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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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ラベンダータンザナイト 2.219ctルース

Tanzanian Lavender Tanzanite 2.219ct Loose Stone Sale price¥55,800
タンザニア産タンザナイト 0.350ctルース

Tanzanite from Tanzania 0.350ct loose stone Sale price¥8,800
タンザニア産タンザナイト 0.237ctルース

Tanzanite from Tanzania 0.237ct loose stone Sale price¥8,800
タンザニア産タンザナイト 0.432ctルース

Tanzanite from Tanzania 0.432ct loose stone Sale price¥12,800
タンザニア産バイカラータンザナイト 1.284ctルース

Tanzanian bicolor tanzanite 1.284ct loose stone Sale price¥29,800
タンザニア産タンザナイト 0.803ctルース

Tanzanite from Tanzania 5.8mm/0.803ct loose stone Sale price¥35,800
タンザナイト 1.055ctルース

Tanzanite 1.055ct loose stone Sale price¥29,800
タンザナイト 1.458ctルース

Tanzanite 1.458ct loose stone Sale price¥39,800
タンザナイト 0.531ctルース

Tanzanite from Tanzania 4.9mm/0.531ct loose stone Sale price¥12,800
タンザナイト 0.503ctルース

Tanzanite from Tanzania 4.7mm/0.503ct loose stone Sale price¥14,800
タンザニア産タンザナイト 0.734ctルース

Tanzanite from Tanzania 0.734ct loose stone Sale price¥12,800
タンザニア産タンザナイト 0.513ctルース (シュガーローフカット）

Tanzanite 0.513ct loose stone (sugarloaf cut) from Tanzania Sale price¥9,800
タンザニア産タンザナイト 1.053ctルース

Tanzanite from Tanzania 1.053ct loose stone Sale price¥25,800
タンザニア産タンザナイト 0.609ctルース

Tanzanite from Tanzania 0.609ct loose stone Sale price¥15,800
Myanmar spinel and Tanzanite 7 stone set ring (Alterno setting)

Myanmar spinel and Tanzanite 7 stone set ring (Alterno setting) Sale price¥98,000
【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

Tanzanian Tanzanite 1.36ct Loose 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
K18 Indian Iolite Sunstone 0.73ct Tanzanite Ring

K18 Indian Iolite Sunstone 0.73ct Tanzanite Ring Sale price¥188,000
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
タンザナイト 1.360ctルース

Tanzanite 1.360ct loose stone Sale price¥49,800
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 12 items》 Blue Gemstone Gacha: Paraiba Tourmaline, Euclase, Tanzanite, etc. (Plus 1 Aquamarine)《Multi-purchase discount available》

《Limited to 12 items》 Blue Gemstone Gacha: Paraiba Tourmaline, Euclase, Tanzanite, etc. (Plus 1 Aquamarine)《Multi-purchase discount available》
Sold out Tanzanite 1 stone loose (5x7mm, oval cut) 《Multiple purchase discount available》

Tanzanite 1 stone loose (5x7mm, oval cut) 《Multiple purchase discount available》
Sold out 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》

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 [Sales start 8/29 at 22:00] <limited to stones> Purple Scapolite, including Koshu Kiseki Kiriko Purple Scapolite (regular price 59,800 yen), with 1 free Tanzanite stone by Mr. Sange included <multi-purchase discount available></multi-purchase></limited>

[Sales start 8/29 at 22:00] Purple Scapolite, including Koshu Kiseki Kiriko Purple Scapolite (regular price 59,800 yen), with 1 free Tanzanite stone by Mr. Sange included

Sold out «Limited to 6 stones» Zoisite Gacha, all stones include identification reports (includes pink zoisite, yellow zoisite, green zoisite, and tanzanite, 5mm) «Multiple purchase discounts available»

«Limited to 6 stones» Zoisite Gacha, all stones include identification reports (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 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 K18WG タンザナイト1.79ct・ダイヤモンド0.07ctペンダント（ネックレス）

[On sale 9/20 at 10:00 PM] [Colorifi] 18K White Gold Tanzanite 1.79ct / Diamond 0.07ct Pendant (Necklace)
Sold out Pt900 タンザナイト0.99ct・ダイヤモンド・エメラルド ペンダントトップ鑑別書

[Available 9/18 at 10 PM] [Coloriful] Pt900 Tanzanite 0.99ct, Diamond, & Emerald Pendant Top (Includes Appraisal Report)
Sold out 【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
Sold out K18WG ブルーサファイア パライバトルマリン、アクアマリン、エメラルド、アイスブルーダイヤモンド(トリートメント)、ブルーサファイア、イエローサファイア、アパタイト、ペリドット、タンザナイト、ブルートパーズリング鑑別書

[Available 9/9 at 10 PM] [Colori] K18WG Blue Sapphire, Paraiba Tourmaline, Aquamarine, Emerald, Ice Blue Diamond, Yellow Sapphire, Apatite, Peridot, Tanzanite, Blue Topaz Ring with Appraisal Certificate
Sold out タンザナイト 1.182ctルース

[Available 9/7 at 10 PM] Tanzanian Tanzanite 6.3mm/1.182ct Loose Gemstone
Sold out タンザニア産ピンクゾイサイト 0.835ctルース

[Lottery Sale 0718_09] Tanzanian Pink Zoisite 0.835ct Loose Stone with Gem Identification Report

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.