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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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Myanmar spinel and Tanzanite 7 stone set ring (Alterno setting)

Myanmar spinel and Tanzanite 7 stone set ring (Alterno setting) Sale price¥98,000
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
バイカラータンザナイト 3.018ct原石

Tanzanian bicolor tanzanite 3.018ct rough and loose stone set of 2 Sale price¥6,980
タンザナイト 1.36ルース

Tanzanite from Tanzania 1.36ct loose stone Sale price¥49,800
タンザニア産タンザナイト 0.478ctルース

Tanzanite from Tanzania 0.478ct loose stone Sale price¥9,800
タンザニア産タンザナイト 0.351ctルース

Tanzanite from Tanzania 0.351ct loose stone Sale price¥9,800
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¥7,980
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
タンザナイト 0.804ctルース

Tanzanite from Tanzania 0.804ct loose stone Sale price¥24,800
【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
【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
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
【12546376更新】タンザナイト 1.593ctルース

Tanzanite 1.593ct loose Sale price¥15,800
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
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 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
Sold out Limited to 10 stones: Tanzanite rough stone gacha including bicolor pink tanzanite rough stones (average 4.2 carats) [Multiple purchase discounts available]

Limited to 10 stones: Tanzanite rough stone gacha including bicolor pink tanzanite rough stones (average 4.2 carats) [Multiple purchase discounts available]
Sold out [Available at 10 PM on January 10th] Zoisite Gacha with Certificate of Authenticity (Includes Pink Zoisite, Yellow Zoisite, Green Zoisite, and Tanzanite, 5mm) [Multiple Purchase Discounts Available]

[Available at 10 PM on January 10th] Zoisite Gacha with Certificate of Authenticity (Includes Pink Zoisite, Yellow Zoisite, Green Zoisite, and Tanzanite, 5mm) [Multiple Purchase Discounts 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 タンザナイト 0.580ctルース

Tanzanite 5mm/0.580ct loose stone (sugarloaf cut)
Sold out [On Sale 2/12 10pm] Tanzanite 0.505ct Loose Stone from Tanzania

[On Sale 2/12 10pm] Tanzanite 0.505ct Loose Stone from Tanzania

Sold out [On Sale at 10 PM on February 5th] Tanzanite from Tanzania, 4.5mm/0.390ct Loose Stone, AIGS

[On Sale at 10 PM on February 5th] Tanzanite from Tanzania, 4.5mm/0.390ct Loose Stone, AIGS
Sold out [On Sale 2/7 at 10pm] Tanzanite from Tanzania 0.417ct Loose Stone

[On Sale 2/7 at 10pm] Tanzanite from Tanzania 0.417ct Loose Stone
Sold out 18K Yellow Gold Lavender Tanzanite 3.5mm/0.211ct Diamond Ring

18K Yellow Gold Lavender Tanzanite 3.5mm/0.211ct Diamond Ring
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

Tanzanite from Tanzania 0.637ct loose stone
Sold out "Purple Sun Night" Ice Blue Sapphire, Amethyst, Bekiri Blue Garnet, and Tanzanite 13-Stone Half Eternity Ring Set (2.0mm)

"Purple Sun Night" Ice Blue Sapphire, Amethyst, Bekiri Blue Garnet, and Tanzanite 13-Stone Half Eternity Ring Set (2.0mm)

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.