm/0.3ct, with Certificate of Authenticity)《Multiple Purchase Discount Available》

《Limited to 2 Stones》Brown Diamond (4mm/0.3ct, with Certificate of Authenticity)《Multiple Purchase Discount Available》 Sale price¥5,980
[Option] Laser engraving of characters and symbols

[Option] Laser engraving of characters and symbols Sale price¥5,000
イエローダイヤモンド 0.188ctルース(FANCY INTENSE YELLOW, VS1)

Yellow diamond 0.188ct loose (FANCY INTENSE YELLOW, VS1) Sale price¥47,800
Pt900/Pt850 ブラックダイヤモンド0.70ct・ダイヤモンド0.53ctペンダント（ネックレス）鑑別書

[Item 22602733] [Colorfully] Pt900/Pt850 Black Diamond and Diamond 0.53ct Pendant (Necklace) with Identification Report Sale price¥98,000
Pt900 ルベライト1.308ct・ダイヤモンド0.54ctリング 鑑別書

[Posted on 22602707] [Colorful] Pt900 Rubellite 1.308ct Ring Sale price¥158,000
K18WG ダイヤモンド ティアドロップ ペンダント（ネックレス）

[Item 22602808] [Colori] K18WG Diamond Pendant (Necklace) Sale price¥148,000
K18/K18WG イエローダイヤモンド0.30ct ダイヤモンド0.26ct ペンダント（ネックレス）

[Item No. 22602806] [Colorify] K18/K18WG 0.3ct Diamond and 0.26ct Diamond Pendant (Necklace) Sale price¥158,000
K18WG ダイヤモンド 0.5ct クロスモチーフ ペンダントトップ（ネックレストップ）

[Posted on 22602705] [Colorful] K18WG Diamond 0.5ct Pendant Top (Necklace Top) Sale price¥35,800
K18 揺れるダイヤモンド 0.211ct ダイヤモンド0.35ct ペンダント（ネックレス）

[Item 22602804][Colori] K18 0.211ct Diamond & 0.35ct Diamond Pendant (Necklace) Sale price¥158,000
[Available Oct 9, 10:00 PM] &lt;<limited quantity>&gt; Lab-Grown Diamond Cabochon Loose Stone (1pc) (CVD / 2.4-2.7mm) &lt;<multi-purchase discount available>&gt;</multi-purchase></limited>

[Available Oct 9, 10:00 PM] <> Lab-Grown Diamond Cabochon Loose Stone (1pc) (CVD / 2.4-2.7mm) <> Sale priceFrom ¥5,280
インターナリーフローレスダイヤモンド（H&C） 4.2mm/0.280ctルース(D, IF, 3Excellent H&C) GIA&中宝

[Lottery Sale_12] [For Winners Only] [Ref: 32501798] Internally Flawless Diamond (H&C) 4.2mm/0.280ct Loose Stone (D, IF, 3Excellent H&C) GIA Sale price¥138,000
インターナリーフローレスダイヤモンド（H&C） 4.7mm/0.413ctルース(D, IF, 3Excellent H&C)　GIA

【10/5 10:00 PM Release】Internally Flawless Diamond (H&C) 4.7mm / 0.413ct Loose Stone (D, IF, 3Excellent H&C) GIA & CGL Certified Sale price¥178,000
インターナリーフローレスダイヤモンド 3.7mm/0.238ctルース(E, IF)

[Deadline: Wed, 9/22, 10:00 AM: Lottery Sale_11] Internally Flawless Diamond 3.7mm/0.238ct Loose Stone (E, IF) Sale price¥59,800
K18 ダイヤモンド0.35ct フラワーモチーフリング鑑別書

[Item 22602768] [Color-Full] K18 0.35ct Diamond Ring with Appraisal Report Sale price¥128,000
Pt900 アイスブルーダイヤモンド・ ダイヤモンドリング鑑別書

[Item #22602735] [Colorifi] Pt900 Ice Blue Diamond (Treated) 0.24ct Diamond Ring with Appraisal Report Sale price¥89,800
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
K18 インペリアルトパーズ・ダイヤモンドリング鑑別書

[Item 22602770] K18 Imperial Topaz Ring with Appraisal Report Sale price¥128,000
K18WG ダイヤモンド 0.5ct ペンダントトップ（ネックレストップ）鑑別書

[Item 22602774] [Color-Full] K18WG 0.5ct Diamond Pendant Top (Necklace Top) with Appraisal Report Sale price¥35,800
ブルーダイヤモンド 0.064ctルース(FANCY LIGHT GREEN BLUE, VS-1)

[9/14 (Mon) 10:00 AM Deadline: Lottery Sale_05] Blue Diamond 0.064ct Loose Stone (FANCY LIGHT GREEN BLUE, VS-1) Sale price¥298,000
【Calafuri】Pt900 Ice Blue Diamond (Treated) 1.00ct Ring

【Calafuri】Pt900 Ice Blue Diamond (Treated) 1.00ct Ring Sale price¥158,000
Pt950レッドベリル0.20ct・ダイヤモンド0.23ctリング鑑別書

[On sale 9/20 at 22:00] [Color-free] Pt950 Red Beryl 0.20ct / Diamond 0.23ct Ring with Appraisal Report Sale price¥98,000
K18 アクアマリン 0.65ct・ダイヤモンド0.02ctリング 鑑別カード

【Available 9/20 at 10:00 PM】 Colorfuli K18 Aquamarine 0.65ct & Diamond 0.02ct Ring with Identification Card Sale price¥89,800
K18WGダイヤモンド 0.09ct ペンダントトップ（ネックレストップ）

[On Sale 9/20 at 10 PM] [Colori] K18WG 0.09ct Diamond Treble Clef Motif Pendant Top (Necklace Top) Sale price¥39,800
Pt900 ダイヤモンド1.00ct スリーストーンリング 鑑別書

[Available 9/30 at 10 PM] [Colori] Pt900 1.00ct Diamond Three-Stone Ring with Appraisal Report Sale price¥128,000
Pt900/Pt850 ピンクダイヤモンド 0.03ct・ダイヤモンド0.30ctペンダント（ネックレス）ミニ鑑別カード

[On sale 9/24 at 10 PM] [Colori] Pt900/Pt850 Pink Diamond 0.03ct & Diamond 0.30ct Pendant (Necklace) with Mini Identification Card Sale price¥79,800
ダイヤモンド 0.128ctルース（カボションカット,マロンカット）

Diamond 0.128ct loose stone (cabochon cut, maroon cut) Sale price¥45,800

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.