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tanzanite

Tanzanite, the December birthstone, is the name given to blue to violet zoisite. It is also known for its strong pleochroism, which means that its color changes depending on the angle from which it is viewed. Its Mohs hardness is 6-7, but it has a cleavage that makes it vulnerable to impacts from certain directions, so if you wear it as jewelry, you should be careful not to expose it to strong impacts.

Carats Gem Magazine
" Tanzanite "


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December Special Campaign: Limited to 14 stones. December birthstone: Tanzanite, loose stone (5x7mm, oval cut). Multiple purchase discounts available.

December Special Campaign: Limited to 14 stones. December birthstone: Tanzanite, loose stone (5x7mm, oval cut). Multiple purchase discounts available. Sale price¥8,800
[12/7 22:00] Tanzanite from Tanzania 0.436ct loose stone

[12/7 22:00] Tanzanite from Tanzania 0.436ct loose stone Sale price¥8,800
[12/7 22:00 Sale] Tanzanite from Tanzania 0.467ct Loose Stone

[12/7 22:00 Sale] Tanzanite from Tanzania 0.467ct Loose Stone Sale price¥9,800
バイカラータンザナイト 0.479ctルース

Bicolor tanzanite 0.479ct loose Sale price¥18,800
Set of 2 Tanzanite stones from Tanzania (2mm, round cut) {Multiple purchase discount available}

Set of 2 Tanzanite stones from Tanzania (2mm, round cut) {Multiple purchase discount available} Sale price¥1,580
Limited to 13 stones Gem gacha💎 Beautiful colored tanzanite 7mm, special cut sphene, heliodor (lots of inclusions) 1 loose stone Multiple purchase discounts available

Limited to 13 stones Gem gacha💎 Beautiful colored tanzanite 7mm, special cut sphene, heliodor (lots of inclusions) 1 loose stone Multiple purchase discounts available Sale price¥4,980
タンザナイト原石・ルース2石セット（シュガーローフカット）

Tanzanite raw stone/loose 2 stone set (sugar loaf cut)《Multiple purchase discount available》 Sale price¥6,980
[Sales start November 2nd at 10 PM] [Limited to 10 stones] Tanzanite rough gacha including bicolor pink tanzanite rough (average 4.2 carats) [Multiple purchase discounts available]

[Sales start November 2nd at 10 PM] [Limited to 10 stones] Tanzanite rough gacha including bicolor pink tanzanite rough (average 4.2 carats) [Multiple purchase discounts available] Sale price¥6,980
Tanzanite rough and loose stone set of 2 (average 3ct, cushion cut) from Tanzania {Multiple purchase discounts available}

Tanzanite rough and loose stone set of 2 (average 3ct, cushion cut) from Tanzania {Multiple purchase discounts available} Sale price¥6,980
[On Sale at 10 PM on December 5th] Tanzanian Bicolor Tanzanite (with Rainbow) 6.351ct Loose Stone

[On Sale at 10 PM on December 5th] Tanzanian Bicolor Tanzanite (with Rainbow) 6.351ct Loose Stone Sale price¥18,800
タンザナイト 1.747ctルース

[On Sale 11/23 10pm] Tanzanite from Tanzania 7.4mm/1.747ct Loose Stone Sale price¥59,800
[On sale at 10pm on November 25th] Tanzanite from Tanzania 0.342ct loose stone

[On sale at 10pm on November 25th] Tanzanite from Tanzania 0.342ct loose stone Sale price¥7,980
[On sale at 10pm on November 25th] Tanzanite from Tanzania 0.342ct loose stone

[On sale at 10pm on November 25th] Tanzanite from Tanzania 0.342ct loose stone Sale price¥7,980
タンザニア産ピンクゾイサイト 6.7mm/1.393ctルース（ピーチタンザナイト）

Pink zoisite from Tanzania 6.7mm/1.393ct loose (peach tanzanite) Sale price¥128,000
タンザニア産バイカラータンザナイト 1.165ct原石

Bicolor tanzanite 1.165ct rough stone from Tanzania Sale price¥7,980
タンザニア産バイカラータンザナイト 1.121ct原石

Bicolor tanzanite 1.121ct rough stone from Tanzania Sale price¥6,980
タンザニア産バイカラータンザナイト 0.492ct原石

Bicolor tanzanite 0.492ct raw stone from Tanzania Sale price¥6,980
タンザナイト 4.940ct原石

Tanzanite 4.940ct rough stone Sale price¥3,980
タンザナイト 41.690ctルース

Tanzanite 41.690ct loose Sale price¥2,480,000
タンザナイト 2.720ctルース

Tanzanite 2.726ct loose Sale price¥110,000
タンザナイト 2.418ctルース

Tanzanite 2.418ct loose Sale price¥55,800
バイカラータンザナイト 2.304ctルース

[On sale at 10pm on 7/21] Tanzanian bicolor tanzanite 2.304ct loose stone Sale price¥59,800
ラベンダータンザナイト 2.219ctルース

Tanzanian Lavender Tanzanite 2.219ct Loose Stone Sale price¥55,800
タンザニア産タンザナイト 0.350ctルース

Tanzanite from Tanzania 0.350ct loose stone Sale price¥8,800
タンザニア産タンザナイト 0.237ctルース

Tanzanite from Tanzania 0.237ct loose stone Sale price¥8,800
タンザニア産タンザナイト 0.432ctルース

Tanzanite from Tanzania 0.432ct loose stone Sale price¥12,800
タンザニア産タンザナイト 0.477ctルース

Tanzanite 0.477ct loose stone (princess cut) from Tanzania Sale price¥12,800
タンザニア産タンザナイト 0.520ctルース

Tanzanite from Tanzania 0.520ct loose stone Sale price¥12,800
タンザニア産バイカラータンザナイト 1.284ctルース

Tanzanian bicolor tanzanite 1.284ct loose stone Sale price¥29,800
タンザニア産タンザナイト 0.803ctルース

Tanzanite from Tanzania 5.8mm/0.803ct loose stone Sale price¥35,800
タンザナイト 1.055ctルース

Tanzanite 1.055ct loose stone Sale price¥29,800
タンザナイト 1.458ctルース

Tanzanite 1.458ct loose stone Sale price¥39,800
タンザニア産タンザナイト 1.045ctルース

Tanzanite from Tanzania 1.045ct loose stone Sale price¥29,800
Pt950 タンザナイト 1.357ct リング

Pt950 Tanzanian Tanzanite 1.357ct Blue Zircon Pink Sapphire Ring Sale price¥128,000
タンザナイト 0.531ctルース

Tanzanite from Tanzania 4.9mm/0.531ct loose stone Sale price¥12,800
タンザナイト 0.503ctルース

Tanzanite from Tanzania 4.7mm/0.503ct loose stone Sale price¥14,800
タンザニア産タンザナイト 0.331ctルース

Tanzanite from Tanzania 0.331ct loose stone Sale price¥5,980
タンザニア産タンザナイト 0.513ctルース (シュガーローフカット）

Tanzanite 0.513ct loose stone (sugarloaf cut) from Tanzania Sale price¥9,800
タンザニア産タンザナイト 0.432ctルース

Tanzanite from Tanzania 0.432ct loose stone Sale price¥9,800
タンザニア産タンザナイト 0.580ctルース

Tanzanite from Tanzania 0.580ct loose stone Sale price¥14,800
タンザニア産タンザナイト 0.495ctルース

Tanzanite from Tanzania 0.495ct loose stone Sale price¥12,800
タンザナイト 0.469ctルース

Tanzanite from Tanzania 0.469ct loose stone Sale price¥14,800
タンザナイト 0.269ctルース

Tanzanite from Tanzania 0.269ct loose stone Sale price¥9,800
タンザニア産タンザナイト 1.427ctルース

Tanzanite from Tanzania 7.0mm/1.427ct loose stone Sale price¥55,800
タンザニア産タンザナイト 0.609ctルース

Tanzanite from Tanzania 0.609ct loose stone Sale price¥15,800
Myanmar spinel and Tanzanite 7 stone set ring (Alterno setting)

Myanmar spinel and Tanzanite 7 stone set ring (Alterno setting) Sale price¥79,800
タンザニア産バイカラータンザナイト 4.804ct原石

Tanzanian bicolor tanzanite 4.804ct rough stone Sale price¥18,800
【12543382掲載】バイカラータンザナイト 1.644ct原石

Tanzanian bicolor tanzanite 1.644ct rough and loose stone set of 2 Sale price¥8,800

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.