• Login/New registration
  • All items
  • FAQ
  • inquiry
  • See reviews

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 "


Sort by
バイカラータンザナイト 2.355ct原石・ルース2石セット

【12/2 22時販売】バイカラータンザナイト 2.355ct原石・ルース2石セット Sale price¥9,800
タンザナイト 0.844ctルース

【11/28 22時販売】タンザニア産タンザナイト 6mm/0.844ctルース Sale price¥11,800
タンザナイト 0.797ctルース

【11/28 22時販売】タンザニア産タンザナイト 6.0mm/0.797ctルース Sale price¥12,800
タンザナイト 1.208ctルース

【11/29 22時販売】タンザニア産タンザナイト 7mm/1.208ct《コラボ》ルース ワッペン Sale price¥59,800
《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》 Sale price¥2,980
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
Limited to 21 stones: 1 loose Tanzanite stone from Tanzania (5 x 3 mm, oval cut) Multiple purchase discounts available

Limited to 21 stones: 1 loose Tanzanite stone from Tanzania (5 x 3 mm, oval cut) Multiple purchase discounts available Sale price¥4,980
【12543382掲載】バイカラータンザナイト 1.644ct原石

タンザニア産バイカラータンザナイト 1.644ct原石・ルース2石セット Sale price¥8,800
【12525124掲載】タンザナイト 1.07ctルース

タンザニア産タンザナイト 1.07ctルース Sale price¥22,800
バイカラータンザナイト 3.018ct原石

[On sale 11/4 at 22:00] Set of 2 Tanzanian bicolor tanzanite rough stones and loose stones, 3.018ct Sale price¥6,980
タンザナイト 1.36ルース

[On sale 11/3 at 22:00] Tanzanite from Tanzania 1.36ct loose stone Sale price¥49,800
タンザナイト 0.429ルース

[On sale 11/3 at 22:00] Tanzanite from Tanzania 4.6mm/0.429ct loose stone Sale price¥12,800
タンザニア産タンザナイト 0.478ctルース

[On sale at 10pm on 11/6] 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

[On sale 11/6 at 22:00] Tanzanite from Tanzania 0.351ct loose stone Sale price¥9,800
[On sale from 10/27 at 10pm] Set of 2 Tanzanite rough stones and loose stones from Tanzania (average 3.3ct, special cut) {Multiple purchase discounts available}

[On sale from 10/27 at 10pm] Set of 2 Tanzanite rough stones and loose stones from Tanzania (average 3.3ct, special cut) {Multiple purchase discounts available} Sale price¥6,980
[On sale from 10/27 at 10pm] Set of 2 Tanzanite rough stones and loose stones from Tanzania (average 3ct, cushion cut) {Multiple purchase discounts available}

[On sale from 10/27 at 10pm] Set of 2 Tanzanite rough stones and loose stones from Tanzania (average 3ct, cushion cut) {Multiple purchase discounts available} Sale price¥6,980
タンザニア産タンザナイト 0.298ctルース

[On sale at 10pm on 10/25] Tanzanite from Tanzania 0.298ct loose stone Sale price¥9,800
タンザニア産タンザナイト 0.250ctルース

[On sale at 10pm on 10/25] Tanzanite from Tanzania 0.250ct loose stone Sale price¥7,980
タンザニア産タンザナイト 0.326ctルース

[On sale at 10pm on 10/25] Tanzanite from Tanzania 0.326ct loose stone Sale price¥8,800
タンザニア産タンザナイト 0.321ctルース

[On sale at 10pm on 10/25] 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

[On sale at 10pm on 10/25] Tanzanite from Tanzania 0.250ct loose stone Sale price¥8,800
タンザナイト 1.522ctルース

[On sale at 10pm on 10/19] 1.522ct loose Tanzanite from Tanzania Sale price¥55,800
タンザナイト 0.655ctルース

[On sale at 10pm on 10/19] Tanzanite from Tanzania 0.655ct loose stone Sale price¥18,800
タンザナイト 0.794ctルース

[On sale at 10pm on 10/19] Tanzanite from Tanzania 0.794ct loose stone Sale price¥19,800
タンザナイト 0.804ctルース

[On sale at 10pm on 10/19] Tanzanite from Tanzania 0.804ct loose stone Sale price¥24,800
タンザナイト 0.856ctルース

[On sale at 10pm on 10/19] Tanzanite from Tanzania 0.856ct loose stone Sale price¥29,800
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
タンザニア産タンザナイト 0.800ctルース

Tanzanite from Tanzania 0.800ct loose stone Sale price¥25,800
タンザニア産タンザナイト 0.945ctルース

[On sale at 10pm on 9/17] Tanzanite from Tanzania 6.5mm/0.945ct loose stone Sale price¥28,800
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
タンザニア産タンザナイト 0.567ctルース

Tanzanite from Tanzania 0.567ct loose stone Sale price¥14,800
タンザナイト 1.295ctルース

Tanzanite from Tanzania 1.295ct loose stone Sale price¥29,800
タンザナイト 0.789ctルース

Tanzanite from Tanzania 0.789ct loose stone Sale price¥18,800
タンザナイト 2.011ctルース

Tanzanite from Tanzania 2.011ct loose stone Sale price¥65,800
タンザニア産タンザナイト 0.492ctルース

Tanzanite from Tanzania 0.492ct loose stone Sale price¥14,800
タンザニア産タンザナイト 1.250ctルース

Tanzanite from Tanzania 1.250ct loose stone Sale price¥22,800
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 Sale price¥59,800
【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
タンザニア産バイカラータンザナイト 2.454ct原石

Tanzanian bicolor tanzanite rough stone 2.454ct Sale price¥12,800
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

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.

KARATZ・Five Commitments