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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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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 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 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}

Sold out Bicolor tanzanite 2.270ct loose

Bicolor tanzanite 2.270ct loose

Sold out タンザニア産タンザナイト 0.328ctルース

【On sale May 30th at 10 PM JST】Tanzanian Tanzanite 0.328ct Loose Stone
Sold out 【22602564掲載】K18 タンザナイト リング

[Sales start May 2, 10 PM] K18 Tanzanite Chain Ring
Sold out Tanzanian Bicolor Tanzanite 0.419 ct Loose Stone

Tanzanian Bicolor Tanzanite 0.419 ct Loose Stone
Sold out タンザナイト 0.580ctルース

Tanzanite 5mm/0.580ct loose stone (sugarloaf cut)
Sold out Tanzanite from Tanzania 0.331ct loose stone

Tanzanite from Tanzania 0.331ct loose stone
Sold out Tanzanite 0.505ct loose stone from Tanzania

Tanzanite 0.505ct loose stone from Tanzania

Sold out Tanzanite from Tanzania 4.5mm/0.390ct Loose Stone AIGS

Tanzanite from Tanzania 4.5mm/0.390ct Loose Stone AIGS
Sold out Tanzanite from Tanzania 0.417ct Loose Gemstone

Tanzanite from Tanzania 0.417ct Loose Gemstone
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 [Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone

[Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone
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)

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 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 4.940ct原石

Tanzanite 4.940ct rough stone
Sold out タンザナイト 1.024ctルース

Tanzanite 1.024ct loose
Sold out タンザナイト 1.540ctルース

Tanzanite 1.540ct loose stone
Sold out バイカラータンザナイト 0.585ctルース

Tanzanian bicolor tanzanite 5.0mm/0.585ct loose stone
Sold out タンザナイト 5.930ct原石

Tanzanite rough stone from Tanzania 5.930ct
Sold out Limited to 9 stones: 1 Tanzanian purple zoisite (purple tanzanite) loose stone (4mm, round cut) Multiple purchase discounts available

Limited to 9 stones: 1 Tanzanian purple zoisite (purple tanzanite) loose stone (4mm, round cut) Multiple purchase discounts available
Sold out バイカラータンザナイト 0.739ctルース

Tanzanian bicolor tanzanite 0.739ct loose stone
Sold out K18PG ブラジル産カラーシフトアメジスト・ハックマナイト・ピンクサファイアリング

K18PG Brazilian color shift amethyst, hackmanite, pink sapphire ring

Sold out 【さくらインカット】タンザナイト 6.0mm/0.701ctルース

[12557950] Tanzanite 0.701ct {Collaboration} Loose Stone

Sold out タンザニア産タンザナイト 0.495ctルース

Tanzanite from Tanzania 0.495ct loose stone
Sold out タンザナイト 0.469ctルース

Tanzanite from Tanzania 0.469ct loose stone
Sold out タンザニア産タンザナイト 0.481ctルース

Tanzanite from Tanzania 5.0mm/0.481ct loose stone
Sold out K18YGアフガニスタン産クンツァイト 0.74ct・タンザナイト・サファイアリング

K18YG Afghan Kunzite 0.74ct, Tanzanite, Sapphire Ring
Sold out Night purple 13 stone set (hackmanite, tanzanite, black spinel, diamond, etc.) Half eternity ring set (2.0mm)

Night purple 13 stone set (hackmanite, tanzanite, black spinel, diamond, etc.) Half eternity ring set (2.0mm)
Sold out タンザナイト 0.429ルース

Tanzanite from Tanzania 4.6mm/0.429ct loose stone
Sold out タンザニア産タンザナイト 0.298ctルース

Tanzanite from Tanzania 0.298ct loose stone
Sold out タンザナイト 0.856ctルース

Tanzanite from Tanzania 0.856ct loose stone
Sold out K18PGベニトアイト0.19 リング

K18PG American Benitoite 0.19ct Tanzanite Ring
Sold out タンザニア産タンザナイト 1.140ctルース

Tanzanite from Tanzania 1.140ct loose stone
Sold out タンザニア産タンザナイト 0.945ctルース

Tanzanite from Tanzania 6.5mm/0.945ct loose stone

Sold out タンザナイト 1.577ctルース

Tanzanite from Tanzania 1.577ct loose stone
Sold out タンザナイト 1.243ctルース

Tanzanite from Tanzania 1.243ct loose stone
Sold out タンザニア産タンザナイト 0.567ctルース

Tanzanite from Tanzania 0.567ct loose stone
Sold out タンザナイト 2.011ctルース

Tanzanite from Tanzania 2.011ct loose stone
Sold out タンザナイト 6.006ctルース

Tanzanite from Tanzania 6.006ct loose stone
Sold out タンザニア産タンザナイト 0.492ctルース

Tanzanite from Tanzania 0.492ct loose stone

Sold out タンザニア産タンザナイト 1.250ctルース

Tanzanite from Tanzania 1.250ct loose stone

Sold out タンザニア産タンザナイト 6mm/0.889ct《コラボ》ルース ワッペン

[Sakura Shape] Tanzanite from Tanzania 6mm/0.889ct {Collaboration} Loose Patch

Sold out タンザニア産バイカラータンザナイト 2.454ct原石

Tanzanian bicolor tanzanite rough stone 2.454ct

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.