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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
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)

Ice Blue Diamond (Treatment) 3.2mm/0.139ct Loose (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)

Ice Blue Diamond (Treatment) 2.8mm/0.095ct Loose (Fancy Greenish Blue, SI1) Sale price¥19,800
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
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
Sold out [Jeweler's Tools] {3 sets remaining} 3-piece set: Jewelry loupe (14x magnification), blue diamond, and pink tourmaline or sapphire

[Jeweler's Tools] {3 sets remaining} 3-piece set: Jewelry loupe (14x magnification), blue diamond, and pink tourmaline or sapphire
Sold out 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
Sold out Limited to 9 stones: 1 London Blue Diamond Loose (VS-SI class equivalent, 2.0mm) Multiple purchase discounts available

Limited to 9 stones: 1 London Blue Diamond Loose (VS-SI class equivalent, 2.0mm) Multiple purchase discounts available
Sold out ブルーダイヤモンド 0.070ctルース(LIGHT BLUE, SI1)

Blue diamond 0.070ct loose (LIGHT BLUE, SI1)

Sold out 【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)

Sold out 【カラフリ】Pt900ブルーダイヤモンド0.20ct ペンダントトップ - カラッツSTORE

[Colorful] Pt900 blue diamond 0.20ct pendant top

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 アイスブルーダイヤモンド 3.0mm/0.090ctルース（Undetermined） GIA

Ice Blue Diamond 3.0mm/0.090ct Loose (Undetermined) GIA

Sold out ブラジル産パライバトルマリン・サンタマリアアクアマリン・アイスブルーダイヤモンド・タンザナイト１３石ハーフエタニティリングセット（2.0mm)

Brazilian Paraiba tourmaline, Santa Maria aquamarine, ice blue diamond, and 13-stone tanzanite half eternity ring set (2.0mm)

Sold out アイスブルーダイヤモンド 1.008ctルース(FANCY INTENSE GREENISH BLUE, I1)

Ice blue diamond 1.008ct loose (FANCY INTENSE GREENISH BLUE, I1, heart shape)

Sold out ブルーダイヤモンド (スターカット) 0.094ctルース(Treted FANCY INTENSE GREEN BLUE, VS1) - KARATZ STORE｜カラッツSTORE

Blue Diamond (Star Cut) 0.094ct Loose (Treted FANCY INTENSE GREEN 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.

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 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.