Skip to content
8月誕生石

August birthstone

August's birthstones are peridot , sardonyx , and spinel .

Peridot is a gemstone with an impressive refreshing green color like young grass. The mineral name olivine is said to be derived from its resemblance to the color of an olive fruit. It is said that it is sometimes included in meteorites, and they are called parasitic peridots .

Sardonyx is a type of agate , and refers to agate with striped patterns on a brown to reddish brown background. It is a gemstone that has been used as a material for cameos and intaglios since ancient times, and has been loved mainly in Europe. Those without stripes are called thirds.

Spinel is a gemstone that comes in many shades, including red, blue, and pink. It is often produced in the same octahedral shape as diamonds, and its rough form is also popular among collectors. With a high Mohs hardness of 8, it is a gemstone that can be enjoyed as everyday jewelry.

Karatz GemMagazine
" List of August birthstones and birthstones "

Sort by

Pink spinel 0.409ct loose Sale price¥8,800

Spinel 1.680ct loose Sale price¥8,800

Pink spinel 3.208ct loose Sale price¥128,000

Spinel 1.318ct loose Sale price¥12,800

Purple spinel 0.754ct loose Sale price¥9,800

Blue spinel 1.949ct loose Sale price¥29,800

Red spinel 0.195ct loose Sale price¥6,980

Bicolor spinel 0.737ct loose Sale price¥29,800

Star spinel 1.210ct loose Sale price¥15,800

Pink spinel 0.290ct loose Sale price¥7,980

Purple spinel 0.210ct loose Sale price¥6,980

Bicolor spinel 1.17ct loose Sale price¥79,800

Sold out Red spinel rough stone 1 stone (raspberry color)《Discount available for multiple purchases》
Sold out Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for advanced users: rough spinel from Mozambique)
Sold out 1 stone peridot (pyramid cut, 5mm)《Multiple purchase discount available》
Sold out [Available at 10 PM on August 16th] [Limited to 9 stones] Spinel Gacha (August birthstone) including one bicolor spinel (0.93 ct) [Multiple purchase discounts available]
Sold out [Available at 10 PM on August 15th] Limited to 15 stones: One in five stones is a dandelion-cut spinel. Get one specially cut August birthstone spinel gacha (plus one mahenge spinel). Discounts available for multiple purchases.
Sold out 【サンジェ氏】パープルスピネル 0.740ctルース
Sold out スタースピネル 0.936ctルース
Sold out パラサイティックペリドット 0.034ルース
Sold out ミャンマー産レッドスピネル 0.234ct原石
Sold out ミャンマー産レッドスピネル 0.226ct原石

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 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.