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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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Tanzanite 1.180ct loose Sale price¥24,800

Tanzanite 2.675ct loose Sale price¥32,800

Tanzanite 1.741ct loose Sale price¥45,800

Tanzanite 1.024ct loose Sale price¥15,800

Tanzanite 2.358ct loose Sale price¥69,800

Tanzanite 1.680ct loose Sale price¥29,800

Tanzanite 41.690ct loose Sale price¥2,480,000

Tanzanite 1.614ct loose Sale price¥24,800

Tanzanite 6.320ct loose Sale price¥128,000

K18 tanzanite 1ct ring Sale price¥79,800

Sold out 1 stone tanzanite (rose cut, 4mm)
Sold out Bicolor tanzanite 2.270ct loose
Sold out 【11/18 22時販売】タンザニア産バイカラータンザナイト 5.506ct原石
Sold out タンザニア産タンザナイト 0.492ctルース
Sold out Pt950タンザニア産タンザナイト0.51ct・ピンクダイヤモンドリング
Sold out タンザニア産タンザナイト 2.565ct原石・ルース2石セット
Sold out タンザニア産タンザナイト 0.379ctルース
Sold out タンザニア産バイカラータンザナイト(バイカラーゾイサイト)0.380ctルース
Sold out タンザナイト 0.678ctルース
Sold out バイカラータンザナイト 0.545ct原石
Sold out タンザナイト 0.671ctルース
Sold out Pt950タンザナイト0.984ct リング
Sold out タンザナイト 0.272ctルース
Sold out バイカラータンザナイト 2.661ctルース
Sold out タンザナイト 0.579ctルース
Sold out タンザナイト 0.525ctルース
Sold out タンザナイト 0.435ctルース
Sold out タンザナイト 6.5mm/1.203ctルース
Sold out タンザナイト 5mm/0.589ctルース(プリンセスカット)
Sold out 【サンジェ氏】ラベンダータンザナイト 0.570ctルース
Sold out タンザナイト 6.5mm/1.280ctルース
Sold out タンザナイト 3.620ctルース(シュガーローフカット)
Sold out バイカラータンザナイト 0.849ctルース
Sold out タンザニア産バイカラータンザナイト 1.201ct原石

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.