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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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タンザニア産タンザナイト 0.321ctルース

Tanzanite from Tanzania 0.321ct loose stone Sale price¥6,980
タンザニア産タンザナイト 0.250ctルース

Tanzanite from Tanzania 0.250ct loose stone Sale price¥8,800
タンザニア産タンザナイト 1.140ctルース

Tanzanite from Tanzania 1.140ct loose stone Sale price¥39,800
タンザナイト 1.162ctルース

Tanzanite from Tanzania 1.162ct loose stone Sale price¥39,800
タンザニア産タンザナイト 0.767ctルース

Tanzanite from Tanzania 0.767ct loose stone Sale price¥29,800
タンザナイト 1.243ctルース

Tanzanite from Tanzania 1.243ct loose stone Sale price¥45,800
タンザナイト 2.011ctルース

Tanzanite from Tanzania 2.011ct loose stone Sale price¥65,800
K18 Indian Iolite Sunstone 0.73ct Tanzanite Ring

K18 Indian Iolite Sunstone 0.73ct Tanzanite Ring Sale price¥188,000
【12551984掲載】バイカラータンザナイト 2.750ct原石

Tanzanian bicolor tanzanite rough stone 2.750ct Sale price¥9,800
Tanzanite from Tanzania 0.262ct loose stone

Tanzanite from Tanzania 0.262ct loose stone Sale price¥8,800
タンザニア産タンザナイト 0.491ctルース

Tanzanite from Tanzania 0.491ct loose stone Sale price¥8,800
タンザニア産タンザナイト 0.466ctルース

Tanzanite from Tanzania 0.466ct loose stone Sale price¥8,800
【スタッフセレクション】タンザナイト 0.231ctルース（セミオーダーメイドセット）

[Staff Selection] Tanzanite 0.231ct loose stone from Tanzania (semi-custom made set) Sale price¥47,800
ラベンダータンザナイト 0.498ctルース

Tanzanian Lavender Tanzanite 0.498ct Loose Stone Sale price¥14,800
ラベンダータンザナイト 0.382ctルース

Tanzanian Lavender Tanzanite 0.382ct Loose Stone Sale price¥12,800
ラベンダータンザナイト 0.558ctルース

Tanzanian Lavender Tanzanite 0.558ct Loose Stone Sale price¥12,800
バイカラータンザナイト 0.573ctルース

Tanzanian bicolor tanzanite 0.573ct loose stone Sale price¥15,800
タンザニア産ラベンダータンザナイト 0.577ctルース

Tanzanian Lavender Tanzanite 0.577ct Loose Stone Sale price¥15,800
タンザニア産タンザナイト 0.497ctルース

Tanzanite from Tanzania 0.497ct loose stone Sale price¥12,800
タンザニア産タンザナイト 0.245ctルース

Tanzanite from Tanzania 0.245ct loose stone Sale price¥9,800
タンザナイト 0.385ctルース

Tanzanite from Tanzania 0.385ct loose stone Sale price¥9,800
タンザニア産バイカラータンザナイト 0.544ctルース（セミオーダーメイドセット）

[Staff Selection] Tanzanian Bicolor Tanzanite 0.544ct Loose Stone (Semi-Custom Made Set) Sale price¥55,800
タンザナイト 0.760ctルース

Tanzanite 0.760ct loose stone (sugarloaf cut) Sale price¥9,800
タンザニア産タンザナイト 0.272ctルース

Tanzanite from Tanzania 0.272ct loose stone Sale price¥8,800
【スタッフセレクション】タンザニア産タンザナイト 0.262ctルース（セミオーダーメイドセッ

[Staff Selection] Tanzanite 0.262ct loose stone from Tanzania (semi-custom made set) Sale price¥74,800
バイカラータンザナイト 1.677ct原石

Bicolor Tanzanite 1.677ct rough stone Sale price¥8,800
バイカラータンザナイト 3.856ct原石

Bicolor Tanzanite 3.856ct rough stone Sale price¥19,800
バイカラータンザナイト 5.582ct原石

Bicolor Tanzanite 5.582ct rough stone Sale price¥29,800
Tanzanite 4.8mm/0.494ct loose stone

Tanzanite 4.8mm/0.494ct loose stone Sale price¥15,800
Bicolor Zoisite 1.100ct Loose Stone (Bicolor Tanzanite)

Bicolor Zoisite 1.100ct Loose Stone (Bicolor Tanzanite) Sale price¥19,800
ラベンダータンザナイト 0.784ctルース

Lavender Tanzanite 0.784ct loose stone Sale price¥14,800
タンザナイト 0.580ctルース

Tanzanite 5mm/0.580ct loose stone (sugarloaf cut) Sale price¥9,800
Tanzanite 0.349ct loose

Tanzanite 0.349ct loose Sale price¥9,800
タンザナイト 0.328ctルース

Tanzanite 0.328ct loose stone Sale price¥8,800
タンザナイト 1.360ctルース

Tanzanite 1.360ct loose stone Sale price¥49,800
タンザナイト 2.050ctルース

Tanzanian tanzanite 2.050ct loose Sale price¥29,800
K18タンザナイト1ct リング - KARATZ STORE｜カラッツSTORE

[Shinjuku Marui Annex 202511] 18K Tanzanite 1.0ct Ring Sale price¥79,800
Sold out 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}
Sold out 《Limited to 16 stones》1 tanzanite stone (octagonal cut, 3.0mm)《Multiple purchase discount available》

《Limited to 16 stones》1 tanzanite stone (octagonal cut, 3.0mm)《Multiple purchase discount available》
Sold out Tanzanite rough and loose stone set of 2 (average 3.3ct, special cut) from Tanzania {Multiple purchase discounts available}

Tanzanite rough and loose stone set of 2 (average 3.3ct, special cut) from Tanzania {Multiple purchase discounts available}

Sold out Bicolor tanzanite 2.270ct loose

Bicolor tanzanite 2.270ct loose

Sold out バイカラータンザナイト 0.581ctルース

Bicolor tanzanite 0.581ct loose
Sold out タンザニア産タンザナイト 0.637ctルース

[On sale at 10pm on November 7th] Tanzanite from Tanzania 0.637ct loose stone
Sold out 【サンジェ氏】タンザナイト 0.810ctルース - カラッツSTORE

Tanzanite 0.810ct loose stone
Sold out 【KEN氏】ラベンダータンザナイト 1.620ctルース - カラッツSTORE

Lavender Tanzanite 1.620ct Loose
Sold out タンザニア産タンザナイト 0.780ctルース

[Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.780ct Loose
Sold out タンザナイト 1.024ctルース

Tanzanite 1.024ct loose

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.