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
" diamond "

coming soon

Pink diamond 2.2mm/0.041ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥49,800

coming soon

Pink diamond 2.3mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥69,800

Sold out

Pink diamond 2.2mm/0.043ct loose (FANCY LIGHT PURPLISH PINK, SI2)

Sold out

Gray Diamond 0.079ct Loose (FANCY DARK GRAY, I-1)

Sold out

Diamond 0.120ct loose (G, VS2, Excellent H&C)

Sold out

White Diamond 6.2mm/0.988ct Loose (FANCY WHITE, I2)

Sold out

Internally Flawless Diamond (H&C) 3.8mm/0.210ct Loose (F, IF, 3 Excellent H&C) GIA & Chuho

Sold out

Diamond 0.131ct loose (F, VS-1, octagonal cut)

Sold out

【32501456掲載】ピンクダイヤモンド（プリンセスカット） 0.089ctルース(FANCY LIGHT PURPLISH PINK, I-1)

[Posted in 32501456] Pink Diamond (Princess Cut) 0.089ct Loose (FANCY LIGHT PURPLISH PINK, I-1)

Sold out

イエローダイヤモンド 0.121ctルース(FANCY INTENSE YELLOW, VS-1)

[Posted in 32501431] Yellow Diamond 0.121ct Loose (FANCY INTENSE YELLOW, VS-1)

Sold out

イエローダイヤモンド 0.706ctルース(FANCY DEEP ORANGY YELLOW, I-1)

[Posted in 32501430] Yellow Diamond 0.706ct Loose (FANCY DEEP ORANGY YELLOW, I-1)

Sold out

【32501256掲載】イエローダイヤモンド 0.167ctルース(FANCY VIVID ORANGY YELLOW, VS-2)

[Posted in 32501256] Yellow Diamond 0.167ct Loose (FANCY VIVID ORANGY YELLOW, VS-2)

Sold out

グリーンイエローダイヤモンド 0.502ctルース(VERY LIGHT GREEN YELLOW, I1)

Green yellow diamond 5mm/0.502ct loose (VERY LIGHT GREEN YELLOW, I1)

Sold out

South African diamond 0.240ct rough stone

Sold out

Yellow Diamond (Cabochon Cut) 0.324ct Loose

Sold out

フローレスダイヤモンド（H&C） 4.2mm/0.276ctルース(D, FL, 3Excellent H&C)

Flawless Diamond (H&C) 4.2mm/0.276ct Loose (D, FL, 3Excellent H&C)

Sold out

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)

Forest Green Diamond (Treatment) 0.326ct Loose (FANCY DARK GRAY GREEN, SI-2)

Sold out

インターナリーフローレスダイヤモンド（H&C） 0.204ctルース(F, IF, 3Excellent H&C)

Internally Flawless Diamond (H&C) 0.204ct Loose (F, IF, 3Excellent H&C)

Sold out

South African diamond rough (sawable) 0.103ct rough (with trigon)

Sold out

フローレスダイヤモンド（H&C） 4.0mm/0.224ctルース(D, FL, 3Excellent H&C) GIA&中宝

[On sale from 10pm on 5/6] Flawless Diamond (H&C) 4.0mm/0.224ct Loose (D, FL, 3Excellent H&C) GIA & Chuho

Sold out

Diamond 3.2mm/0.129ct loose (F, SI-1, EXCELLENT)

Sold out

Diamond 0.215ct loose (rose 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

Brown Diamond 0.169ct Loose

Sold out

Pt950 Sri Lankan purple spinel 0.29ct diamond ring

Sold out

ダイヤモンド 2.5mm/0.057ctルース（VSクラス相当,ハートシェイプ）

Diamond 2.5mm/0.057ct loose stone (VS class equivalent, heart shape)

Sold out

Russian diamond rough (sawable) 0.618ct rough (trigon)

Sold out

Angola Green Diamond Rough (Sawable) 0.525ct Rough

Sold out

ラボグロウンダイヤモンド（合成ダイヤモンド） 0.730ctルース(D, IF, IDEAL)

Lab-grown Diamond (Synthetic Diamond) 0.730ct Loose (D, IF, IDEAL)

Sold out

カメレオンダイヤモンド 0.110ctルース(FANCY BROWNISH GREENISH YELLOW, SI2)

Chameleon Diamond 3mm/0.110ct Loose (FANCY BROWNISH GREENISH YELLOW, SI2)

Sold out

London Blue Diamond (Treatment) 0.202ct Loose (FANCY DEEP GREEN BLUE, VS2)

Sold out

Pt950 Diamond (Cabochon Cut) 0.131ct Ring

Sold out

ピンクダイヤモンド 0.031ctルース(FANCY PRPLISH PINK, SI1)

Pink Diamond 0.031ct Loose (FANCY PRPLISH PINK, SI1)

Sold out

インターナリーフローレスダイヤモンド 4mm/0.240ctルース(E, IF) GIA

Internally Flawless Diamond 4mm/0.240ct Loose (E, IF) GIA

Sold out

Internally Flawless Diamond 3.8mm/0.200ct Loose (E, IF) GIA

Sold out

Diamond rough (sawable) 0.416ct rough (trigon)

Sold out

ピンクダイヤモンド 2.2mm/0.044ctルース(FANCY PURPLE PINK, I-1)

Pink diamond 2.2mm/0.044ct loose (FANCY PURPLE PINK, I-1)

Sold out

Green diamond rough from South Africa (sawable) 0.233ct loose

Sold out

South African green diamond rough (makeable) 0.212ct loose

Sold out

Green diamond rough stone (sawable) 0.666ct rough stone

Sold out

Muckle Diamond 0.545ct rough stone (with trigon)

Sold out

Black diamond 0.316ct loose

Sold out

Gray diamond 0.159ct loose (FANCY GRAY, SI-2)

Sold out

ファンシーパープリッシュピンクダイヤモンド 1.7mm/0.022ctルース(FANCY PURPLISH PINK, SI2)

Fancy Purplish Pink Diamond 1.7mm/0.022ct Loose (FANCY PURPLISH PINK, SI2)

Sold out

Black diamond 1.290ct loose

Sold out

Black diamond 1.120ct loose

Sold out

ダイヤモンド 0.206ctルース(H, VVS1, 3Excellent H&C ハート＆キューピッド)

Diamond 3.8mm/0.206ct Loose (H, VVS1, 3Excellent H&C Heart & Cupid)

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)

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.