alexandrite

Alexandrite is known as one of the birthstones for June. Its main feature is its color-change effect, which means that its color changes depending on the light source. It was once mined in large quantities in Russia, but today its main production area is said to be Brazil. Since it is difficult to find large stones, the larger they are and the more obvious their color-change effect is, the more valuable they are.

Carats Gem Magazine
" alexandrite "

[6/ 10 PM JST Release] 《Limited to 11 Stones》Bicolor Gemstone Gacha featuring Paraiba Tourmaline and Euclase 《Bulk Purchase Discount Available》 Sale price¥3,980

【9/12 22時販売】《限定10石》ロシア産アレキサンドライト・ブラジル産アレキサンドライトガチャ（サンジェ氏クリソベリル１石付き）《複数購入割引有》 Sale price¥3,980

K18WG アレキサンドライト 0.32ct ダイヤモンド0.29ctペンダントトップ（ネックレストップ）鑑別書

[Listed in 22602716] [Colorfuri] K18WG Alexandrite 0.32ct Diamond 0.29ct Pendant Top with Certificate Sale price¥128,000

K18WG アレキサンドライト 0.64ct ダイヤモンド0.04ctペンダントトップ（ネックレストップ）鑑別書

[Published in 22602715] [Colorful] K18WG Alexandrite 0.64ct Diamond 0.04ct Pendant Top (Necklace Top) with Identification Report Sale price¥228,000

[#202607 Akihabara Pop-up Store - Currently Removed from Stock] [12554030 Listed] Alexandrite Cat's Eye 1.655ct Loose Stone Sale price¥98,000

Synthetic Alexandrite 0.578ct loose stone Sale price¥9,800

Pt900合成アレキサンドライト0.41ct・ダイヤモンド0.54ctリング鑑別書

[Lottery Sale 0812_08] Pt900 Synthetic Alexandrite and 0.54ct Diamond Ring with Certificate Sale price¥128,000

Brazilian Alexandrite 0.105ct Loose Stone [Listed under 12563842] Sale price¥29,800

[Available at 10 PM on February 15th] [Limited to 150 stones - New in Tucson] Brazilian Alexandrite Loose Stone (Top Quality, Melee Size, Hemachita Mine) [Multiple Purchase Discounts Available] Sale price¥3,980

Limited to 15 stones: Brazilian Silky Alexandrite Loose Stone (2.5-3.0mm, Round Cut) - Multiple Purchase Discounts Available Sale price¥7,980

Limited to 8 stones: 1 loose synthetic alexandrite (custom cut by Mr. Sanjay, shield cut, octagonal cut, etc.) Discounts available for multiple purchases Sale price¥6,980

Limited to 8 stones: 1 Brazilian Alexandrite loose stone (rose cut, 3.2mm/average 0.12ct) Multiple purchase discounts available Sale price¥11,000

Limited to 9 stones: 1 Brazilian Alexandrite loose stone (rose cut, 3mm/average 0.105ct) Multiple purchase discounts available Sale price¥9,800

[#202607 Akihabara Pop-up Store - Currently Removed] [Shinjuku Marui Annex 202605 - Currently Removed] [12559525 Listed] Synthetic Alexandrite 1.409ct Loose Stone Sale price¥39,800

Brazilian Alexandrite 0.102ct Loose Stone with Certification Sale price¥29,800

[Listing No. 12563397] Brazilian Alexandrite 0.217 ct Loose Stone Sale price¥39,800

Synthetic Alexandrite 0.287ct loose stone Sale price¥8,800

Pt950 アレキサンドライト 0.08ct・ダイヤモンド0.25ctリング鑑別カード

[COLORFUL] Pt950 Alexandrite 0.08ct Diamond 0.25ct Ring with Appraisal Card Sale price¥98,000

Brazilian Silky Alexandrite 0.265ct Loose Stone with Certification Sale price¥45,800

Synthetic Alexandrite 1.076ct Loose Stone Sale price¥25,800

Indian Orissa Alexandrite 0.759ct Loose Stone with Gemstone Identification Report Sale price¥22,800

0.715ct Loose Alexandrite from Orissa, India with Gemstone Report Sale price¥18,800

Brazilian alexandrite 0.061ct loose Sale price¥12,800

Brazilian alexandrite 0.058ct loose Sale price¥11,000

Brazilian alexandrite 0.051ct loose Sale price¥9,800

Brazilian alexandrite 0.060ct loose Sale price¥11,000

Synthetic alexandrite 4.3mm/0.379ct loose stone Sale price¥9,800

Synthetic Alexandrite Loose Stone 5.8mm/0.979ct Sale price¥22,800

Synthetic Alexandrite 1.241ct Loose Stone Sale price¥25,800

Synthetic Alexandrite 0.808ct Loose Sale price¥18,800

Synthetic Alexandrite 0.414ct Loose Sale price¥12,800

Russian Alexandrite 2.5mm/0.078ct Loose Stone Sale price¥49,800

Brazilian alexandrite 0.070ct loose Sale price¥39,800

Synthetic Alexandrite 4.3mm/0.430ct Loose Stone Sale price¥12,800

Synthetic Alexandrite 0.338ct loose stone Sale price¥12,800

Russian Alexandrite 0.091ct Loose Stone Sale price¥69,800

Alexandrite cat's eye from Sri Lanka 0.947ct loose Sale price¥18,800

Russian Alexandrite 0.083ct loose stone Sale price¥69,800

Russian Alexandrite 0.049ct loose stone Sale price¥49,800

Russian Alexandrite 2/5mm/0.070ct Loose Stone Sale price¥59,800

K18PGカナリーイエローダイヤモンド（トリートメント）0.214ct・アレキサンドライトリング中宝付

18KPG Canary Yellow Diamond (Treatment) 0.214ct (SI-1, Fancy Intense Greenish Yellow) and Alexandrite Ring Sale price¥128,000

Brazilian Alexandrite 0.097ct Loose Stone (Emerald Cut) Sale price¥38,800

Brazilian alexandrite 0.060ct loose Sale price¥14,800

[12554117] Brazilian Alexandrite 0.058ct loose stone Sale price¥14,800

Synthetic Alexandrite 5.7mm/0.827ct Loose Stone Sale price¥19,800

Brazilian alexandrite 0.102ct loose Sale price¥15,800

Brazilian alexandrite 0.091ct loose Sale price¥15,800

Synthetic Alexandrite 0.560ct loose stone Sale price¥14,800

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.