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december birthstone

December's birthstones are turquoise , lapis lazuli , tanzanite , and zircon .

Turquoise is a gemstone with a unique blue-green color that is famous for being used in Indian jewelry. Some have a distinctive black tracery pattern called a spider web. High-quality products without mesh patterns are called "Sleeping Beauty."

Lapis lazuli , also known as lapis lazuli in Japanese, is a gemstone that was once widely used as a paint. It is also famous for being used in Vermeer's masterpiece, ``Girl with a Pearl Earring.'' Gemstones are made from a collection of multiple minerals, and those that contain golden pyrite are often likened to the night sky, and I think they are gemstones with a unique beauty.

Tanzanite is the gemstone name given to the blue to violet zoisite. It is also famous for its strong pleochroism, which shows different colors when viewed from different angles, making it an attractive gemstone that makes you want to collect many different colors and pleochroisms. Large crystals can often be found here, so it is also recommended for those who like large gemstones.

Zircon is thought to be the first mineral formed on Earth, and is a gemstone that has been with humans since ancient times. When exposed to light, it emits strong dispersed light (fire). One of its characteristics is that it exhibits a phenomenon called doubling, in which letters and facet edges placed underneath appear double.

Karatz GemMagazine
" List of December birthstones/birthstones "

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Sold out Tanzanite 1.167ct loose
Sold out 【12523941掲載】タンザナイト 0.512ctルース
Sold out 【12523867掲載】タンザナイト 0.770ctルース
Sold out 【12523579掲載】タンザナイト 0.700ctルース
Sold out Tanzanite 0.580ct loose
Sold out Bicolor tanzanite 2.50ct loose
Sold out 【12523573掲載】バイカラータンザナイト 1.630ctルース
Sold out 【11523480掲載】バイカラータンザナイト 0.580ctルース
Sold out 【ダンデライオンカット】パープルタンザナイト6mmルース - カラッツSTORE
Sold out 【甲州貴石切子】タンザナイト 1.740ctルース - カラッツSTORE
Sold out 【ダンデライオンカット】タンザナイト 1.20ctルース - カラッツSTORE
Sold out 【ダンデライオンカット】タンザナイト6mmルース - カラッツSTORE
Sold out タンザナイト 4.660ct原石
Sold out 【スターインカット】ブルージルコン 7mm ルース
Sold out 【カラフリ】Pt900タンザナイト4.093ct・ダイヤモンドリング - カラッツSTORE
Sold out 【カラフリ】K18タンザナイト1.18ct リング - カラッツSTORE
Sold out レッドジルコン 2.170ctルース
Sold out 【さくらインカット】ブルージルコン 6mmルース ワッペン付 - カラッツSTORE
Sold out タンザナイト 1.670ctルース
Sold out タンザナイト 1.480ctルース
Sold out 【12525564掲載】タンザナイト 1.270ctルース
Sold out タンザナイト 1.040ctルース
Sold out 【12525560掲載】タンザナイト 0.940ctルース
Sold out タンザナイト 8.260ct原石
Sold out タンザナイト 3.380ct原石
Sold out タンザナイト 3.210ct原石
Sold out タンザナイト 2.890ct原石
Sold out タンザナイト 2.850ct原石
Sold out タンザナイト 1.060ct原石
Sold out タンザナイト 1.410ctルース
Sold out タンザナイト 1.200ctルース
Sold out タンザナイト 1.070ctルース
Sold out 【12525461掲載】タンザナイト 0.970ctルース
Sold out タンザナイト 1.220ctルース
Sold out タンザナイト 1.110ctルース
Sold out タンザナイト 1.080ctルース
Sold out タンザナイト 1.070ctルース
Sold out タンザナイト 0.980ctルース
Sold out K18ルビー・エメラルド・タンザナイトリング - カラッツSTORE
Sold out Pt900/K18タンザナイトリング - カラッツSTORE
Sold out バイカラータンザナイト 3.750ctルース
Sold out Bicolor Zoisite 2.600ct Loose (Bicolor Tanzanite)
Sold out タンザナイト 1.830ctルース
Sold out タンザナイト 1.34ctルース
Sold out ヒートチェンジジルコン 0.95ctルース
Sold out タンザナイト 1.46ctルース
Sold out 【12525129掲載】タンザナイト 1.38ctルース
Sold out 【12525127掲載】タンザナイト 1.25ctルース

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.