tourmaline

Tourmaline is one of the birthstones for October. It is a gemstone with so many color variations that it is said that there is no such thing as a non-existent color, and some gemstones show multiple colors within a single stone. It has the property of generating static electricity when heated, and its Japanese name is "tournament stone." Some are called by specific names depending on their color.

Karatz GemMagazine
" Tourmaline "

ブラジル産パライバトルマリン 0.265ctルース（CuO:0.7%、MnO:3.0%）

[On sale May 28, 10 PM JST] Brazilian Paraiba Tourmaline 0.265ct Loose Stone (CuO: 0.7%, MnO: 3.0%) Sale price¥29,800

ブラジル産パライバトルマリン 0.205ctルース（CuO:0.8%、MnO:3.1%）

【Sale starts May 28th at 10 PM JST】Brazilian Paraiba Tourmaline 0.205ct Loose Stone (CuO: 0.8%, MnO: 3.1%) Sale price¥39,800

ブラジル産パライバトルマリン 0.211ctルース（CuO:0.6%,MnO:3.1%）

[On sale May 28 at 10 PM] Brazilian Paraiba Tourmaline 0.211ct Loose Stone (CuO:0.6%, MnO:3.1%) Sale price¥39,800

Blue watermelon tourmaline 6.815ct loose Sale price¥49,800

Brazilian Paraiba Tourmaline 0.065ct Loose Stone (CuO: 2.0%, MnO: 2.4%) Sale price¥49,800

0.066ct loose Brazilian Paraiba Tourmaline (CuO: 1.5%, MnO: 2.2%) Sale price¥45,800

Paraiba Tourmaline from Brazil, 0.063 ct, loose (CuO: 1.8%, MnO: 2.4%) Sale price¥55,800

Loose 0.061ct Brazilian Paraiba Tourmaline (CuO: 1.7%, MnO: 2.2%) Sale price¥49,800

Brazilian Paraiba Tourmaline 0.055ct Loose (CuO:1.9%, MnO:2.2%) Sale price¥45,800

Paraiba Tourmaline from Brazil 0.056ct loose stone (CuO: 1.7%, MnO: 2.3%) Sale price¥45,800

0.062ct Loose Paraiba Tourmaline from Brazil (CuO: 1.7%, MnO: 2.5%) Sale price¥47,800

Brazilian Paraiba Tourmaline 0.058ct Loose Gemstone (CuO: 2.0%, MnO: 2.2%) Sale price¥39,800

Brazilian Paraiba Tourmaline 0.056ct Loose Stone (CuO:2.1%, MnO:2.2%) Sale price¥39,800

Pink tourmaline 0.845ct loose stone Sale price¥12,800

Paraiba tourmaline from Brazil 0.061ct loose Sale price¥25,800

Paraiba tourmaline from Brazil 0.049ct loose Sale price¥19,800

Paraiba tourmaline from Brazil 0.018ct loose Sale price¥12,800

Paraiba tourmaline from Brazil 0.023ct loose Sale price¥19,800

[On sale May 31, 10 PM JST] Brazilian Seafoam Tourmaline 4.1mm/0.280ct Loose Sale price¥15,800

[On sale June 6, 10 PM JST] Brazilian Seafoam Tourmaline 0.334ct Loose Stone Sale price¥16,800

Paraiba tourmaline from Brazil 0.071ct loose Sale price¥19,800

Tanzanian Chrome Tourmaline 0.760ct Loose Stone Sale price¥5,980

[On sale May 20th at 10 PM] Unheated Color Change Brazilian Paraiba Tourmaline 0.050ct Loose Stone GIA Sale price¥128,000

Pink tourmaline 1.157ct loose stone Sale price¥12,800

[On sale May 17th at 10 PM] Brazilian Paraiba Tourmaline 0.038ct Loose Stone (CuO: 1.3%, MnO: 2.7%) Sale price¥35,800

【Sales start at 10 PM on May 17th】Brazilian Paraiba Tourmaline 0.041ct Loose Stone (CuO:1.9%, MnO:4.3%) Sale price¥39,800

[Sale on 5/17 at 10 PM] Brazilian Paraiba Tourmaline 0.038ct Loose Stone (CuO: 1.6%, MnO: 2.8%) Sale price¥45,800

[On sale May 17th at 10 PM] Brazilian Paraiba Tourmaline 0.037ct Loose Stone (CuO:1.4%, MnO:2.6%) Sale price¥25,800

[On sale May 17th, 10 PM JST] Brazilian Paraiba Tourmaline 0.050ct Loose Stone (CuO: 1.9%, MnO: 3.6%) Sale price¥39,800

[On sale May 16, 10 PM JST] Brazilian Paraiba Tourmaline 0.039ct Loose Stone (CuO:1.6%, MnO:2.9%) Sale price¥35,800

[For Sale 10:00 PM May 16th] Brazilian Paraiba Tourmaline 0.035ct Loose Stone (CuO: 1.6%, MnO: 3.3%) Sale price¥29,800

Tanzanian Chrome Tourmaline 0.522ct Loose Stone Sale price¥3,980

Pink tourmaline 6.1mm/1.031ct loose stone Sale price¥12,800

Pink tourmaline 0.466ct loose Sale price¥8,800

ブラジル産トリカラートルマリン 32.207ctルース (パーティカラートルマリン）

[On sale May 10th at 10 PM] Brazilian Tricolor Tourmaline 32.207ct Loose Stone (Parti-color Tourmaline) Sale price¥398,000

[Sale on 5/23 at 10 PM JST] Brazilian Paraiba Tourmaline 0.170ct Loose Stone (CuO: 2.1%, MnO: 1.1%) Sale price¥258,000

Brazilian Indicolite Tourmaline 0.352ct Loose Stone with Certification Sale price¥29,800

モザンビーク産エルバイトトルマリン 1.456ctルース（CuO:0.1%,MnO:0.4%）

Elbaite tourmaline from Mozambique 1.456ct loose stone (CuO: 0.1%, MnO: 0.4%) Sale price¥45,800

モザンビーク産エルバイトトルマリン 1.574ctルース（CuO:0.1%,Mn0:3.1％）

Elbaite tourmaline from Mozambique 1.574ct loose stone (CuO: 0.1%, Mn0: 3.1%) Sale price¥55,800

Yellow tourmaline 0.277ct loose Sale price¥6,980

Green tourmaline 0.559ct loose Sale price¥6,980

Pink tourmaline 0.632ct loose Sale price¥9,800

Pink tourmaline 1.575ct loose Sale price¥12,800

Brazilian Bicolor Tourmaline 0.780ct Loose Sale price¥12,800

《New Arrivals from Tucson・Limited to 9 Stones》Canary Yellow Tourmaline from Zambia, average 0.18ct《Multi-purchase discount available》 Sale price¥3,980

Untreated Brazilian green tourmaline, 0.456 ct, loose (teal color) Sale price¥13,800

Lagoon Tourmaline from Afghanistan, 2.649 ct Loose Stone, Central Japan Gem Laboratory Sale price¥198,000

Untreated green tourmaline from Brazil, 0.596 ct, loose Sale price¥9,800

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.