black/black jewelry

There are a variety of jet-black gemstones, from those with a chic all-black appearance such as black diamond, morion, obsidian, onyx, and jet, to unique ones such as black opal and black star sapphire. It is often used in men's jewelry, and one of its appeals is that it is simple yet cool.

Karatz GemMagazine
" Top 10 Black Jewels "

Romanesite in Quartz 4.825ct loose stone Sale price¥12,800

Mica in Quartz 0.865ct Loose Stone Sale price¥6,980

Mica in Quartz 0.736ct loose stone Sale price¥6,980

Mica in Quartz 0.710ct Loose Sale price¥5,980

Mica in Quartz 0.594ct loose stone Sale price¥5,980

Sri Lankan Ilmenite in Star Sapphire 3.426ct loose stone (Ratnapura) Sale price¥49,800

Australian black opal 2.407ct loose Sale price¥59,800

Salt and pepper diamond 0.446ct loose Sale price¥39,800

[Cat cut] Dendritic agate 13.569ct loose stone Sale price¥12,800

[Cat cut] Dendritic agate 6.757ct loose stone Sale price¥12,800

Australian black opal 1.744ct loose Sale price¥39,800

Australian black opal 0.959ct loose stone Sale price¥18,800

Australian black opal 0.296ct loose stone Sale price¥8,800

Australian black opal 0.357ct loose stone Sale price¥12,800

Australian black opal 2.277ct loose stone (play of color on both sides) Sale price¥34,800

Mica in Quartz 0.980ct Loose Sale price¥6,980

Mica in Quartz 0.864ct Loose Stone Sale price¥6,980

Mica in Quartz 0.834ct Loose Stone Sale price¥6,980

Mica in Quartz 0.760ct Loose Sale price¥6,980

Mica in Quartz 0.588ct Loose Stone Sale price¥6,980

Mica in Quartz 0.544ct Loose Stone Sale price¥6,980

Dendritic quartz 4.272ct loose Sale price¥9,800

Dendritic quartz 3.875ct loose Sale price¥8,800

Watermelon tourmaline 3.250ct loose Sale price¥5,980

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[8/11 22:00 Sale] 1.613ct Loose Iolite Sunstone from India

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Brazilian Dendritic Quartz 7.788ct Loose Stone

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Brazilian Dendritic Agate 2.762ct Loose Stone

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Myanmar Star Spinel 0.936ct Loose

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Australian rainbow lattice sunstone 0.678ct loose

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Synthetic Black Opal 7.5mm/1.348ct Loose

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Indian Iolite Sunstone 4.8mm/0.450ct Loose Stone

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Hana Shinju (Black Pearl) 13mm/18.972ct Loose Pearl Hana Shinju Guarantee Card

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Iron Opal 184.250ct Loose Stone, Japan-Germany Exchange

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Sri Lankan magnetite 5.083ct loose stone

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[Cat cut] Dendritic agate 5.326ct loose stone

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Benitoite 127.771ct rough stone

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.