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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 Bicolor Zoisite 2.20ct loose (Bicolor Tanzanite)
Sold out タンザナイト 2.140ctルース
Sold out バイカラーゾイサイト 2.020ctルース
Sold out タンザナイト 1.24ctルース
Sold out タンザナイト 1.07ctルース
Sold out 【12525196掲載】ヒートチェンジジルコン 1.42ctルース
Sold out 【12525128掲載】タンザナイト 1.28ctルース
Sold out 【12524976掲載】タンザナイト 1.40ctルース
Sold out Tanzanite 0.99ct loose
Sold out 【さくらインカット】タンザナイト 1.07ctルース
Sold out 【12524916掲載】ブルージルコン 0.96ctルース
Sold out 【11524818掲載】タンザナイト 0.89ctルース
Sold out 【11524817掲載】タンザナイト 1.05ctルース
Sold out 【11524816掲載】タンザナイト 1.25ctルース
Sold out 【11524815掲載】タンザナイト 0.85ctルース
Sold out 【11524687掲載】タンザナイト 1.75ctルース
Sold out ジルコン 3.24ct原石
Sold out 【12524682掲載】ジルコン 3.19ct原石
Sold out 【12524679掲載】ジルコン 2.53ct原石
Sold out 【12524479掲載】ブルージルコン 0.570ctルース
Sold out Tanzanite 1.320ct loose
Sold out 【12524450掲載】タンザナイト 1.290ctルース
Sold out 【12524449掲載】タンザナイト 1.140ctルース
Sold out 【さくらインカット】タンザナイト 6mmルース - カラッツSTORE
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 【11523479掲載】バイカラーゾイサイト 1.016ctルース
Sold out 【11523476掲載】タンザナイト 0.770ctルース
Sold out 【11523475掲載】タンザナイト 0.760ctルース
Sold out 【12523437掲載】ジルコン 0.250ctルース
Sold out 【12523215掲載】ジェレメジェバイト 0.540ct原石
Sold out 【12523108掲載】ジルコン 0.640ctルース
Sold out 【12522870掲載】タンザナイト 7mm ルース
Sold out タンザナイト 0.684ctルース - KARATZ STORE|カラッツSTORE
Sold out タンザナイト 0.800ctルース - KARATZ STORE|カラッツSTORE
Sold out タンザナイト 0.664ctルース - KARATZ STORE|カラッツSTORE
Sold out タンザナイト 0.690ctルース - KARATZ STORE|カラッツSTORE
Sold out ブルージルコン 1.531ctルース - KARATZ STORE|カラッツSTORE
Sold out タンザナイト 1.012ctルース - KARATZ STORE|カラッツSTORE
Sold out タンザナイト 0.70ctルース - KARATZ STORE|カラッツSTORE
Sold out タンザナイト 1.234ctルース - KARATZ STORE|カラッツSTORE
Sold out Pt900バイカラータンザナイト0.691ct リング - KARATZ STORE|カラッツSTORE

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.