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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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[On sale from 10/3 at 10 PM] [Limited to 9 stones] Tanzanite loose stone from Tanzania (5x7mm, oval cut) [Multiple purchase discounts available]

[On sale from 10/3 at 10 PM] [Limited to 9 stones] Tanzanite loose stone from Tanzania (5x7mm, oval cut) [Multiple purchase discounts available] Sale price¥12,800
【10/12 22時販売】「紫陽夜」アイスブルーサファイア、アメシスト、ベキリーブルーガーネット、タンザナイト１３石ハーフエタニティリングセット（2.0mm)

【10/12 22時販売】「紫陽夜」アイスブルーサファイア、アメシスト、ベキリーブルーガーネット、タンザナイト１３石ハーフエタニティリングセット（2.0mm) Sale price¥98,000
タンザニア産ピンクゾイサイト 6.7mm/1.393ctルース（ピーチタンザナイト）

Pink zoisite from Tanzania 6.7mm/1.393ct loose (peach tanzanite) Sale price¥128,000
タンザニア産バイカラータンザナイト 1.165ct原石

Bicolor tanzanite 1.165ct rough stone from Tanzania Sale price¥7,980
タンザニア産バイカラータンザナイト 1.121ct原石

Bicolor tanzanite 1.121ct rough stone from Tanzania Sale price¥6,980
タンザニア産バイカラータンザナイト 0.492ct原石

Bicolor tanzanite 0.492ct raw stone from Tanzania Sale price¥6,980
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} Sale price¥1,580
《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 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 Sale price¥4,980
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
タンザナイト 4.940ct原石

Tanzanite 4.940ct rough stone Sale price¥3,980
タンザナイト 41.690ctルース

Tanzanite 41.690ct loose Sale price¥2,480,000
タンザナイト 2.720ctルース

Tanzanite 2.726ct loose Sale price¥110,000
タンザナイト 2.418ctルース

Tanzanite 2.418ct loose Sale price¥55,800
バイカラータンザナイト 2.304ctルース

[On sale at 10pm on 7/21] Tanzanian bicolor tanzanite 2.304ct loose stone Sale price¥59,800
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

[On Sale at 10 PM on August 7th] 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
タンザニア産タンザナイト 0.477ctルース

Tanzanite 0.477ct loose stone (princess cut) from Tanzania Sale price¥12,800
タンザニア産タンザナイト 0.520ctルース

Tanzanite from Tanzania 0.520ct 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 1.540ctルース

Tanzanite 1.540ct loose stone Sale price¥49,800
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
タンザニア産タンザナイト 1.045ctルース

Tanzanite from Tanzania 1.045ct loose stone Sale price¥29,800
Pt950 タンザナイト 1.357ct リング

Pt950 Tanzanian Tanzanite 1.357ct Blue Zircon Pink Sapphire Ring Sale price¥128,000
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 Sale price¥5,980
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
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 Sale price¥79,800
タンザニア産タンザナイト 0.331ctルース

Tanzanite from Tanzania 0.331ct loose stone Sale price¥5,980
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 0.432ctルース

Tanzanite from Tanzania 0.432ct loose stone Sale price¥9,800
タンザニア産タンザナイト 0.580ctルース

Tanzanite from Tanzania 0.580ct loose stone Sale price¥14,800
タンザニア産タンザナイト 0.495ctルース

Tanzanite from Tanzania 0.495ct loose stone Sale price¥12,800
タンザナイト 0.469ctルース

Tanzanite from Tanzania 0.469ct loose stone Sale price¥14,800
タンザナイト 0.269ctルース

Tanzanite from Tanzania 0.269ct loose stone Sale price¥9,800
タンザニア産タンザナイト 1.427ctルース

Tanzanite from Tanzania 7.0mm/1.427ct loose stone Sale price¥55,800
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
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 Sale price¥12,800
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 Sale price¥79,800
Myanmar spinel and Tanzanite 7 stone set ring (Alterno setting)

Myanmar spinel and Tanzanite 7 stone set ring (Alterno setting) Sale price¥79,800
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

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.