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blue diamond

A diamond with a blue hue. There are extremely few naturally blue ones, and they are highly valued as rare items. The ones you see on the market are those whose color has been changed through irradiation treatment. Diamond is the birthstone for April.

Karatz GemMagazine
" Blue Diamond "

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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 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
Pt950ベニトアイト0.10ct・アクアマリン・ブルーダイヤモンドリング - カラッツSTORE

Pt950 Benitoite 0.10ct Aquamarine Blue Diamond Ring Sale price¥98,000
Pt900アイスブルーダイヤモンド0.333ct 0.333ct ピアス

Pt900 ice blue diamond 0.333ct/0.333ct earrings Sale price¥98,000
Sold out Diamond gacha 💎Diamond gacha (treatment) where you can win a 12 stone set of color rings, ice blue diamonds, and purple diamonds (discount for multiple purchases available) [3,980 yen]

Diamond gacha 💎Diamond gacha (treatment) where you can win a 12 stone set of color rings, ice blue diamonds, and purple diamonds (discount for multiple purchases available) [3,980 yen]

Sold out Diamond gacha💎Diamond gacha (treatment) where you can win purple diamonds and ice blue diamonds (multiple purchase discount available)

Diamond gacha💎Diamond gacha (treatment) where you can win purple diamonds and ice blue diamonds (multiple purchase discount available)

Sold out Limited to 10 stones: Blue diamond rough and loose stone set of 2 (treated) Multiple purchase discount

Limited to 10 stones: Blue diamond rough and loose stone set of 2 (treated) Multiple purchase discount
Sold out Gem Gacha💎 Ice Blue Diamond, Moss Green Diamond, London Blue Diamond, etc. (1.8-4.2mm, Treated)

Gem Gacha💎 Ice Blue Diamond, Moss Green Diamond, London Blue Diamond, etc. (1.8-4.2mm, Treated)

Sold out [On sale from 10/27 at 10pm] Limited to 4 stones Ice blue diamond (VS class equivalent, 2mm) 1 loose stone [Multiple purchase discounts available]

[On sale from 10/27 at 10pm] Limited to 4 stones Ice blue diamond (VS class equivalent, 2mm) 1 loose stone [Multiple purchase discounts available]
Sold out アイスブルーダイヤモンド 0.099ctルース（VSクラス相当,マーキースカット）

Ice blue diamond 0.099ct loose (VS class equivalent, marquise cut)

Sold out [On sale from 10pm on 8/10] Limited to 2 stones: 1 London Blue Diamond (treated) loose stone (VS class equivalent, including round 3mm) [Multiple purchase discounts available]

[On sale from 10pm on 8/10] Limited to 2 stones: 1 London Blue Diamond (treated) loose stone (VS class equivalent, including round 3mm) [Multiple purchase discounts available]

Sold out アイスブルーダイヤモンド 1.021ctルース(FANCY INTENSE BLUE GREEN, I1) - KARATZ STORE｜カラッツSTORE

Ice blue diamond 1.021ct loose (FANCY INTENSE BLUE GREEN, I1, radiant cut)

Sold out Blue Diamond (Treatment) 0.286ct Loose

Blue Diamond (Treatment) 0.286ct Loose

Sold out 【12522625掲載】ダイヤモンド (トリートメント) 3.090ct原石

Blue Diamond (Treatment) 3.090ct rough stone, loose 2-piece set

Sold out 【31500915掲載】ブルーダイヤモンド（トリートメント） 0.179ctルース(FANCY DEEP GREEN BLUE treated, SI2)

Blue Diamond (Treatment) 0.179ct Loose (FANCY DEEP GREEN BLUE treated, SI2)

Sold out アイスブルーダイヤモンド 0.078ctルース（FANCY INTENSE GREEN BLUE／VVS-2）

Ice blue diamond 0.078ct loose (FANCY INTENSE GREEN BLUE/VVS-2)

Sold out 【12528331掲載】アイスブルーダイヤモンド 0.127ctルース

Ice blue diamond 0.127ct loose (FANCY GREEN BLUE,SI-2)

Sold out 【12528332掲載】アイスブルーダイヤモンド 0.207ctルース

Ice blue diamond 0.207ct loose (FANCY LIGHT BLUE GREEN,VS-2)

Sold out アイスブルーダイヤモンド 0.063ctルース（VSクラス相当）

Ice blue diamond 0.063ct loose (princess cut, VS class equivalent)

Sold out アイスブルーダイヤモンド 0.063ctルース

Ice blue diamond 0.063ct loose (princess cut, VS class equivalent)

Sold out アイスブルーダイヤモンド 0.066ctルース（VSクラス相当）

Ice blue diamond 0.066ct loose (princess cut, VS class equivalent)

Sold out アイスブルーダイヤモンド 0.068ctルース（VSクラス相当）

Ice blue diamond 0.068ct loose (princess cut, VS class equivalent)

Sold out アイスブルーダイヤモンド 0.068ctルース（VSクラス相当）

Ice blue diamond 0.068ct loose (princess cut, VS class equivalent)

Sold out アイスブルーダイヤモンド 0.073ctルース（VSクラス相当）

Ice blue diamond 0.073ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.062ctルース（VSクラス相当）

Ice blue diamond 0.062ct loose (princess cut, VS class equivalent)

Sold out 【12529120掲載】アイスブルーダイヤモンド 0.070ctルース

Ice blue diamond 0.070ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.072ctルース（VSクラス相当）

Ice blue diamond 0.072ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.074ctルース（VSクラス相当）

Ice blue diamond 0.074ct loose (equivalent to VS class)

Sold out 【12529128掲載】アイスブルーダイヤモンド 0.086ctルース

Ice blue diamond 0.086ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.098ctルース（プリンセスカット,VSクラス相当）

Ice blue diamond 0.098ct loose (princess cut, VS class equivalent)

Sold out 【12529132掲載】アイスブルーダイヤモンド 0.109ctルース

Ice blue diamond 0.109ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.086ctルース（VSクラス相当）

Ice blue diamond 0.086ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.043ctルース（VSクラス相当）

Ice blue diamond 0.043ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.051ctルース

Ice blue diamond 0.051ct loose

Sold out 【12529451掲載】アイスブルーダイヤモンド 0.052ctルース

Ice blue diamond 0.052ct loose (equivalent to VS class)

Sold out Ice blue diamond 0.076ct loose (VS class equivalent, bucket cut)

Ice blue diamond 0.076ct loose (VS class equivalent, bucket cut)

Sold out アイスブルーダイヤモンド 0.104ctルース（VSクラス相当）

Ice blue diamond 0.104ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.064ctルース（VSクラス相当）

Ice blue diamond 0.064ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.047ctルース（SIクラス相当）

Ice blue diamond 0.047ct loose (SI class equivalent)

Sold out オレゴンサンストーン 1.212ctルース

Ice blue diamond 0.065ct loose (SI class equivalent)

Sold out アイスブルーダイヤモンド 0.084ctルース（VSクラス相当）

Ice blue diamond 0.084ct loose (VS class equivalent)

Sold out アイスブルーダイヤモンド 0.126ctルース（VSクラス相当）

Ice blue diamond 0.126ct loose (equivalent to VS class)

Sold out アイスブルーダイヤモンド 0.056ctルース(FANCY GREENISH BLUE, VS1)

Ice blue diamond 0.056ct loose (FANCY GREENISH BLUE, VS1)

Sold out アイスブルーダイヤモンド 0.058ctルース(FANCY GREENISH BLUE, VS2)

Ice blue diamond 0.058ct loose (FANCY GREENISH BLUE, VS2)

Sold out アイスブルーダイヤモンド 0.062ctルース(FANCY GREENISH BLUE, VS2)

Ice blue diamond 0.062ct loose (FANCY GREENISH BLUE, VS2)

Sold out アイスブルーダイヤモンド 0.082ctルース(FANCY GREENISH BLUE, VS1)

Ice blue diamond 0.082ct loose (FANCY GREENISH BLUE, VS1)

Sold out アイスブルーダイヤモンド 0.142ctルース（SIクラス相当）

Ice blue diamond 0.142ct loose (SI class equivalent)

Sold out ブルーダイヤモンド (トリートメント) 原石・ルース2石セット 2.375ct

Blue Diamond (Treatment) Rough/Loose 2 Stone Set 2.375ct

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