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 "

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} Sale price¥1,580

Pt900 ice blue diamond 0.333ct/0.333ct earrings Sale price¥98,000

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

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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]

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

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

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

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[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]

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[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]

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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)

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冬色宝石13石セット（サンタマリアクアマリン・タンザナイト・アイスブルーダイヤモンド・インディゴトルマリン）・ハーフエタニティリングセット（2.0mm)

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Ice blue diamond 0.060ct loose

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Ice blue diamond 0.055ct loose (VS class equivalent, heart shape)

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Ice blue diamond 0.053ct loose (VS class equivalent, heart shape)

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K18 Brazilian Paraiba Tourmaline 0.588ct, Blue Diamond, Paraiba Tourmaline Pendant (Necklace)

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K18 Brazilian Paraiba Tourmaline 0.20ct Blue Diamond Ring

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Ice blue diamond 0.051ct loose (equivalent to VS class)

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Ice blue diamond 0.064ct loose (SI class equivalent)

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【カラフリ】K18WGブルーダイヤモンド（トリートメント）0.11ct ピアス - カラッツSTORE

[Colorful] K18WG blue diamond (treatment) 0.11ct earrings

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K18ベニトアイト0.11ct・アイスブルーダイヤモンド・パライバトルマリンリング - カラッツSTORE

K18 Benitoite 0.11ct/Ice Blue Diamond/Paraiba Tourmaline Ring

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Pt950スピネル0.23ct・ブルーダイヤモンド・ガーナイトピンキーリング - カラッツSTORE

Pt950 spinel 0.23ct/blue diamond/garnite pinky ring

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ブルーダイヤモンド（トリートメント） 0.653ctルース(FANCY DEEP GREENISH BLUE*, SI-2)

London Blue Diamond (Treatment) 0.653ct Loose (FANCY DEEP GREENISH BLUE, SI-2)

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アイスブルーダイヤモンド2石セット 2mm/0.076ctルース（VSクラス相当）

Ice blue diamond 2 stone set 2mm/0.076ct loose (VS class equivalent)

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ロンドンブルーダイヤモンド（トリートメント） 2.4mm/0.060ctルース（VSクラス相当）

London Blue Diamond (Treatment) 2.4mm/0.060ct Loose (VS class equivalent)

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Ice blue diamond 2.5mm/0.067ct loose (equivalent to VS class)

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ロンドンブルーダイヤモンド（トリートメント） 2.5mm/0.070ctルース（VSクラス相当）

London Blue Diamond (Treatment) 2.5mm/0.070ct Loose (VS class equivalent)

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ロンドンブルーダイヤモンド（トリートメント）2石セット 2.3mm/0.123ctルース（VSクラス相当）

London Blue Diamond (Treatment) 2 stone set 2.3mm/0.123ct loose (VS class equivalent)

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アイスブルーダイヤモンド 0.097ctルース(FANCY GREENISH BLUE, VS-1)

Ice blue diamond 2.9mm/0.097ct loose (FANCY GREENISH BLUE, VS-1)

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アイスブルーダイヤモンド 4.2mm/0.277ctルース(FANCY LIGHT GREENISH BLUE, SI-1)

Ice blue diamond 4.2mm/0.277ct loose (FANCY LIGHT GREENISH BLUE, SI-1)

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アイスブルーダイヤモンド 0.108ctルース（VSクラス相当,マーキースカット）

Ice blue diamond 0.108ct loose (VS class equivalent, marquise cut)

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Ice blue diamond 2.3mm/0.069ct loose (VS class equivalent, princess cut)

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

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アイスブルーダイヤモンド 0.040ctルース（VSクラス相当,マーキースカット）

Ice blue diamond 0.040ct loose (VS class equivalent, marquise cut)

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Ice blue diamond 0.040ct loose (VS class equivalent, marquise cut)

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アイスブルーダイヤモンド 0.066ctルース（VSクラス相当,プリンセスカット）

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

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アイスブルーダイヤモンド 0.040ctルース（VSクラス相当,プリンセスカット）

Ice blue diamond 0.040ct loose (VS class equivalent, princess cut)

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アイスブルーダイヤモンド 0.037ctルース（VSクラス相当,プリンセスカット）

Ice blue diamond 0.037ct loose (VS class equivalent, princess cut)

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アイスブルーダイヤモンド 2.7mm/0.093ctルース（VSクラス相当,ラウンドカット）

Ice blue diamond 2.7mm/0.093ct loose (VS class equivalent, round cut)

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ロンドンブルーダイヤモンド（トリートメント） 2.3mm/0.113ct 2石ペアルース（VSクラス相当）

London Blue Diamond (Treatment) 2.3mm/0.113ct 2 stone pair loose (VS class equivalent)

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Blue diamond 0.070ct loose (LIGHT BLUE, SI1)

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【32501006掲載】ブルーダイヤモンド 0.051ctルース(LIGHT GRAYISH BLUE, SI1)

Blue diamond 0.051ct loose (LIGHT GRAYISH BLUE, SI1)

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

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Ice blue diamond 0.142ct loose (SI class equivalent)

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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)

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